Beating the EPA - The Why’s and how to Hypermile. - CleanMPG Forums

 

thats right show them the real useful info!

 

The AT does cut fuel. It's neat watching my ScanGauge to go 9999mpg and 0.00 gallons per hour when I'm coasting in gear. Fuel usually starts again at about 1krpm.


FAS = Forced Auto Stop. You can't do it in a Fit, as it doesn't have an Auto Stop feature. In a hybrid, and some newer VERY mild hybrids, this feature shuts off the engine when you stop, and very quickly starts it when you need to drive again. People who say they are using FAS in a car like the Fit are simply using the key to shut off and restart their engines manually.

P&G is a method of accelerating to a little higher speed than your target speed, then shifting to neutral and shutting off the engine to coast.


The FAS 'trick' probably isn't so bad on our cars, but I don't think the starter and battery are rated to handle dozens of starts and stops every day, however. The MOST I'd recommend doing at a stop is shifting to neutral. I have observed in my AT Fit that in Neutral with the AC off, it will use about 0.19-0.22 gallons per hour (GPH). In Drive with the AC on, it gets up to about 0.40GPH.

The P&G method, I think is dangerous and discourteous if you're anywhere close to other vehicles. The guy that coined 'hypermiling' will seriously pulse and glide down to 40mph on a freeway. That can get dangerous.


I DO highly recommend everyone who is concerned with fuel economy to get a ScanGauge. When you can SEE how your car is performing, you'll be a lot more conscious and active in exercising methods that will increase your economy.

 

i like this thread. here's another quandary; in the long run, is it worth all the wear on the tranny and/or clutch to coast in gear/down shift/engine brake just to save a few bucks at the pump when you fill up? also, which of the three techniques listed causes more wear approximately, and on which parts specifically?

 

I just started reading up on hypermiling and I'm currently on my first tank doing so. I drive a 2008 sport 5-speed and have been averaging prior to learning these techniques 34.5mpg with all-time high of 38mpg. I'm also having trouble determining what's best-neutral or in gear while gliding. I just ordered a scangauge, but so far I've had to play it by ear. It seems that although coasting in gear uses no fuel and coasting in neutral uses a small amount to keep the engine running, you still come out better by using neutral because you get a much longer distance out of your glide. Coasting in gear causes engine braking and shortens the length of your glide. So I guess it all depends on the conditions-for example: coasting to a stop (stop sign or traffic light) you should get better mpg by coasting in gear because you don't need the long glide due to having to stop. But if you are simply p&g down a street without stopping-neutral would be better to get longer glides. This is simply my opinion and I'm no expert (brand new to this). Can't wait to get that scangauge plugged in so I can pass 40mpg!

 

from 1500 to 3500, being in gear without throttle will shut off your injectors. although you have to take into consideration that idle barely uses any fuel and coasting in gear creates resistance. in racing, they say when you arent hitting the gas, you are breaking.

just dont turn off your car while you are rolling unless your car was meant to. its one thing to care about your mpg but its another to endanger others safety.