5-20 synthetic blend, and it's more expensive and they'll try and talk U out
of it, even though the manual AND FILLER CAP says to use 5-20. And, unless
you watch them put it in, you've no clue that they are putting the cheap
stuff in, so beware.
Pure synthetic blend oils (like Mobile 1) are fab and with a good filter,
I'd go 15k on a change with easy driving without hesitation (which I plan to
do when the warranty is up...maybe ;-)
"Just drive, baby"
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