That doesn't matter a bit. Just run a good oil advertised as synthetic. This is something you may find out yourself by trying.Hi All
I like reading this site's info. I once worked in a bearing & lube research lab many, many many years ago.
Quick question: I have a 2004 Cadillac V-6. It's recommended that I use Mobile1. Did Mobile change change it's formulation from synthetic to mineral before or after 2004? I've Googled hi & low & can't find an answer. Also this car has 150K miles & is a cream puff. Is their any benefit to continuing w/ Mobile1? Or would I be better served by changing to a true synthetic? Is Cadillac's recommendation for it fact based or is it just a marketing ploy?
Much thanks
DO you use the max performance of the engine or is it driven modestly?
I would run Valvoline Advanced or the Mobil 1 or whatever suits your fancy.
Do you change you own oil?
I would think about transmission service if not performed, and stop worrying about the oil