Engine/Transmission (1994 - 1998) Better Mileage @ 2100rpm?

[osmith]

Last night I did a 3 hour drive on a four lane highway (2 lanes each way) I was travelling probably 130kms/hr @ 2100 rpm. Now I haven't done any refil and calculations yet but based on what they fuel guage shows me I swear that my truck got better mileage at this rpm than it usually does at say 1750 - 1800 rpm. Can this be right? From what I've read the most efficient rmp ranges are usually between 1600 and 1800.



comments anyone??

 

[BPINE]

Mine gets the best mileage at 2100 as well, especially while towing. It also seems to be the sweet spot as far as EGT's go as well.

 

[illflem]

My mpgs take a big dump over 2k

 

[PUMPERDUDE]

The best way IMO to get consistant mpg figures is to fill your tank all the way up the filler neck to where you can see it . Run your tank down and refill it to where you can see it again. Figure from there. I woundn't base anything on what that rinky dink fuel sending unit reads. I figured my mileage towing on a 2100 mile round trip to Virginia. On three 45-50 gallon fillups ,milage was 10. 79,10. 80 and 10. 84 mpg. Nothing to brag about but it was consistant . That was towing 9000 # TT @ 65-70 @2000 RPMs... . You learn to pay very close attention to your mileage when your fuel sending unit craps out. Running empty on the highway I get 20-21. Arround town 18 -19. Real numbers