Dave

I get 28-32 on the highway, doing 75-80 mph. most engines like 3000 to 3500 for cruising (a gas engine for marine use doesn't go by miles, but by rpm, cruise is typically shown as 32-3500 rpm)

Deni, When above 10 mph, that gauge is read as MPG and uses the top numbers, below 10 mph it is read in gph and uses the "0.5" and "1" on the bottom. 25 to 30 gph @ 80 mph = 3 mpg, if this reflects your actual fuel usage, get it out of second gear!

deni durrell

actually i'm not sure how that stupid gallons per hour (or MPG) thing works, but i did want to add that it's in between 20-30 at 80 mph going 2900 rpm in fifth gear. had to add that. perhaps i should invest in an owner's manual. there are too many goddanm things that i am having to learn the hard way.

scular

I've found my car likes it just above 3000 rpm. And at the gas pump I have been getting between 26-32mpg. I don't know with the 944, but on one of my previous cars after 3100 rpm the computer actually began using the O2 and other sensor readings to make the car run optimally.

newoldguy

I've always believed that you would get your best mpg at the point that maximum torque is being produced at the lowest rpm possible. Therefore, consulting my trusty owner's manual, it looks to me like it would be at about 2,800 rpms for both the 944 and 944S whereas the turbo looks like it might be at about 3,500 rpm. My car (944) feels just right at about 80 and 3,000 rpm.

Marcus

Try doing a 100 mile motorway drive with the space saver spare on at about 50 mph. It's great for gas mileage but you don't half lose the will to live. Got about 40 mpg.

I have done a 450 mile trip this weekend. 400 or so on motorway at between 80-100 mph, and rest in central London traffic. Overall average is 30 mpg imperial.

Cheers,

Rog

I'm with newoldguy.

You can't well generalize across cars, a fixed speed. Running near the bottom (rpm-wise) of the torque peak will work for most any motor. A bit less than that for truly high-rev/peaky motors. That's where the motor is, by definition, the near peak efficiency. I've not done an easy full highway drive right at 80, but I have done a several where I was steady at just above 70, and a couple _fairly_ steady around 90, and they both got around 24mpg. I'm fairly certain it would be more like 26-28 if I was truly steady at 75-80. Anyway, the original poster's figures sound about right, as did all the comments about it having a lot to do with driving style and keeping off the gas/brakes when you are cruising.

Believe it or not, the mileage does matter to me.
If I want speed, I hope on to a motorcycle (even a 25 year old one) and can run faster than a 944NA.)

later
roger
944na 4000S various (6) beemers, duc, goose

JB '87 944

I agree with NewOldGuy...the car feels right at 2800 RPM...somewhat effortless...any more speed and you know it's starting to work. Thanks for all the answers posted!