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Originally Posted by Kent1566
For me the SAE sticker is the important part...now the rating is SN ( i think ) for conventional oils..so i shop @ Sears for $2.75 bucks a quart( SAE S/N rated )..A big part of motor oils is marketing , don't be fooled.
In my 99 2.7 Trep I keep the coolant changed,filters new,pcv and other stuff up to date..and go 4000 on conventional oil ..
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There's nothing wrong with that. Yes, SN is the latest and can actually be marketed
as semi-synthetic as the manufacturers had to blend in some synthetic to meet that spec.
In my mind there's non-syn and synthetic ,,, buying a semi-syn is a waste of money.
I don't want to sway this thread but watch " ANY " consumption of coolant in a 2.7
I know from personal experience , address it immediately.