Quote:
Originally Posted by JL8Jeff
It depends on the car/truck, but my 454SS pickup got 14 mpg at 70 mph which was right in the perfect rpm range for the combo but would get 12-13 at lower speeds. The F-body get best gas mileage at 70-75 mph as well. 55 mph in an F-body is too low in the rpm range and will hurt gas mileage. A couple of my old 4Runners got best mileage in the 65-70 mph range so I don't think this 55 mph thing is accurate. With overdrive, almost all the new cars are geared for best cruising rpm around 65-70.
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14...matt hasnt seen 14 mpg in his truck since the last time it was towed by a vehicle that got 14 mpg lol
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EB
99 Riviera, Bone stock, 14.34 @ 96 "Walking 5.0's in luxury" RIP
95 Cherokee, Bone stock 16.2 @ 83 "Treeing your 3rd gen and beating it to the line despite trapping less....and looking better"
93 TA, Bone stock, 13.8 @ 100 "Beating ****** drivers in ****** LS1's"
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R.I.P. Tia 
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