A woman I know got a 1988 Cadillac Sedan Deville from her grand father early in the summer, It's in excellent shape and has low milage on it. I recently found out she was using regular gas instead of the recommended Premium gas. She did it save money.
I told her she needs to use Premium from now on.
She wants to know if she done any damage to her engine? She says it's sluggish.
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