Destiny2002

For flat highway terrain, a constant speed at the speed limit is probably most efficient. Going slower than the speed limit is stupid, going faster than 55/65 MPH is going to lower your fuel economy.

For hilly terrain, a constant speed does not get you the best fuel economy. You want to gain speed going down hills, best accomplished with foot off the accelerator and in gear until the bottom of the hill, then gently get on it and go about 10MPH over the speed limit before starting up the incline. Then going up the hill, let your car lose 10-20 MPH while giving it constant throttle.

Running cruise control on hilly terrain is not as economical as you might think.

VinceD

[QUOTE]Originally posted by offroadr35
[B]what speed have you all figured you get the best gas milage at?

wicky

VinceD - I thought I was doing good just to increase my mileage from 160 to a tank to 180. 300!?!?!

The Gasman

The reason that the double nickel was instituted in the first place was that some study showed that it was the most fuel efficient speed. Of course that was probably done with the cars of the 70's and no I don't know if there is a good current correlation. The way to squeeze more mileage out of the s2000 has been stated in this post. Putting it together.

1. Make sure you have proper inflation in your tires! Changing seasons means that the winter could have robbed your tires and you need to top them off (always do a cold check).

2. Drive the car unlike it is intented---ie like you would a daily driver civic...get through the gears quickly at as low rpm's as possible.

3. Lower the rate you accelerate at (don't try for those 13.-14 second quarter miles), accelerate smoothly and slowly.

4. Keep your top up and use the air conditioning. At speeds about greater than 60 mph the drag from the convo or even the window's down is more fuel stealing than running the a/c.

5. Keep the car well waxed (obvious reasons)

6. Lower your cruising speeds, anticipate stops and slow down earlier for stops.

7. Use cruise control..by keeping your speeds constant (even on hilly terrain) you lower your fuel comsumption.


All of these will get you alot of mileage. When my car was a daily driver I got 320 miles in mixed driving from a tank. Driving this way can get you alot of mileage, but also is guarenteed to BORE YOU TO DEATH!

I have a new solution now. I drive my beater 30mpg 87octane gas daily and drive the s2000 for fun!

FCGuy

[QUOTE]Originally posted by SanchothePanda
[B]As for best speed for gas mileage... it really should have nothing to do with the actualy speed you're traveling, but how much gas you're using (read: RPM's) the higher the rpm's, the faster the engine is turning, the more little squirts of gas that are being used up.

1FastS2k

I do ALOT of highway driving and have found that basically if I keep it under 4k rpm I get decent mpg. Cruising @ about 75, I get around 30 mpg, cruising @ about 85 I get around 25 mpg. For what it's worth, these are only my observations and have no scientific proof. I have found that tire pressure does play a big role in gas mileage.

MattDell

But when you're going 0, you're getting the worst mpg.. you're not getting any miles! I know you said the car was off, but someone had to say it.





-Matt

Destiny2002

The better question is: What's the best speed for smiles per gallon?