Posted by Steve@Advance on November 05, 2021 at 10:42:44 from (99.190.215.237):
In Reply to: oil question posted by Charlie M on November 05, 2021 at 08:05:14:
I don't see where it would hurt.
Back in the very early days of synthetic oil, they said not to mix them, but when changing oil, you never get all the old oil out, so there would always be some mixing unless you were starting with a fresh, empty engine.
I prefer synthetic. Synthetic is just a better way to get the oil to do exactly what it is designed to do for a specific application.
And yes, it would be possible to dissolve a lot of carbon and sludge, but that is more an issue with going from non detergent to detergent. But after a few oil changes that should stabilize. A severely sludged engine is also a symptom of a severely worn engine, so anything that happens could have been destined to happen anyway, regardless of the oil used.
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