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Fleetwood · 10-13-2021, 07:28 PM

I think it's tough to go wrong with Amsoil Signature; if they don't have the factory approval, they're probably working on it. Many oils, depending on application, exceed the various approvals. I've run Amsoil products in the vehicles for which they're highly rated and approved (Blazer, 80 MB Diesel), and will run the 0W40 in my 22 2SS 1LE. The Mobil1 approved oil is also probably every bit as good as the nearest oil in the Mobil1 line, 0W40 FS, which I've run in the past in Porsches (it carries many Euro factory approvals).

10-13-2021, 07:28 PM	#21
Fleetwood Drives: 22 2SS 1LE; 21 Blazer; old stuff Join Date: Sep 2021 Location: Dearborn, MI Posts: 3	I think it's tough to go wrong with Amsoil Signature; if they don't have the factory approval, they're probably working on it. Many oils, depending on application, exceed the various approvals. I've run Amsoil products in the vehicles for which they're highly rated and approved (Blazer, 80 MB Diesel), and will run the 0W40 in my 22 2SS 1LE. The Mobil1 approved oil is also probably every bit as good as the nearest oil in the Mobil1 line, 0W40 FS, which I've run in the past in Porsches (it carries many Euro factory approvals). __________________ 2021 Blazer 2LT 3.6 1989 MB 300SE W126 1980 MB 300SD W116 1970 MB 280SE W108 1966 Cadillac Fleetwood Brougham 1939 Cadillac 60 Special Cadillac & MB Factory (un)trained tinkerer from long ago, now working on remote diagnostics & other nonsense. "Form is Emptiness, Emptiness is Form"