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Is it Ever Too Late to Switch to Mobil 1?
When is it too late to change to Mobil 1 synthetic oil? I have a 2001 car with 27,000 miles; is it too late?
-- Dave Corrnwell, Jupiter, Fla.
It is never too late to change to a full synthetic motor oil like Mobil 1. Mobil 1 is fully compatible with conventional motor oils, semi-synthetic motor oils, and other synthetic motor oils, should it be necessary to mix them. But the advanced performance of Mobil 1 will be reduced by diluting it.