Thanks Matt and CTFSHWHISKER,

I'll keep buying the opti-oil. The reason is just as Matt explained, and the fact there used to be a Merc mechanic on the boat board, Tony I think, who said the Opit oil is made specially with smaller molecules to make them easier for injection.

I may have explained that incorrectly, it has been some time since I read that.

Thanks again guys..... I really can't afford a rebuild now on my retirement money... LMAO
Danny