I just bought a craftsman 42cc chainsaw that eventually will get converted over. I was reading the instructions and they want you to use synthetic oil for the break-in process. I thought you should always use standard oil for the break-in and then switch over to synthetic. I would use Lawn-boy ashless for break-in. Any thoughts if I should go by the directions or use standard oil

Terrell

I wouldnt use lawn boy ashless for any reason in any of my engines.If you want just use a good mineral based oil.The best thing to do would be to use pennzoil air cooled,echo premium,sthl,ect at 32-1 and just go for it.

Pennzoil aircooled is not synthetic.This is what the ultralite guys[some of them]use in theres.
I am probably going to start using this oil.[pennzoil]
I have been using Echo premium synthetic for years with no problems ever.
Just havent decided yet.

Pennzoil air cooled would be my choice for break.
I believe that synthetic oil is to slippery for a good break-in.

Remember that the heating and cooling of the engine is the major part of breaking an engine in.
Run it until it gets good and warm and then shut it off until it reached the outside temp. then run it again.

5 or 6 of these and your ready to start working the saw. 3 or 4 tanks of gas and it's broke in.

OH NO.... Another "oil" thread!

Pennzoil for Air Cooled Engines here....

AV8TOR

My experience with synthetic is that it is slippery and you will not get a good seal on the piston ring with using it for break-in. Craftsman has included a bottle of synthetic oil for the break-in. I am sure I could find a thread about Lawn Boy ashless oil, but what is wrong it.

Terrell

I use outboard oil (Citco, I buy it at Bas Pro when it's on sale) in everything 2 stroke. I planed to use it in my converted W.E. engines as well.

Am I bad?

U Bad.

I know the Pennzoil marine does not do well in air cooled engines.

Water cooled engines run a more uniform temp, while air cooled engines have hotter spots.

Hot spots will actually repel oil. There are a few exceptions to this, but not many.

Ralphbf
I just noticed you live in Woodland. I used to live in Woodland about 10 years ago and I flew with the Woodland Aeromodlers. I sure miss that field.