66K Is it too late to go full synthetic?

mike444

I know I know, the oil threads are dreaded here. I have used that magical search button my fellow z owners, and to no avail for my question(s).

I see an ad for Pennzoil platinum which seems to get positive reviews here for $32.99 w/ k&m filter and $1.00 savings per gallon of shell fuel(check into that guys). What I want to know is, is it to late to switch over to "full" synthetic, or should I be using high milage oil like Valvoline MaxLife Synthetic ( I think thats what was put it before).

Facts: I'm the 2nd owner and from 15,800 miles onward I have used conventional oil, until my last change which I'm 80% sure was the valvoline listed above.


And since were here, already if anyone has suggestions on what else I should do at this point to maintain my lovely aging 370z, they are welcomed. Ex. If/ what spark plugs I should buy. If/what tranny fluid I should buy, and anything else.
*I can't really afford the super fancy schmancy products but a happy medium of proven products have always done me good.


I'll be checking in periodically but just incase thank you!