anyone using premium gas ? - Page 69 - Focus Fanatics
Ford Focus Forum
HomeContact UsAbout UsGalleryDiscussion ForumsMarketplace


Go Back   Focus Fanatics > Ford Focus Third Generation > DURATEC Ti-VCT Performance (2012-Current)

DURATEC Ti-VCT Performance (2012-Current) The place to chat about any Duratec 2.0L Ti-VCT engine performance, tuning and exhaust related upgrades.

Search This Forum | Image Search | Advanced Search    
Ford Focus Tire & Wheels FocusFanatics Merchandise

Reply
 
Thread Tools Display Modes
Old 01-25-2013, 04:13 PM   #681
Ranx0r0x
Focus Rookie
 
Join Date: Jan 2013
Fan#: 109077
Location: Austin, TX
What I Drive: 2013, White, SE Hatch

Posts: 4
FF Reputation: 1 Ranx0r0x Good Standing Member
Buy-Sell-Trade Rating: (0)
thejordan,

You are right about the cost trade off and since this is specifically about MPG that's a big deal. Even that has trade offs even if there is an improvement. Improvement around town? Improvement on the freeway? Improvement in both but mostly in one? None at all? I suspect that improvement would be mostly in stop light to stop light driving. That's a pretty easy calculation to determine if it's worth it or not.

Getting into possible performance benefits and question becomes tougher. That's not generally about the money.

Part of the problem I think is in Ford's own sloppy use of the term "performance". I mean, really, what does that mean? Higher torque at the given RPM? Higher or equal torque in a lower RPM? Higher torque across range?

...or are they equating performance with MPG? Or both?

A rather weasely word on Ford's part.
Ranx0r0x is offline  
    Reply With Quote
Sponsored Links
Advertisement
 
Old 01-25-2013, 04:51 PM   #682
mac.mogul
Focus Fanatic
 
mac.mogul's Avatar
 
Join Date: Oct 2011
Fan#: 90409
Location: Wichita, KS
What I Drive: 2011 Sterling Grey SES Sedan

Posts: 3,670
FF Reputation: 13 mac.mogul Great Standing Member
Buy-Sell-Trade Rating: (0)
Sitting and idling isn't bad, but it isn't necessary. I can promise you your engine will warm up faster if you drive it instead.
__________________
2011 SES 5spd #006 >> SR #213

What other people think of me is none of my business.
mac.mogul is online now  
    Reply With Quote
Old 01-25-2013, 08:41 PM   #683
suss6052
Focus Addict
 
suss6052's Avatar
 
Join Date: Feb 2012
Fan#: 95752
Location: ..., MI
What I Drive: 2013 Ford Focus ST2 Ingot Silver

Posts: 12,272
FF Reputation: 23 suss6052 Great Standing Member
Buy-Sell-Trade Rating: (3)
Quote:
Originally Posted by mishka View Post
Is there any way to get the normal (non-winter) gas? I rarely start driving on a cold engine.
On that note, it takes almost 5 minutes for the engine to warm up in this 25 degree weather. Is it better to drive it cold since i'm not getting any "mpg" while sitting there at 0 mph? Or should I warm it up like I have been doing? I thought that colder engine uses more gas.
Nope, no one carries summer blend gas throughout the winter. It has nothing to do with just starting to drive on a cold engine, more so with the emissions during the winter time. Its bad for fuel economy to sit there and idling, and the engine will warm up better if you drive the car gently right away.
__________________
Moderator for: DURATEC Ti-VCT Performance, ST Performance, MK3 Focus
suss6052 is online now  
    Reply With Quote
Old 01-25-2013, 09:10 PM   #684
thejordan
Focus Addict
 
thejordan's Avatar
 
Join Date: Dec 2012
Fan#: 107706
Location: Southern, CA
What I Drive: 2013 SGM Focus 5 Speed

Posts: 644
FF Reputation: 4 thejordan Good Standing Member
Buy-Sell-Trade Rating: (1)
not to mention other drivetain parts will warm up to operating temp by driving it. usually most cars have TGVs or butterfly valves to protect itself until it's warm.
thejordan is offline  
    Reply With Quote
Old 01-25-2013, 09:59 PM   #685
mishka
Focus Addict
 
mishka's Avatar
 
Join Date: Dec 2012
Fan#: 107408
Location: Germantown, MD
What I Drive: 13' TB SE Sport Sedan DCT 201A pack

Posts: 974
FF Reputation: 1 mishka Good Standing Member
Buy-Sell-Trade Rating: (0)
that is good to know. I was always told to warm it up before driving. I guess it's actually you have to warm up the car before DRIVING >8)
__________________
~ Shadowfax ~
mishka is offline  
    Reply With Quote
Old 01-25-2013, 10:47 PM   #686
thejordan
Focus Addict
 
thejordan's Avatar
 
Join Date: Dec 2012
Fan#: 107706
Location: Southern, CA
What I Drive: 2013 SGM Focus 5 Speed

Posts: 644
FF Reputation: 4 thejordan Good Standing Member
Buy-Sell-Trade Rating: (1)
Quote:
Originally Posted by mishka View Post
that is good to know. I was always told to warm it up before driving. I guess it's actually you have to warm up the car before DRIVING >8)
it's more of an old school thing when vehicles still used carbs, weren't designed to be well lubricated, etc. nowadays it doesn't matter, you're wasting gas idling since it'll take longer to warm up than driving.

it's like a warm up for practice, run to warm up.
thejordan is offline  
    Reply With Quote
Old 01-26-2013, 07:52 AM   #687
Darth_Focus
Focus Enthusiast
 
Join Date: Oct 2012
Fan#: 104539
Location: Toronto, Canada
What I Drive: 2012,Tuxedo Black, Titanium

Posts: 100
FF Reputation: 1 Darth_Focus Good Standing Member
Buy-Sell-Trade Rating: (0)
I've noticed far more stability with the 91. If I'm aggressive the mpg seems to flatline in the. 9.? L/100. With 87 it would jump the second I hit the gas right up into the teens. Aggressive driving on 91 nets me more than 100 km per tank vs driving like miss daisy on 87.
Darth_Focus is offline  
    Reply With Quote
Old 01-29-2013, 12:57 PM   #688
Roadworthy
Focus Enthusiast
 
Join Date: Jan 2013
Fan#: 109039
Location: Edmonton, Canada
What I Drive: 2012 SGM MK3 Titanium

Posts: 168
FF Reputation: 1 Roadworthy Good Standing Member
Buy-Sell-Trade Rating: (0)
Here is an interesting idea:

Those who have a 2012 TI or I think virtually any 2013 that is designated as being able to use E85, I think they are tuned to scale better with higher octanes. E85 from my understanding has a much higher anti-knock rating, hence why people throw it in for race applications. The big requirement for engines to use E85 from what I remember is high pressure (Direct injection) and a tune that can scale the ignition timing higher to take advantage of the higher anti-knock properties, hence more power!
Roadworthy is offline  
    Reply With Quote
Old 01-30-2013, 06:10 PM   #689
SPRAYPAINT
Focus Enthusiast
 
SPRAYPAINT's Avatar
 
Join Date: Sep 2011
Fan#: 89747
Location: Katy, TX
What I Drive: 2014 Sterling Grey Focus SE Sedan

Posts: 541
FF Reputation: 2 SPRAYPAINT Good Standing Member
Buy-Sell-Trade Rating: (0)
Quote:
Originally Posted by frinesi2 View Post
the 2.0l gdi ti-vct is tuned to adjust for whatever octane rating of fuel you've put in it. Since it is a high compression motor (12.0:1 compression ratio) it can take advantage of the increased energy density of high octane fuel and will produce more torque. If this were five years ago and the engine were fuel injected, it would require premium fuel to run properly. The advantage of direct injection, and more advanced control systems and sensors, is that you can run lower octane fuels without issue if you want to save some money.

I have noticed that i get a bit more low to mid-range grunt when driving on a tank of premium. This helps me get slightly better fuel economy around town, but when i'm doing days of highway driving, the octane rating seems to have less of an effect on fuel economy.

Be careful with randomly filling up any old car with premium, however. With some cars it will do more harm than good, or it will just do nothing. The focus has a pretty snazzy engine, however, which is why you're seeing the improvements.
Quote:
Originally Posted by cbdallas View Post
"my friend said it can't hurt the car and its "good to clean out the car" with high octane - once a month he said".

This is the point where you stop believing everything you're told. This is also the school of thought that has been making fuel companies rich for decades.

Octane has no cleansing properties, and 93 has no more detergents in it than 87. Different brands of gas differ in their use of detergents, which is why you'll want to stick with top-tier fuel suppliers if cleanliness is a concern.

http://www.toptiergas.com/retailers.html

octane is a pre-ignition eliminator, and that's all it does. It's good to use in higher-compression engines and turbo applications where pre-ignition can occur during high load situations. Pre-ignition manifests itself as spark knock and is akin to striking the tops of the pistons with a hammer.....something you'll want to prevent by using the fuel that's required in your owner's manual.

The 2.0 is engineered to run fine on 87. If you use 89 - 93 octane, you might experience a slight spark timing bump if this engine is set up to detect octane, like the nissan vq and many other engines are. This may yield you a couple of hp, and it may not. There may be a time during a hot summer day, with the a/c on and a car load of people where you accelerate and hear a slight 'ping', and bumping up a grade can eliminate that. But the spark knock detector on your engine is also there to back off the timing a degree or two to put a stop to it, so either way, your engine's best interests are being looked after. If you have excessive spark knock that won't go away, it's time to head to the dealership.


The 2.0t will give you spark advance with higher octane levels, and it's the only way to truly achieve 252 hp with that engine. With the use of 87, i believe it detunes itself to 244. But don't believe what you hear about 'cleaning your engine with octane'. It's simply not true.
i like
__________________
It is what it is in life... Just have fun with it!

January 2012 Ride Of The Month
SPRAYPAINT is offline  
    Reply With Quote
Old 01-30-2013, 06:38 PM   #690
suss6052
Focus Addict
 
suss6052's Avatar
 
Join Date: Feb 2012
Fan#: 95752
Location: ..., MI
What I Drive: 2013 Ford Focus ST2 Ingot Silver

Posts: 12,272
FF Reputation: 23 suss6052 Great Standing Member
Buy-Sell-Trade Rating: (3)
Quote:
Originally Posted by Roadworthy View Post
Here is an interesting idea:

Those who have a 2012 TI or I think virtually any 2013 that is designated as being able to use E85, I think they are tuned to scale better with higher octanes. E85 from my understanding has a much higher anti-knock rating, hence why people throw it in for race applications. The big requirement for engines to use E85 from what I remember is high pressure (Direct injection) and a tune that can scale the ignition timing higher to take advantage of the higher anti-knock properties, hence more power!
E85 is not particularly high octane. It's on par with 90-93 AKI octane rating fuel generally. Pure Ethanol has a higher octane rating, but most of the time they blend in sub-octane gasoline with E85 in order to lower the cost per gallon.

People use it for race applications because its cheaper than racing fuel, contains its own oxygen supply, and has a cooling effect as compared to E10 when injected into the combustion chamber due to the higher latent heat of vaporization.
__________________
Moderator for: DURATEC Ti-VCT Performance, ST Performance, MK3 Focus
suss6052 is online now  
    Reply With Quote
Reply

Bookmarks & Social Networks

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -5. The time now is 03:40 PM.


Copyright 2002-2014 FocusFanatics.com. All Rights Reserved : Terms of Use : Privacy Policy : Advertise Information : Site Map

Focus Fanatics Ford Focus Forum offers many fun ways for you to engage with other Ford Focus Owners from across the world. Whether it be about the aftermarket performance modifications, technical how-to's, European tuned suspension or awesome fuel economy similar to the Acura TLX or Fiesta ST. You can find all Ford Focus and Focus ST related information here. Join our Ford Focus discussion forums and chat with local Focus enthusiasts in your area.