Without doing a used oil analysis (UOA) on a particular engine running a particular oil, I do not buy into generalizations. Different oils (synthetic or conventional) shear at different rates in a given engine and break down the TBN count at different rates. All vehicles do not show a MPG increase just by using synthetic oil.
Bottom line is that synthetic oil is not going to hurt an engine, but a dino oil may give plenty of protection for that same engine at a substantially lower cost. UOAs will tell the tale.
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2013 Cadillac ATS Performance, 3.6L
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Formerly:
2012 GT Automatic, Kona Blue w/Stone interior
The usual exhaust mods, JLT CAI, Brenspeed tune, BMR LCAs
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