HAS M-1 15/50 auto oil been reformulated over the last few years??

[Steve F]

Greetings from a newbie

Great site

I found this site posted on my motorcycle forum.
I have experience with Amsoil, Mobil & Spectro
in use with autos & motorcycles.
I am not an authority, just a consumer, so please
don't beat up on me here.

Myself as well as countless others have had excellent results with M-1 15/50 over the years.
My concern is this....I have been believing the M-1 15/50 can't exsist as energy conserving oil
because of it's viscosity therefore doesn't have friction modifiers(my bikes wet clutch is happy)
& has not had it's antiwear additives changed or diluted possibly making it into a less as effective product as it once was...as far as a wet clutch motorcycle is concerned.
Is it what it was all along or has it now been reformulated??

Thanks,

Steve F

 

[TR3-2001SE]

I am no expert but I believe is was reformulated from the TRI-synthetic version to the to Super synthetic. Do a search in the VOA virgin oil analysis section. I don't believe it had moly before and does now. Also there are several analysis on tri-synthetic and Super synthetic in the UOA section that will help you with this.

 

[JHZR2]

The tri-syn met MB oil specs (229.1 or 229.3, I dont recall). Newer supersyn doesnt meet any MB 229.x specs, so I assume there was some major changes or else they didnt bother to pay for re-certification.

JMH