Synthetic oils do have some superior lubricating and wear qualities, but
they will accumulate impurities just as quickly as petroleum oils, (and
do eventually break down as well), so they still need to be changed as
regularly as any oil. They are 100% compatible with petroleum oils -
the warning that you can't go back is baseless.
Cheers, Jim
Steve Harvey wrote:
>
> Hi Tom,
> I have a syn. oil question. I recently purchased my father-in-laws 1994
> S-10 pickup. He told me that he only runs Mobil 1 oil and has never
> changed it!!!! He changes the filter every 3000 miles and tops off the
> oil level. This ofcourse scared the !~@#$% out of me. Is it true that
> you can't go from a syn. oil back to a real oil? Also, shouldn't even
> syn. oil be changed every 3000 miles?
> Thanks
> Steve Harvey
>
> >
> >
> >
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