# Better MPG... **URL:** \ **Category:** NYSpeed Automotive\ **Created:** [July 19, 2008, 8:05am UTC](https://forums.speedlife.net/t/better-mpg/51760 "2008-07-19T08:05:07Z")\ **Posts on this page:** 17\ **Page:** 1
**Author:** ![snowracer101](https://avatars.discourse-cdn.com/v4/letter/s/258eb7/32.png) [@snowracer101](https://forums.speedlife.net/u/snowracer101)\ **Post date:** [July 19, 2008, 8:05am UTC](https://forums.speedlife.net/t/better-mpg/51760/1 "2008-07-19T08:05:07Z")
This may be a dumb question. But when accelerating up a hill or from a light, what will net better mpg in a turbocharged car: 1: Accelerate with a light foot but take revs up to 3.5-4K then shift or: 2: Accelerate with a heavier foot but short shift at 2.5K. discuss ---
**Author:** ![OfficerK](https://avatars.discourse-cdn.com/v4/letter/o/4da419/32.png) [@OfficerK](https://forums.speedlife.net/u/OfficerK)\ **Post date:** [July 19, 2008, 8:11am UTC](https://forums.speedlife.net/t/better-mpg/51760/2 "2008-07-19T08:11:26Z")
1. Accelerate with a light foot to 2.5k then shift. ---
**Author:** ![Bigairskier1580](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/bigairskier1580/32/7612_2.png) [@Bigairskier1580](https://forums.speedlife.net/u/Bigairskier1580)\ **Post date:** [July 19, 2008, 8:34am UTC](https://forums.speedlife.net/t/better-mpg/51760/3 "2008-07-19T08:34:10Z")
With no technical proof to back it up, I’d say #1. Increased boost = greatly increased air which increases fuel. ---
**Author:** ![Paulo](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/paulo/32/7328_2.png) [@Paulo](https://forums.speedlife.net/u/Paulo)\ **Post date:** [July 19, 2008, 8:37am UTC](https://forums.speedlife.net/t/better-mpg/51760/4 "2008-07-19T08:37:32Z")
> [@Bigairskier1580](#): > > With no technical proof to back it up, I’d say #1. Increased boost = greatly increased air which increases fuel. getting into boost will almost always take down MPG’s. Revving higher in general will usually yield the same results. A lot of it depends on where your particular engine is most efficient. ---
**Author:** ![jetta4life](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/jetta4life/32/7368_2.png) [@jetta4life](https://forums.speedlife.net/u/jetta4life)\ **Post date:** [July 19, 2008, 8:55am UTC](https://forums.speedlife.net/t/better-mpg/51760/5 "2008-07-19T08:55:01Z")
where does it spool up? where does the next gear start you at? ---
**Author:** ![BluBalls](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/bluballs/32/7212_2.png) [@BluBalls](https://forums.speedlife.net/u/BluBalls)\ **Post date:** [July 19, 2008, 9:17am UTC](https://forums.speedlife.net/t/better-mpg/51760/6 "2008-07-19T09:17:01Z")
just drive around the hill. ---
**Author:** ![Bacon](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/bacon/32/7230_2.png) [@Bacon](https://forums.speedlife.net/u/Bacon)\ **Post date:** [July 19, 2008, 9:35am UTC](https://forums.speedlife.net/t/better-mpg/51760/7 "2008-07-19T09:35:35Z")
> [@OfficerK](#): > > 1. Accelerate with a light foot to 2.5k then shift. Ding. ---
**Author:** ![snowracer101](https://avatars.discourse-cdn.com/v4/letter/s/258eb7/32.png) [@snowracer101](https://forums.speedlife.net/u/snowracer101)\ **Post date:** [July 20, 2008, 4:09pm UTC](https://forums.speedlife.net/t/better-mpg/51760/8 "2008-07-20T16:09:42Z")
I’m not asking what I should do to get better mpg. I’m asking out of those two options, what would net better mpgs? with a light foot, even with a small ass turbo on the wrx, it still doesn’t get out of vacuum. with a heavier foot, you are getting into boost (maybe 3-4 psi) but you would be shifting sooner, so less RPMS ---
**Author:** ![ILCisDEAD](https://avatars.discourse-cdn.com/v4/letter/i/a87d85/32.png) [@ILCisDEAD](https://forums.speedlife.net/u/ILCisDEAD)\ **Post date:** [July 20, 2008, 4:12pm UTC](https://forums.speedlife.net/t/better-mpg/51760/9 "2008-07-20T16:12:26Z")
But number 2 you would have that wide open, I believe it would be dumping more fuel into the motor, IE running it rich. Where as the first one it would be a higher A/F ratio running a little leaner… #1 would probably be better. I guess it kind of matter what you consider light and heavy foot. light as in 25% throttle, and heavy 100%? or 75% ??? ---
**Author:** ![deebo](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/deebo/32/5218_2.png) [@deebo](https://forums.speedlife.net/u/deebo)\ **Post date:** [July 20, 2008, 4:56pm UTC](https://forums.speedlife.net/t/better-mpg/51760/10 "2008-07-20T16:56:27Z")
i thought 08 wrx dont boost till 2800rpm? so you should probably just shift before then ---
**Author:** ![snowracer101](https://avatars.discourse-cdn.com/v4/letter/s/258eb7/32.png) [@snowracer101](https://forums.speedlife.net/u/snowracer101)\ **Post date:** [July 20, 2008, 5:06pm UTC](https://forums.speedlife.net/t/better-mpg/51760/11 "2008-07-20T17:06:45Z")
> [@ILCisDEAD](#): > > But number 2 you would have that wide open, I believe it would be dumping more fuel into the motor, IE running it rich. Where as the first one it would be a higher A/F ratio running a little leaner… > > #1 would probably be better. > > I guess it kind of matter what you consider light and heavy foot. light as in 25% throttle, and heavy 100%? or 75% ??? light would be about 25% and heavy would be 75%. #1 and #2 would be accelerating at the same speed, just different ways. guess the only way to figure it out would be to test both. ---
**Author:** ![ILCisDEAD](https://avatars.discourse-cdn.com/v4/letter/i/a87d85/32.png) [@ILCisDEAD](https://forums.speedlife.net/u/ILCisDEAD)\ **Post date:** [July 20, 2008, 5:17pm UTC](https://forums.speedlife.net/t/better-mpg/51760/12 "2008-07-20T17:17:48Z")
oh at the same accelerations… #2 would just be terrible inefficient ---
**Author:** ![carl5463729](https://avatars.discourse-cdn.com/v4/letter/c/ecae2f/32.png) [@carl5463729](https://forums.speedlife.net/u/carl5463729)\ **Post date:** [July 24, 2008, 4:33am UTC](https://forums.speedlife.net/t/better-mpg/51760/13 "2008-07-24T04:33:34Z")
how often do u go up hills? ---
**Author:** ![justa4door](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/justa4door/32/7259_2.png) [@justa4door](https://forums.speedlife.net/u/justa4door)\ **Post date:** [July 24, 2008, 5:08am UTC](https://forums.speedlife.net/t/better-mpg/51760/14 "2008-07-24T05:08:01Z")
man with light foot is … (ok i dont have anything) but all in all less WOT is better i try to keep my car 25% TPS i dont think i have gone 100% TPS in a long time ---
**Author:** ![Bigairskier1580](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/bigairskier1580/32/7612_2.png) [@Bigairskier1580](https://forums.speedlife.net/u/Bigairskier1580)\ **Post date:** [July 24, 2008, 5:14am UTC](https://forums.speedlife.net/t/better-mpg/51760/15 "2008-07-24T05:14:54Z")
> [@95LS1t](#): > > i thought 08 wrx dont boost till 2800rpm? so you should probably just shift before then That is likely when it hits full boost under full throttle. ---
**Author:** ![chino](https://avatars.discourse-cdn.com/v4/letter/c/bcef8e/32.png) [@chino](https://forums.speedlife.net/u/chino)\ **Post date:** [July 24, 2008, 5:53am UTC](https://forums.speedlife.net/t/better-mpg/51760/16 "2008-07-24T05:53:24Z")
best gas mileage going up a hill would be to bury the speedo before the hill and coast up it. ---
**Author:** ![theblue](https://yyz2.discourse-cdn.com/flex034/user_avatar/forums.speedlife.net/theblue/32/5074_2.png) [@theblue](https://forums.speedlife.net/u/theblue)\ **Post date:** [July 24, 2008, 5:58am UTC](https://forums.speedlife.net/t/better-mpg/51760/17 "2008-07-24T05:58:22Z")
your on a hill so you’re under a lot of load so you’ll boost very quickly… the answer I would go with is that you should accelerate until you can shift into the next gear comfortably and this might involve some boost. If you shift too soon you’re just robbing peter to pay paul.