11.5 mpg average is that normal?

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Oct 2, 2009 | 05:56 PM

#21

AKlowriderZ71

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There ya go! Heavy foot.

Oct 3, 2009 | 01:49 PM

#22

fastnblu

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Quote:

Originally Posted by 007gmc

rcsb 06 gmc 6.0 longtubes, maganaflow cat back, intake, 4.10 gear rest is all stock. i average about 11.5 mpg every tank i drive around 40 mph in town short 5-15 minute drives might get on the highway once or twice per tank. anyone else get this bad mpg in a rcsb 2wd truck?

Could be the heavy foot, 6L, the 4.10 gears, or short trips. Or all of em.

00ChevyScott, a clogged IGF valve.

?

trever1t, u dont get much better, maybe 12.5 city driving if really babied?
Deal w/. it; u run 11's.

Quote:

Originally Posted by dlt76028

i just averaged 19mpg, 50/50 mix driving

That's great. Is that a 6L?

Quote:

Originally Posted by Coban

Taking short trips will kill your gas mileage. I think its the after-start enrichment function of the ECM. Might also need a better tune in general.

Quote:

Originally Posted by 007gmc

my afr is right around 14.7 part throttle. i run 24 psi in my rears and 40 psi in my front tires. i do have a heavy foot with it when taking off most of the time.

Why the different pressures?