Type: Posts; User: Sheep3
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Poorer fuel quality in especially recent years is one of biggest contributors to lower fuel mileage... and it gets worse as temps drop! Ethanol blends hurt, not help. Do not "oversize" your...
Basically nothing from the new gen LS small block swaps to the old SBC series (265-400ci).
To correct some of info above, and I have a 2011 Sierra 2wd shortbed reg cab with the LMG 5.3L engine (cast iron, VVT, flex fuel with 6L80 trans)
These late models with this engine with 9.5-1 CR...
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