- Dec 7, 2010
- Corona, CA
When I first purchased my new to me boat I had it serviced and the mechanic put Kendall 20/50 in it and it ran great in regards to the engine temp. Last season I had a different mechanic service the boat and he put a semi-synthetic blend 10/40 made by the manufacturer in the boat and it seemed like last year after a hard run the engine temp would go a little higher and take a little longer to come down. This year I had the mechanic who did the Kendall service the boat again but he used Liquid Molly 20/50 in the boat and so far this year it seems like it got to temp much faster than I'd like given the water temp and air temp. I'm not familiar with Liquid Molly; however, I'm kind of an Amsoil fan boy to be honest. What's the consensus with the liquid molly, should I pull it and put the Amsoil 20/50 in? Boat has a Merc 496HO and we normally boat in Havasu where the ambient temp is 120* and the water temperature is in the 90's so after running the boat at about 4,000 RPM for a while, I want to make sure I have something really good in there.