When decerlerating staying in gear uses no gas - so coasting to a stop uses more fuel.

My personal best is 404 miles in a single tank using 11.511 gal for an ave. mpg of 35.10.

https://www.s2ki.com/forums/index.php?showt...&#entry13736168

 

I get 28-31 mpg DD the car like a normal small 4 cylinder car shifting at 5k or less.

 

"Featherfoot" is MPG king

 

Best way to not use fuel is to never stop - getting 3,000 lb moving consumes the most fuel, so if you can glide between red lights you will use a lot less gas, no matter what else you do.

 

I calculate my MPG all the time to and am getting between 24-32MPG depending on how aggressive I drive and hwy vs. city usage.

I notices that even when I drive pretty hard and do it mostly in the city I still get around 23+MPG. We should be very happy with that because you won't get that in a Mustang, 350Z, RX8 or G35*. I know many people that have these cars and avg the mid teens when they drive aggressive. That's what is great about the S2k, you can drive fast and still get reasonable MPG. .

*I'm sure they could hit there EPA hwy claims at times but who drives a sports car that easy. In short the S2k performs on the same level as the listed cars but gets better real world MPG. If you only look at the EPA listings for all of these cars you probably wouldn't think the S2k is much more efficiant but in the real world, being driven like a sports car should be driven it does.

 

i got 32 mpg coming back from temecula (1st time with car). up I-5 (some mountain terrain) to HWY- 99 (flat road basically) doing 72 mph an occasion run up to 100 mph trying to catch up to my uncle.

i live 2 miles from work, car does really get to fully warm up by the time i get to work. i get 21-24 mpg usually.

for hypermiling (i think thats the term), i found that the best legal and safest route is to decelerate in gear to lights, accelerate to 3.5 then shift (helps with not bogging the car down). there is also this other technique in which when at freeway speeds you accelerate up lets say to 80, let off the gas, and let the car drop down to 70, and repeat. in experiments with my crx (88 crx si), i was able to get 49 MPG on a tired 200K motor.

 

Ive learned that it all depends. Coasting with foot off throttle burns 0 gas, but it also slows down your car..which means you have to step on the throttle again to move it, which burns gas. coasting in neutral = burns little gas, but it will coast a lot longer than with your foot off the throttle.

low RPM shifts will allow you to spin the engine less = less gas, but if youre stepping on the throttle HARD, the tb will open up = more air = more gas.
The 'sweet'spot of the car will probbaly be the best to shift at...but who will know what that is, unless you have a dyno that you can 'criuse control' @ a certain rpm/fill up gas to top afte3r.


the BEST way to save gas though, imho, is to just drive slower/calmer, dont jackrabbit start/slam brakes to stop. Time everything correctly and dont step on the throttle too hard.

 

the savings from deceleration is minimal to make a pronounced effect.

the best way to increase mpg is the accelerate VERY slowly (not necessarily shifting at a low rpm - which is also correlated with downshifting to accelerate [again, slowly]. in addition, obviously to coast at a high gear when maintaining speed.

 

I'd also like to add that breathing mods gets you more gas. Most people have at least an intake... while my car is completely stock --> 20mpg average going up and down the hills of Westwood. =(

 

I agree. Its weird.