Gas mileage vs rpm observations

[logres]

Just out of curiosity, I checked my mileage in several gears while cruising at 75. I was using cruise control on a level freeway. Stock 3.07 gearing.

4th gear - 28mpg (~2000 rpms)
3rd gear - 21mpg (~3000 rpms)
2nd gear - 14mpg (~5000 rpms)

My TC was locked in all gears, so there was zero slippage.

 

[junkman306]

That's neat. I've noticed on every car that I've owned, I get the best mileage if I stay under 2,000 rpms.

 

[maxmk8]

Yep... so if you go from 3.07 to 4.10s you can expect to see something similar to 28mpg to 21mpg

 

[driller]

Yep... so if you go from 3.07 to 4.10s you can expect to see something similar to 28mpg to 21mpg

Not really, I can get 23 mpg highway at 75 mph with 4.30s.

 

[logres]

Not really, I can get 23 mpg highway at 75 mph with 4.30s.

JP...we're not talking about Mark's whose only remaining stock parts are the spare tire and steering wheel. ;p

 

[driller]

JP...we're not talking about Mark's whose only remaining stock parts are the spare tire and steering wheel. ;p

Hey, don't forget the floor mats, they're stock.