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I've been running Delvac 1300 15w40 for the last 3 years. Do you think the M1 10w40 HM would be better for my inboard ski boat. It's a 5.7L MPFI engine - Typically 50F-95F outside temp during our ski season. Not unhappy with my oil choice but always wondered if that stuff is too thick at...

I've been doing a 6K OCI on my 2013 Pilot when the 20% light comes on - We have owned the Pilot for a year and are putting about 16k a year on it. Engine has 100k and is not burning any oil between changes. Been thinking of doing a 8k OCI and just doing it April and October to make it simple...

Attached is a screenshot of an advisory from PCM (the engines in Nautique boats). They are suggesting the 6.0L and some other engines switch to 5w30 Dexos 2 instead of 15w40. I know that Ilmor and Indmar are also saying run 5w30 in some of their newer engines. I have a LS1 Engine and it's is...

just wondered are these 2 oils pretty comparable ? I know one is a dino oil. Will be using in high load situations.

Hi Guys, i have a stock 2002 Corvette LS1 in my ski boat with 460 hours - It's a beast. Since break in it's been ran with M1 15w50. I purchased the boat this spring and left the 15w50 in it since it was fresh, but felt it might be a little too thick of oil to run. When i changed it this fall...