Engine MPG
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Joined: Aug 1999
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Engine MPG
I have a choice between which engine I can put in my truck I was wondering what would a 78' F150 with a automatic get for gas mileage if it had 360, 390, 351m, and 400m in it? Also what is the horse power and torque rating of these four engines?Also what is the most reliable engine of the four?
Fleet Mechanic
Joined: Jul 1999
Posts: 1,360
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From: Iowa
Engine MPG
I have a '70 F100 with a 390 C6, 3.50 gears, and a two barrel carb. My truck weighs 4100 lbs with a full tank of gas. It gets eight to 15 miles per gallon, depending on what I'm doing. Reliability? In the 80,000 miles I've owned it(for a total of 160,000 miles), I've replaced the timing gears and chain, camshaft(due to timing chain and nylon gears), two burnt exhaust valves, 56 spark plugs, three wire sets, 40 gallons of oil, and 32 oil filters. I think it's pretty reliable!
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