Petrol :Oil what mixture?

i have my bike with petrol and oil in 3:1 ratio

sree
June 2010

have a mcculloch 338 chainsaw how much oil to mix with petrol

andrinamcaulay@btinternet.com
June 2007

I have always run my McCullochs on 30:1 Synthetic and never worn one out yet.

Peter.
May 2007

40:1 is the best mix for most string trimmers.
That's 3.2 ounces to 1 gallon of unleaded gas.

Good luck mate!

Byron
May 2007

Most basic 2-stroke engines will run okay on a ratio of about 30:1 two-stroke oil to petrol. If no better answers come along, try that. If you err on the side of caution you won't go far wrong. Too much oil, and it'll just smoke a bit. Too little oil and it'll seize.

My boat engine runs on about 40:1, but that's expensive synthetic oil on a Mercury 200 V6. Doesn't really matter what type of 2 stroke oil you use on your engine as it's pretty lightly stressed and low tuned. Just 2-stroke that you buy in Halfords will be fine. 30:1 would be a good guess I'd say.

Hope this helps.

Graham.
May 2007