: MPG and other ramblings
03-05-2004, 03:27 AM
Well I suppose my SVTF is fully "broken in", I have just reached 17,000 miles. My latest mpg with mixed city and highway driving is 27.335. This is with the winter tires on it, and I guess I would gain a mpg or two with the stock conti's.
I have noticed in the last few 1,000 miles my exhaust has taken on a different tone. It now seems to be lower pitched and a bit more throaty, it sounds great, and I find my self riding around with the window down more now, so I can hear the great sound it makes. The car just seems to be getting better with age. [8D]
While cleaning under the hood the other day I noticed a huge build up of salt on the pass side between the upper fender apron and the coolant tank, and on the drivers side just in front of the air box snorkle. I mean the stuff was really packed in there. So you folks living in the north where they use salt on the raods, I would suggest you ckeck this out. I broke the chunks up with a screw driver (don't scratch the paint) and then hosed those areas off with lots of water. I think there should be some type of splash shield under there to keep this from happening.
03-05-2004, 09:25 AM
Thanks for the heads up on the salt. I will have to check it out.
03-05-2004, 12:35 PM
Where your struts connect under the hood in the engine compartment, there is a hole on the front-side where you can see into the wheel-well area, I was getting mud splashing up into the engine compartment through these holes on each side.....just take some silicone based sealent (the kind in the big tubes that you use the calking gun with) and fill those holes on each side up...problem solved =)
03-05-2004, 12:36 PM
pics of before I sealed the holes
you can see the area that ya fill in, the spot with all the mud that splashed through =)
03-05-2004, 12:43 PM
Yes I think that just might be the ticket. Thanks for the idea!!
03-05-2004, 12:46 PM
silicone is good since its clear you cant even tell its there =)
03-05-2004, 07:56 PM
I was going to start a new thread, but since yours has MPG in the title, I figured I could tag my crap along:
This being my first new car, and the fact that there is a penholder, I have been keeping track of all the fuel and mileage. Nerd Alert!!!
Since I am a big proponent of synthetic oils, I though this would be a good way to get some real world data…and give back to the Internet community who has given me hours and hours of porn and videos of things such as a little dog humping a Pikachu stuffed animal. Glorious!
At first I got gas at 2 or 3 stations, but didn't top off at all. But after the first month or so
I started to go to the same pump or 2 at the local Chevron. Premium was $2.46 today!!! This was to try and add some control/consistency to the test.
The first few times I did not record the dates, but I got the car in late November.
3 Road Trips:
To San Diego on Dec.24 and again on Dec.31 (I LOVE SAN DIEGO!!!)
To Prescott, AZ on Jan. 16.
During these trips was when I was getting the 29-31mpg.
On December 6th I did 4 laps at Willow Springs Raceway (Big Track). http://www.alltimeracing.homestead.com/December6Saturday.html
Hit about 100mph before the brakes for Turn 1, about 105mph into Turn 8, all the time keeping revs below 6000rpm because the car barely had 1000miles on it!!!
I put in a K&N air filter sometime in early December.
I used 40 PSI in all tires for the first trip to SD and have tried to keep it there ever since.
My normal weekday involves about 15 freeway miles and 5 city miles to work, and about 10 city miles for lunch. So the average day is about 30 freeway and 20 city miles.
Oil and filter at 1000 miles, Castrol 5w-30, Car Quest Filter
Oil and Filter at 3415 miles, Castrol 5w-30, Car Quest Filter
Oil and Filter at 6340 miles, Mobil 1 5w-30 Full Synth, Car Quest Filter
Why the Car Quest filters??? They are the only car store in town, but they did say they had a $4 Brand X filter and a $7 CQ filter. I went with the $7 filter…
This is just a preview of whats to come. I will not make any changes until the next oil change at 10,000miles. Then I will decide to either:
Change the Transaxle fluid to full synthetic (Mobil 1, Royal P, Red Line)
Add Militec-1 to engine oil
The average is 26.664mpg. So far the first tank with Mobil 1 oil is looking promising with a 27.345mpg, but seeing as how I got a 27.050mpg earlier in February, this means nothing. The next few tanks will really put the Mobil 1 to the test, it does say on the bottle you will get better mileage. Also, the car could be breaking in more too, soo, take this for what it is...
I will continue to use Mobil 1, I will change the oil out at 10,000 miles and then change the oil at 5,000 mile intervals.
Any comments? Suggestions? Should I get a life?
03-05-2004, 11:10 PM
I just wonder if those aren't drain holes of some sort.
SLIP STREAM SVT
03-06-2004, 12:33 AM
WoW those are really good milages, i'm only getting approx 23mpg, approx 255 miles to the tank, which i think sucks cause i do do quite alot of highway driving, and i don't always rev to high usually shift around 3-3.5k rpm, i don't understand how come so many other SVTF's are getting such a better MPG then mine! sorry for the rant just trying to feel sorry for myself! [:)]
03-06-2004, 11:09 AM
Yeah, slip.. I'm the same. I have all highway miles, and shift under 4k most of the time, and my gas mileage is about 300 miles per tank..I don't get it?? This isn't any better than my supercharged mustang!
SLIP STREAM SVT
03-06-2004, 12:02 PM
Wow you get 300mpg, i would kill for those #'s i've never ever been over 255mpg cause that's the highest i've ever been not to sure if it's cause it's winter and the extreme cold is making it worse. when i bought my baby in 03 of Aug. it wasn't really cold it had about 20miles on it and my first tank of gas only lasted 200mpg, i just took it as a break in period but now i habe about 7k miles on it and it's still bad! always get in between 200 - 250 mpg! i took it to the dealer one time for this and all they told me was that it's normal! what more can i say?
03-06-2004, 03:03 PM
What tire pressures do you run? I feel anything below 36 PSI is waay too low. I run 40 PSI front and back, and I bet that makes a big difference. Try it for a tank or two.
I just filled up yesterday, I did drive into Los Angeles and back, about 200 miles on the freeway and about 25 miles in the city (plus normal work driving). I had 328 miles on the clock and the light wasn't even on yet. And when I filled it up it was a touch over 11 gallons. So about 29 mpg. But, for my normal freeway/city driving, I now see around 290-300 when the light comes on.
I would say, try using 40 PSI in your tires and see what you get. Then try the same but get gas at Chevron. I really do think the gas is better than some joe-blow gas station. Hmmm, maybe I can fill up at a random local gas station and see if there is a difference...
SLIP STREAM SVT
03-06-2004, 06:04 PM
i actually run 32psi on the front and back, i was just following the recommendation that is on the fuel filler door, i just think that 40 would be too much but i'll try it out today, hope it will help my milage though! thanks for your suggestion rayrevolver!
03-06-2004, 08:03 PM
If you are uncomfortable with 40 PSI, try 36 PSI first.
The biggest downside to running high pressure is the car seems a lot more nervous at high speed (>125mph) and a lot more prone to slide/push. When I first got the car, I ran the recommended 32/29 (I think) and it worked great on the mountain.
I just got back from a high speed "test." I did my first run at 110 uphill and the car was great. Bumps were soaked up, the steering was a little light, but the car felt very comfortable. On the way back, downhill, I wicked up the speed to between 120-130 and it was very twitchy. Not so bad that I couldn't keep it in my own lane, but bad enough that I don't want to do it again unless I get a suspension upgrade.
I first went to high pressure for a road trip, and have just kept it at 40 ever since. If the tire wear shows that is too high, I will back it off. I guess if you do a lot of twisty road attacks, be sure to build your speed slowly as the high pressure does mean less grip.
svt pwr 02
03-06-2004, 09:37 PM
Rayrevolver, 40 psi is indeed too high. You're operating the tires outside their design with that pressure. You're increasing the likelihood that the carcass will deteriorate- specifically the tread are may come apart since the heat (hysteresis) cannot distribute itself throughout the tire . You'll find the tread will wear in the center, very prematurely. You also have no grip. Must ride like steel marbles... and slip around in the corners...
Get some chalk, on a dry day make a few chalk marks across the face of each tire. Drive a ways and stop and check the marks. If they wear off in the middle first, you need less pressure. If they wear off at the edges first, you need more pressure. When the tread face wears evenly, the tire pressure is perfect for the load the tire is carrying. This is true of all tires, on any vehicle. (Except motorcycle tires- no flat tread face... ;-) By finding the pressure this way, you will not only be operating the tire in best manner possible, you will maximize the tread life as well. Overinflating is as dangerous as underinflating, and the 1-2 mpg you can gain won't cover the cost of buying tires more often, so don't do it.
By the way, we have 50,ooo miles on the SVT now and average 32-35 mpg. 80% freeway miles.
03-07-2004, 03:08 AM
I can dig it. The tires say max pressure is 51 PSI, so I figured 40 PSI was not too high, and not overinflated.
I know that when people do track days on street tires, they run the pressure up (opposite of what we do with motorcycles) because the sidewalls are not stiff enough, and without the high pressure, you end up on the sidewalls mid-corner!!!
Have you done the chalk test thing? What pressure do you run?
03-07-2004, 03:17 AM
Oh yeah, when I ran 32 PSI in the front and cornered hard, I was actually wearing the sidewalls. It was crazy, I got home and the labels were scratched up on the front tires! Too much sidewall flex!!
In a perfect world I would get another set of rims with race tires (ie stiff sidewalls and run them at lower pressure for absolute grip/heat) and swap them out on weekends when I hit the twisties.
I know that heat in tires can come from sidewall flex from underinflation, this is bad like the Firestone Explorer debacle. But I really don't think, even with crazy street driving, you build enough heat in the tires for overinflating to be a problem(@ 40 PSI), other than increased center wear.
I am really interested in what you have found though. I will glady trade 1-2 MPG for a few thousand more miles on the stock tires.
03-07-2004, 10:55 AM
Im still in shock reading this.... Ive only had my SVT a little while now.. but... ive put in 3 tanks of gas... 1st tank 208 miles (Granted i hot rodded it)... 2nd tank 206 miles (minimal hot rodding).. 3rd tank @ 1/2 right now 90 miles on trip display..(no hot rodding thus far.. all highway)... Whats up with that ! ?
SLIP STREAM SVT
03-07-2004, 11:05 AM
Exhondaman, i totally understand your concern, i was like freaking out too when i first got my SVTF and drank so much but eventually it will get better but not by much, cause i use to have exact same problem as you but now that i'm at like 7k miles and it's doing a bit better but it's kinda cold so i think that might contribute to a bit of the loss in mpg, also i think if i drive it more and get to around 15k miles i think or at least hope i'll get as good gas milages as the others here, also rayrevolver says to run your tire pressure a little higher, maybe not to 40psi like he does but in between what the company reccomends and rayrevolver reccomends!
svt pwr 02
03-08-2004, 04:22 PM
We have found that 32 front and rear is about right. We have 38,000 miles on the stock Conti's with no wear pattern (other than the front's round the edges from cornering more than the backs between tire rotations) and they are about 35% tread remaining. You're right about hard cornering scraping up the sidewalls, I was surprised when I saw it. This only happens when I drive it - my wife would crap if she knew how hard I push her SVT - actually she'd probably be astonished to learn how hard you actually CAN really push this car! I have 15 miles of twisty mountain road on my daily drive... ;-)
I put in a call to my favorite tire engineer (I'm an engineering consultant) and he said that a car this size with tires like we're talking about, 40 psi is probably pushing it a bit but not likely to suffer catastrophic failure because of it. Remember though, that tires build much more heat during hard driving than cruising, and if you start out overinflated the pressures can go high pretty quickly. He says modern sporty tires are pretty effecient rolling resistance-wise, and pushing it up to 40psi is probably not going to help your mileage much anyway, in the long run you might see 1-2 mpg better.
03-08-2004, 06:37 PM
Second tank full in this test. 27.335 MPG x 13.2 gallon capacity = 360.822 miles.
I can't believe some of you folks are getting such poor milage. I see several post that mention where they shift (RPM"S). One point to keep in mind if you are trying to sip gas, it's not the rpm you shift at, it's the way you get there. If you punch it and hit the trottle hard you are sucking fuel, not sipping. I am sure you all have heard "drive like there is an egg under the gas pedal. Nice and easy, and use your top gears once the car has reached the speed you want.
Gas prices are going up and up, (and premium is really getting expensive) saving fuel is a technique that should be learned. Around here premium gas is selling for 2.01 a gallon, but I have found a place near home selling premium for 1.89. It's Citgo gas, I suppose Citgo is as good as any, I've never had any problems with it. This summer, when the "Tree Huggers" get their way, we will all have to buy gas with corn-based ethanol, and that is going to drive prices up here, to about 2.25 - 2.30 per gallon....................YIKES!!
So think sip, not gulp
03-08-2004, 09:29 PM
Thanks SVT PWR 02, I will change the tires to 32 PSI and see how it goes. What is crazy to me though, is that at the track they run the pressure up for street tires. I could see the tire failing under that kind of pummeling. I am an engineer, but only in real life...
bfocused, the most miles I have seen on 1 tank was 336 miles, and the most gas I have put in was 11.8 gallons. Gas is almost $2.50 here, I heard somewhere they said it would hit $3.00 this coming summer.
NOTE: I went to Santa Monica last week, so the mileage looks good. Don't think the switch to Mobil 1 netted me 2 extra mpg's.
03-09-2004, 01:20 AM
Ray, what is your best highway mileage? I can't really tell how much city/highway you have on your chart (which looks pretty good)...
svt pwr 02
03-09-2004, 02:59 AM
At the track they don't run the tires for very long, that's how they do it. Or, they are willing to sacrifice the tires, as opposed to wanting to get decent life out of them. Let's face it, even a tire failure at the track is not as scary as on the 5 doing 70 with 100 morons half asleep in minivans and 4x4s all around you....
svt pwr 02
03-09-2004, 03:04 AM
I looked back through the mileage log. Our best mileage was on a 1100 mile trip, with 2 tankfuls in a row at 36. something. Worst tankful ever was 26. something. Mostly, week after week, it's 32-33. Remember this car goes 120 miles a day on the interstate, but she does drive like she stole it...
03-09-2004, 11:15 AM
31-Dec was pure highway, 31.5 MPG
20-Jan was pure highway, 30.1 MPG
My guess is that the car should get about 32 MPG on the freeway and possibly 23 MPG for normal [:)][:)][:)][:)][:)][:)]**footing around.
My average is 26ish, and that is a good half and half.
Yeah, bringing your car to the track, you expect things like tires/brakes to wear a bit.
I am hoping after the engine breaks in more, I switch to full synthetic in the trans, and I get some lighter wheels, my MPG goes down a bit. I am happy with the current mileage though, not bad for a high strung 4-banger.
I was just reading that the RX-8 guys, with all of 1.3 Liters and 237HP were struggling to get 26MPG on the freeway at 60mph.
36 MPG is a big jump though. I do live at 2000 ft which should reduce efficiency a touch.
03-09-2004, 11:17 AM
Hey! *p u s s y f o o t i n g* is a real word! I am upset that I have been censored! hehe
03-09-2004, 11:54 AM
What? They filtered the word [:)][:)][:)][:)][:)][:)]**?
03-09-2004, 11:56 AM
I don't believe it!! What is wrong with [:)][:)][:)][:)][:)][:)]**? I am having some serious 1st amendment issues right now! This sucks (s u c k s, just in case the censor police get that too!)
03-09-2004, 12:55 PM
I'm dumbfounded by the MPG ratings some of you are getting. I have yet to get better than 24 and my driving is about 75% highway miles. Can driving style account for this difference, or is it a differnence in the tuning of the cars from the factory? Seems strange to me. I don't beat on the car when I'm commuting to work, so I would tend to believe that it's the tuning. The extra 5 MPG would reallly make a difference in the commuting costs!
svt pwr 02
03-09-2004, 01:33 PM
I had a Stealth and got 31 mpg on trips if I drove like a citizen. Not bad for a heavy car with 220 hp.
We had a ZX3 S2 before the SVT, she got 38-40 with it. I only get 15 in my F150
03-09-2004, 01:40 PM
Holy crap, 32 mpg? Damn i have never gotten better than 24, granted i do drive my car like i stole it most of the time. But even with runs down to san diego, all freeway i still get the same, around 25 mpg. I have 19k on my car (so it is far from broken in). Maybe if i switch to synthentic, or get my car the latest "patch" might help.
03-09-2004, 06:00 PM
Ah, something I left out, I am still running the RLA6 program.
I have thought about getting the YRF0 for the DSI switch at 5,000rpm, but I am a little chicken I guess.
My car does slightly surge at 2000-2500rpm with light throttle. Not bad though. The battery light has come on maybe 3 or 4 times, but only when I was coming to a stop in neutral, and the engine would wind down, maybe too much, but not stall. Both more apparent when cold.
I will admit that I drive around like a grandma 90% of the time, light on the gas, change gears around 3200rpm. Get it into 6th ASAP and chill. But then I will go out just to drive a specific road and fah-get-about-it.
03-09-2004, 08:46 PM
You really should get the YRFO, you will see a big difference. Better throttle response, no surging, no more hard starts and the change to 5,000 grand for the DSI is what you'll see.
It's free, and you'll get a free car wash too!!! lol
04-28-2004, 05:05 PM
New update. I have left the bloody tires at 40PSI as a "control." The biggest change is that I live in the stoopid high desert, so the winter was cold, and now it is getting hot so I've had to use the AC. No flash update, I heard about an RLA7 coming out. I might wait for that since I don't want to bother with the dealerships.
I haven been driving like mad, a road trip to Tucson and to LA three or four times. I have noticed my normal work routine MPG is up about 1MPG since the switch to Mobil 1. You could argue the car is breaking in and you would be right. I cannot say it is the oil only.
MPG Average has gone up from 26.7 to 27.6MPG.
On the right side you will see a Castrol vs. Mobil average, note that I threw out the highest and lowest from each group FWIW.
I did get a 34.9MPG on the way back from Tucson with no AC, cruising around 83 in AZ and 78 in CA.
This week I will change out the engine oil and hopefully get full synth in the tranny.
04-29-2004, 01:13 AM
For the low mpg guys...do you top off? I squeeze all I can without spilling to be a little more accurate until the next fill-up. Stopping when the gas shuts off is far from "filling"it. I've found I can get at least another gallon or so in there. I rarely put my foot in it but when i do I'm 16 and crazy again...I got caught too many times back in the day and still am a little gun shy..except for the time....but that's another story.
1 question ladies and gentlemen...the dealership will flash my chip to...YRFO or RLA7...what does this do and do I need it done to my 04?..thanks...e.e.
12-09-2004, 06:20 AM
I heard its not very safe to "top off" by squeezing another gallon after auto shut off. So i dont do it. I get about 290 mixed. I dont understand how you guys are getting such good milage.
Can someone confirm with how many gallons remaining the fuel light comes on?
12-09-2004, 07:12 AM
When my fuel light comes on, I fill the tank back up and put 11 gallons or just over in it. And I beleive its a 13 gallon tank, so theres a little room to spare but not much if your in the middle of no where driving like a bat out of hell...[burnout]
12-09-2004, 01:03 PM
I calculated my gas milage for the first time and only got 19 mpg, mostly city driving though.
12-09-2004, 06:06 PM
Driving in city, pulling very softly and no more than 3k~3.5k rpm, my normal is 320~340miles per tank.
My best was in motorway and higway doing 80mph is 360mile per tank.
Got the latest reflash, and K&N typhoon "home made" with 28kmiles on the clock
12-09-2004, 07:36 PM
Now that I switched to full synthetic Mobil 1, i get much better gas milage. My SVT also loves 76 more than any other gas. Right now I was at 240 with the needle showing a 1/4 left. I run 33/29 in my tires, probably should try 36/36psi in both.
12-09-2004, 10:01 PM
I never top off for consistency. I used to run 40/40 in the tires, but now that the tires are almost dead on the corners I run 45/45.
Mileage has been going up since I switched to full synth in the tranny. Just recently I put in Motul Gear 300.
I used to get around 26-27 for my normal driving and 31-32 on the freeway. Recently it has been around 28-29 normal and I got almost 320 on a tank. I have not been updating that spreadsheet, but maybe I will and you can compare 2003 vs 2004 and different tranny oils.
I have yet to do a flash either...and I need to clean my K&N....
I would switch to some sort of synth for the tranny, although I can't tell a huge difference between Royal P and Motul, the shifting is a lot better than stock.