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What can we do to get the most MPG of our engines?
change spark plugs, wires, cap and rotor, fuel filter, clean air filter, oil changes every 3kmi or every 3 months stuff like that
 

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Do the speed limit. As such as I hate to say it it will get you better mpg.s while keeping the rpms in check. I honestly hope my new engine does less downshifting because if these engines are that weak were your are constantly downshifting then I can't see how they can be good high mpg cars?? I guess I will see...
 

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I have a 99 GXE with the 1.6 and auto tranny. I have lightweight 15" wheels, K&N filter, good plugs, cap, rotor,O2 sensor, 5W30 synthetic oil, pop into nuetral going down hill or decelerating, nuetral while idling, turn A/C off whenever accelerating, keeping the speed down, accelerate gradually, add a bit of acetone to the fuel (2oz per 10Gal), don't use a short ram intake to suck in hot engine bay air, and for a 5 speed I highly recommend an aluminumm flywheel. All of my CRXs have had them, and my current DOHC CRX has one and gets 38mpg when flogging it. Getting a Scan Gauge 2 will also tell you what MPG you're getting.
 

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Increasing intake temps actually helps improve mileage while cruising since the air is less dense and requires less fuel to get the air/fuel ratio the ECU is looking for.
 

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Just wanted to add, my car with AT gets around 30MPG city and that's WITH gunning it from every light in stop and go traffic.
 

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I have a 98 200sx 1.6 auto w/ a short ram intake, 2 1/4 cat back, 1.9in drop. With a/c on, I get right at 20mpg delivering pizza. I get about 25mpg with no a/c.
 

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29mpg, header, 2" cat back, WAI, Orthodox UD pulley, ACT heavy duty clutch, Moble 1 5w-30, poor alignment, bad lower control arm bushings responsible for dynamic toe changes (which kills gas millage).

I get 29MPG in both the city and the highway, 80mph for 5hr on the highway, heavy foot running up 2 4k RPM in city.
 

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I have a 99 GXE with the 1.6 and auto tranny. I have lightweight 15" wheels, K&N filter, good plugs, cap, rotor,O2 sensor, 5W30 synthetic oil, pop into nuetral going down hill or decelerating, nuetral while idling, turn A/C off whenever accelerating, keeping the speed down, accelerate gradually, add a bit of acetone to the fuel (2oz per 10Gal), don't use a short ram intake to suck in hot engine bay air, and for a 5 speed I highly recommend an aluminumm flywheel. All of my CRXs have had them, and my current DOHC CRX has one and gets 38mpg when flogging it. Getting a Scan Gauge 2 will also tell you what MPG you're getting.
What does the acetone do?
 

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They say that acetone will increase the octain value of the fuel that you use. As a matter of fact I think I might have read that somwhear many years ago. There are guy's that are running high compression muscle cars that try to eliminate ping by using it....
 

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The acetone is supposed to reduce the surface tension of the fuel making it more efficient to vaporize out the injectors and is supposed to clean up some of the engine deposits. I noticed a difference in pep, but don't know if it was the acetone or the new spark plugs since I started doing this after a tune up.
 

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I am very interested and have heard from others that this will help. Where are you getting it and are you buying in volume?
 

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Make sure you're running the proper air pressure in your tires. Running improper psi will effect your mpg. For those of you with older and/or higher mileage vehicles, try this:AMSOIL - P.i. Performance Improver (API). Testing showed that this product has improved fuel mileage an average of 2.3% and up to 5.7%.
 

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I started with 3 oz per tank initially, then dropped to 2 oz per tank. I got 26-27 mpg, then started getting 30-33mpg. I got my bottle of pure acetone from CVS in the makeup isle. I did some research before doing this, and figured my Sentra would be the test mule. Now I use AC all the time it's dropped from 33 to 30 mpg but beter than 26. No sputtering or adverse affects as I can tell.
Directory:Acetone:Sentra - PESWiki
 
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