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Engine oil choice

GAS engine, transmission and generator repair and maintenance discussion forum.
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Journey!
Scurvy Dog
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Vessel Info: 1993 Carver 370 Aft. Crusader 454’s. Lake Superior vessel.
Location: Superior, WI

Re: Engine oil choice

Postby Journey! » January 26th, 2025, 1:56 pm

My 1993 Crusader 454’s owner’s engine manual recommends a straight weight 40W oil. I use Rotella. Anyone else?
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bud37
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Re: Engine oil choice

Postby bud37 » January 26th, 2025, 4:19 pm

Welcome to the forum.....how many hours on your engines ?
The above is strictly my opinion.
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km1125
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Re: Engine oil choice

Postby km1125 » January 27th, 2025, 1:08 pm

Using a multi-viscosity isn't going to matter. It won't get cold enough while you're using the boat for the "W" rating to be effective, nor necessary.
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mjk1040
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Re: Engine oil choice

Postby mjk1040 » January 29th, 2025, 5:23 pm

Rotella 40W is all I ever used in our Crusaders! :beergood:
Mike :down:
I'd Rather Be Boating!
1989 Sea Ray Seville
1986 Carver Mariner 32'
1990's Thompson 22' Cuddy Cabin
1990's 4Winns 245 Vista Cruiser
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waybomb
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Re: Engine oil choice

Postby waybomb » January 30th, 2025, 12:37 pm

I run Rotella but also add a can of the old GM EOC. It's very high in zddp.
I wiped the cams in the Cougar years ago when they started changing oil so it would not clog catalytic converters. They removed the zinc. I was running flat solid lifters. Wiped all the engines' cams. I bought a bunch of the original EOS and have a lot left over, so I use it in these old Crusaders.
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Fred
1969 Glaspar Avalon /1967 Johnson Electromatic 85
1987 Carver Mariner
1988 Cougar Kevlar 46' with triple blown 572 ci
1995 Boston Whaler Rage
Past - 1988 2807, 1989 4207 Aft
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