Re: fuel mileage k5 blazer guys?
My '78 Jimmy with 400, th350, np203 and 4.10 gears on 265/75-16's get in the neighborhood of 12 mpg. I try not to calculate it too often as it causes days of depression any time I do. I prefer to check it in smiles per gallon  which is much higher
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1978 GMC Jimmy, 400, th350, np203 with part time conversion, Fibrecraft popup camper, soon to get a 14 bolt/d44 swap
2001 Yukon XL2500, 6.0, 4L85E, 4x4, family truckster
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