Quote:
wileyE,
Amsoil first came out with their 100:1 oil in 1973, and then came out with their first gen. injector oil (TC-W3) some years after that.
The 100:1 stuff, ie an ISO-L-EGD product, has always been their preferred offering for high rpm, air cooled engines uses in OPE applications. The injector oil does meet the API-TC spec for air cooled engines,but I consider this to be a bare minimum spec for something like a chainsaw and ISO-L-EGD and/or JASO-FD is clearly preferrable, due to the additive chemistry.
TD