Racing motorcycle oils

[jeff78]

Correct, it is fine to run M1 10w40 4T "Racing" on the street. I went into the weeds so to speak in the sense of saying M1 being on the lower end of the viscosity range has a decent claim to be a "racing" oil relative to others that state "racing" on the label, but live at the higher end of the spectrum for a given grade. Heck, I am probably on the spectrum.

FWIW, the Motul 7100 and 300V 10W-40 are also on the thin side for 40's. Actually thinner than the M1 4T.

But, last time I tried 7100 I wasn't impressed with it, not very good shifting feel and it was pricey.

 

[mrsilv04]

I've run Amsoil 10w-40 motorcycle oil in two different motorcycles, for a total of 125,251 miles. I doubt there's anyone here who can top that many miles of use in a motorcycle.
That said, I'm done with Amsoil and now only use Mobil1 4T 10w-40.

 

[The_Sheriff]

I've run Amsoil 10w-40 motorcycle oil in two different motorcycles, for a total of 125,251 miles. I doubt there's anyone here who can top that many miles of use in a motorcycle.
That said, I'm done with Amsoil and now only use Mobil1 4T 10w-40.

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Why the switch?
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