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 similar to an 6L internally. I've always struggled running 15w40 and 15w50 since I got this thing . It's certainly not a run of the mill 5.7L Chevy Gen 1. I plan to keep my boat another 20 years and 2000 more hours so engine wear is a bid deal to me.
I know old school is run thick oil to handle fuel dilution and stress but I wonder how much stress my boat really sees pulling skiers at 3000-3500 RPM - this thing has 375 HP and it doesn't seem like it's breaking a sweat.
I'm still running PB 15w40, but Is there something special about the Dexos that is driving this decision ?
PS - what do you think of Rotella Gas Truck 5w30 in a boat ? Seems thicker than most. https://shell-livedocs.com/data/published/en/86da4bf5-68c8-4676-bbe7-a2d42cc13ba7.pdf
I have a LS1 Engine and it's is similar to an 6L internally. I've always struggled running 15w40 and 15w50 since I got this thing . It's certainly not a run of the mill 5.7L Chevy Gen 1. I plan to keep my boat another 20 years and 2000 more hours so engine wear is a bid deal to me.
I know old school is run thick oil to handle fuel dilution and stress but I wonder how much stress my boat really sees pulling skiers at 3000-3500 RPM - this thing has 375 HP and it doesn't seem like it's breaking a sweat.
I'm still running PB 15w40, but Is there something special about the Dexos that is driving this decision ?
PS - what do you think of Rotella Gas Truck 5w30 in a boat ? Seems thicker than most. https://shell-livedocs.com/data/published/en/86da4bf5-68c8-4676-bbe7-a2d42cc13ba7.pdf
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