Originally Posted By: Quattro Pete
Originally Posted By: OVERKILL
Originally Posted By: Patman
Originally Posted By: Gene K
Is this the older 13.5 cSt oil or the new 12.8 cSt FS?
They both shear at 10-12% in 3,000-5,000 miles a DOHC 5.0 Ford with 0 Fuel.
After shearing this oil has thickened 30-40%. I think thats well past useful life.
It's the newest version of M1 0w40 that I bought from Walmart in the US, so it's the SN version (not the SM version that we had up here in Canada for quite a while after the SN formula came out in the US)
Considering how much this oil is thickening up I wonder if I might be better off switching this car over to GC 0w30 on it's next interval. It's too bad I don't have any of the good green stuff left from many years ago!
Do the bottles say "FS" on them? If so, that's the GTL version, which I don't believe has any PAO in it IIRC.
The oil went into his car in august of last year. I don't think FS was available then.
I think you are right, but wasn't sure when you guys started seeing the FS bottles