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Old 10-09-2011, 12:09 AM   #1
SimonSellsAustin
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Arrow What have you done to increase MPG?

I'm considering doing a few mods like Ram air, remove the second muffler and possibly and underbelly pan. Comments, suggestions=?


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Old 10-09-2011, 12:19 AM   #2
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underbelly pan would be negligible I think... the whole front end of the car is pretty much covered, and the rest is pretty well designed.

might as well go with a short-ram or cold air intake if youre gonna plan on modifying the setup at all, will probably net you better increase anyway, just my .02.
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Old 10-09-2011, 12:33 AM   #3
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Premium gasoline has netted me around 3mpgs more a gallon.
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Old 10-09-2011, 12:42 AM   #4
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Quote:
Originally Posted by Ox-y-GenIII View Post
Premium gasoline has netted me around 3mpgs more a gallon.
Contrary to that, premium gasoline net me about 3mpg less a gallon when I ran it. I've switched back to 87 and now see better fuel economy.
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Old 10-09-2011, 12:59 AM   #5
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The BEST way to increase fuel economy is to learn your car, find where it likes to be for the best mileage, and keep it there. How you drive will impact fuel economy so much more then any add on...especially one that you pay $100+ for...it's going to take a LONG time to recoup those costs with the rather small gains you may or may not see.
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Old 03-17-2014, 06:21 PM   #6
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I spoke to a retired Ford mechanic who told me his factory training told them to advise owners to never use premium in a Zetec. FWIW
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Old 03-19-2014, 02:17 PM   #7
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Quote:
Originally Posted by Doctor_Leaky View Post
I spoke to a retired Ford mechanic who told me his factory training told them to advise owners to never use premium in a Zetec. FWIW
Not buying it ... High compression engines are going to have more power and be more efficient with higher octane gas. I run only premium in my 2013 Ti HB and my lifetime average is 38.5mpg at over 31K miles.

In Fords own literature they indicate more horse power with premium gas in there performance engines. Top gear did a show on this and verified a power increase using premium for some but not all cars.

An engine with 12:1 compression is going to prefer higher octane gas.


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Old 03-19-2014, 04:43 PM   #8
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Thanks for he response; the retired mechanic told me the 2005 engine in my car was a low compression long-stroke engine with 10:1 or less compression ratio - again, FWIW
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Old 10-09-2011, 01:17 AM   #9
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Quote:
Originally Posted by Ox-y-GenIII View Post
Premium gasoline has netted me around 3mpgs more a gallon.
I've switched back and forth... I've gotten mixed results.. I need to do more testing before I can verify the increase.
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Old 10-09-2011, 01:50 AM   #10
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Mobil One Advanced Fuel Economy Oil 0W20. (available in some places for a five quart bottle for $23. instead of the $8 a quart..)
(Standard Motorcraft filter is fine)

Keep all window and roof closed on highway

Increase FRONT tires to 44psi (you will NOT even notice it over bumps.. but the car will corner better) the rear leave stock, or only one or two at most psi higher. If more you WILL be really feeling the wacks from the overly stiff tires.
This is assuming you have 17" or 16" wheels. I do NOT know what increasing the 18" tires would do...

Avoid streets with stop lights or stop signs. Every one you stop at cuts mpg drastically. Even if a longer route, if it has no stops, will be worth it.

If you are planning on buying wheels, the smoother the surface, the better the mpg. So five spoke are like the worst for churning the air. A nice smooth moon cover would be the best.
Covering the rear wheel openings is a big mileage gainer..
Lowering the car should also give some gain.

reset your stock mpg meter often. The meter will give tremendous insight into what adds to the mileage, and what kills it.
By resetting it, you let it change way more for small changes in the actual mpg being used.

With a manual tranny you absolutely want to be in the highest gear the car car be driven in at any time. For me fifth is good at 32mph.
If you have to go up a hill though, downshift!
(I think this is why the auto is said to get better mileage.. because most stick drivers cannot keep it in the lowest gear like an auto can.
And it has it's own rules to upshift. A person has to guess if it is best to downshift.

Slower is better. The best i can drive seems to be below 47mph. Which is just 2mph over the freeway legal lower limit of 45mph...
I like 35mph streets
I drive 55mph in the 65 freeways. have for a few years..
Really sllooooow starts from stoplights and signs.
(folks LOVE to jump off the line.. too bad.. The worst are idiots who are tailgating so close they panic when i shift, and the car slows down for a split second..)

Interesting how some folks will also slow down when i am on the freeway. like they do not have the guts to do it, but would if another is doing it..
Then tailgaters, i used to despise them, but now i find them to be helping me get better gas mileage, i do not hate them as much.
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