Synthetic oil is better.
Is it worth the money? Only you can decide that.
You can switch back if you want. I switch back and forth all the time on the same engine with no problems.
Change your oil when it gets dirty, usually around 3000 - 5000 miles weather its synthetic or not.
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2002 GT
1993 GT (SOLD)
'93 Mustang GT
RHC member #142
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