Tom

Tom,

Q I was reading about your article regarding oil changes in automotive

engines at CNN.com and I have a question in regard to detergent and
nondetergent oil. I know that today’s automobile engines use nondetergent
oil. I have just recently rebuilt a 1955 Chris Craft boat with a flathead six-
cylinder carburetor engine, and I was advised that I should use nondetergent
motor oil in this engine. My question is: Why should I use a nondetergent
instead of a detergent oil, which I understand will keep the engine cleaner?

Thanks,