worf wrote: ↑Mon Feb 13, 2023 11:04 pm
The newest is 0w-40 x3 which has "C40" Porsche spec. The A40 oil is only for use in pre-'20 Porsches. The C40 is only for use in '21+ Porsches. The difference is that the '21+ Porsches have the GPF matrix and the C40 is required so as not to gum it up but C40 is not approved for the older Porsches.
Yeah, I remember reading about this stuff on the old board back after I got my 992. Quoting a post from over there from 992Sam on why the 992 uses C40 oil:
So I did a lot (and I mean a lot) of digging on this.... the reason revolves around two things.. LSPI (low speed pre ignition) and reduction of calcium detergents in the C40 spec which has been shown to increase LSPI, as well as due to the new spec oil having a better evaporation performance which then prevents oil gasses being sent back thru the PCV into the intake and carbon building up on said valves.
Of course, when I bought my 992, this oil was impossible to find in the USA. And when I went in for my first oil change and asked the service manager if they were using the C40 stuff, he had no idea what it even was and just told me, "We use whatever Porsche gives us."
I just recently bought a quart of Mobil1 without thinking about the C40 rating so I'm not even sure which one I got. I actually bought it for my Raptor. The Gen 3 Raptor calls for MotorCraft Fully Synthetic oil. And, guess what? It's impossible to fucking find. So I figured if Mobil 1 is good enough for Porsche, it'll do just fine in my Raptor if I need to add some oil.
"God, grant me the serenity to accept the things I cannot change, the courage to change the things I can, and the wisdom to know the difference." - A tattoo I once saw on some stripper's ass cheek.