1999 ford Taurus lx

Asked by Astre_192305 Feb 20, 2017 at 12:22 AM about the Ford Taurus X

Question type: Maintenance & Repair

What should my rpms be while driving 70 mph on
interstate .

2 Answers
101,515

KenF answered 7 years ago

You can calculate what it your RPM should be, but you'll need some info from your car. Go here: https://www.ringpinion.com/calculators/Calc_RPM.aspx , then pull your axle ratio from any online VIN decoder, go to "tech specs" and find your overdrive ratio. You'll also need your tire size, which you can also find under the VIN decoder if it's still stock. Plug those numbers in and you can get what your engine RPM will be at any given speed.

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