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Tribune News Service
Tribune News Service
Business
Bob Weber

Motormouth: Follow the instructions

Q: You recently advised to follow the owner’s manual in choosing a grade of gas. Does that advice still hold if the manual says regular is fine but, for reasons long forgotten, the owner has been pumping nothing but mid-grade over the car’s entire 17-year life? If it matters, the car is an RX330 with about 120,000 miles.

W. K., Lake Geneva, Wisconsin

A: The only harm you have done is to your wallet.

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