1990 Force 150HP and synthetic oil

[Macattack]

I've read past posts about synthetic oil and I'm left confused. Will a blend or 100% synthetic oil do harm to my Force 150?

 

[roscoe]

Re: 1990 Force 150HP and synthetic oil

No.<br /><br />All the rantings on the petroleum/synthetic debate are over which is best, which seems to be a matter of opinion and contradicting "facts" by the two sides.<br /><br />

Use a NMMA rated TC-W3 oil, either petrol based or synthetic. That is all that is needed for your Force.

Whatever oil you use, you should decarb annually according to your owners manual.<br /><br /> Decarb Process

 

[JB]

Re: 1990 Force 150HP and synthetic oil

Probably not, Mac.<br /><br />See the article on oil type in the FAQ section.<br /><br />Moving to General Outboard.