Amsoil Signature Series vs. Heavy Duty

You've been here since 2015 and you are asking this? Those are silly questions, facetious or disingenuous perhaps. You even imply Amsoil doesn't test.

Amsoil simply knows what the specifications are, tests above and beyond the specs. It's not that difficult to understand.

Certification really doesn't matter before warranty expires, if the oil meets the specifications. Plenty of the threads on this as well.
But think of all the Rotella skeptic 5w-40 Ford PSD customers Amsoil would have if they would submit for the certification they already know they would (hypothetically) pass. This is a business opportunity for them.
 
But think of all the Rotella skeptic 5w-40 Ford PSD customers Amsoil would have if they would submit for the certification they already know they would (hypothetically) pass. This is a business opportunity for them.
It's possible. But probably not. I've been an Amsoil Dealer for 25+ years, no one has ever asked for any auto oil specification. Never once. The above average consumer even - in the USA doesn't know or care about car manufacturer's oil specifications. Oh some might see API ratings, many will look at SAE viscosity grading. It's a bit sad, frankly in some ways I do wish GQ Public would educate.
 
It's possible. But probably not. I've been an Amsoil Dealer for 25+ years, no one has ever asked for any auto oil specification. Never once. The above average consumer even - in the USA doesn't know or care about car manufacturer's oil specifications. Oh some might see API ratings, many will look at SAE viscosity grading. It's a bit sad, frankly in some ways I do wish GQ Public would educate.
I'm not the only person that looks past the grade designation. People that come to you have already committed to buying an amsoil-reccomended-amsoil product, regardless of certifications, because marketed as better has already sold them. Those that care about a cert already know the answer and doesn't bother to call.

https://www.powerstroke.org/threads/amsoil-certification-response.1366675/

Post #8 ROFL. Tractor supply traveler branded oil is on the list.

1753204080945.webp
 
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"You are not required to use an oil from Ford's approved oil list, and Ford cannot deny warranty for using an oil that isn't on their approved oil list. The oil only needs to carry the correct Ford specification (WSS-M2C171-F1) and meet the correct viscosity requirements. AMSOIL will never be on a Ford approved oil list."

Well that's the dumbest response I've ever seen. So you are not required to use an oil from Ford's approved list, it just has to be an oil that carries their specification (which by default means it's on their approved list)? Um, ok....

I guess I will second guess this. Maybe I'll just keep driving around town looking for oil. Usually T6 shelves are bare, or maybe there's one gallon and that's it. So then I have to either buy another brand and mix, or drive to another store, and then the process continues. It gets annoying. I could order online, but usually it's more expensive. Wife and I don't shop at Sam's anymore...too far to drive and they have membership fees which are high.
 
"You are not required to use an oil from Ford's approved oil list, and Ford cannot deny warranty for using an oil that isn't on their approved oil list. The oil only needs to carry the correct Ford specification (WSS-M2C171-F1) and meet the correct viscosity requirements. AMSOIL will never be on a Ford approved oil list."

Well that's the dumbest response I've ever seen. So you are not required to use an oil from Ford's approved list, it just has to be an oil that carries their specification (which by default means it's on their approved list)? Um, ok....
I do think the response (if true) could have been better worded, but also you are misunderstanding their meaning of "carrying a specification." In Amsoil's case (I can't speak for HPL, Redline, Schaeffer's and others) it means they have tested the oil to the physical requirements of said specification and it exceeds that specification or they wouldn't put the spec on the bottle or website.
 
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