I have two small SUV’s- Hyundai Tuscon and Toyota Rav4, purchased in four cylinders for fuel economy. However, on long highway trips, I’m afraid that maintaining a speed of 75 mph might be detrimental to the engines (3000 rpm). I’m FAR from the red, warning zone, but need I drive slower because of t…

Four cylinders at highway speeds

MikeInNH January 13, 2008, 11:58pm 10

If it were detrimental to the engines then my wifes Accords NEVER would have lasted 300k+ miles…and NOT buring ONE DROP OF OIL.