My 85 f150 4 speed strait 6 4×4 how are they on prolonged trips 2 to 3 thousand miles? At 55 to 60 mph??
4 Answers
The 300 straight 6 is an incredibly durable motor. At constant speeds, any engine will do well. At the speeds you mention, you won't be stressing it at all. I've been coast- to-coast with an Econoline equipped with a 300 six, full of family and pulling a trailer. I got 200,000 miles on a rebuild - enjoy! (of course, proper maintenance is key!)
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Gear to gear - there is no timing chain.
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In high gear and at 55 to 60 your engine's rpm will be slightly over twice that of idle speed. If the bed is not loaded down with stuff or pulling a trailer. You should have no problem. I'd change the oil prior to the trip if close to oil change time.
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