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Opti-2 and 4 mix engines

Richard Martin

LawnSite Fanatic
Greenville, NC
I can't say for sure but you should be able to. I usually use Amsoil synthetic so I emailed Amsoil and asked them about using their oil in the Stihl 4 Mix. They said it will be fine and added that if there was a lubrication problem Amsoil would cover it.

lazer 46

LawnSite Senior Member
upstate New York
I e-mailed Opti-2 but haven't gotten a reply yet. I am getting to old and senile to be using different mixes for different machines.