I think it would be fine if you keep the schedule the manual says but here is what I have always done. Maybe overdoing it but it makes me feel warm and fuzzy. Every 30k all fluids including transmission, power steering, brake fluid. Also check the cabin air and air filter and replace if necessary. Just drain and fills minus the brake fluid where I flush and bleed. Every other 30 I change the plugs and inspect the wires. In addition I clean the throttle body yearly. Coolant I would do every 3 years Like I said, maybe overdoing it but both my higher mileage vehicles run just as well as the day I purchased them.