5w 40 synthetic, ok to run all year?

dmc919 · #1 (**permalink**) 03-28-2010, 06:22 AM

i live in florida and tow 18k about once every 3 months, i'm thinking about running a thinner oil to help with starting with these tired injectors.

BLACK_PSTROKE · #2 (**permalink**) 03-28-2010, 06:43 AM

as long as you dont have any oil leaks switching to the 5w40 syn. will help out. but if you have any minor leaks the synthetic oil will really leak.

E'sStrokr01 · #3 (**permalink**) 03-28-2010, 06:53 AM

Waste of money and no added benefit. Plus our trucks call for a 15W precursor - not a 5w. It's awfully thin for an industrial engine and as stated WILL leak more if you already have any leaks.

BLACK_PSTROKE · #4 (**permalink**) 03-28-2010, 09:06 AM

its not really a waste of money. especially not in cold weather i switched this winter to the 5w40 syn. and it made my cold starts 10x's smoother than with the 15w40

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