6.0 swap nbs rcsb, will it kill my gas mileage?
06-03-2014, 10:59 PM
#11
Mine got worse and now I run 93 octane. I have a T56 with 4.56 gears though. 4.8 got 15.5mpg, 6.0 gets 13mpg. I have a big cam with 11:1 compression though. It does run wayyyyyyy better though, especially on spray.
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