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Q: does driving a car at 4000RPM with a limit of 8000 rpm cause harm, after the car is at operating tempurature?

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does driving a car at 4000RPM with a limit of 8000 rpm cause harm, after the car is at operating tempurature?

My car has 257400 miles.
My car has an automatic transmission.

A: It should not harm your engine to run it at...

It should not harm your engine to run it at 4000 rpm. With this high of miles, however, I would not run it for an extended time at these speeds. Especially since it’s an older engine.

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