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Valvoline VR1 20w50. But to correctly answer your question oil viscosity will vary somewhat based on air and water temps you run the boat in.
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^^^^ will agree and will add oil viscosity - a big deciding factor is what your bearing clearances are set up at.
A good example of this is the Indmar and the PCM marine GM LSX (550 /556) requires 5 w 30. motor oil and some other of their GM based marine engines require 15w - 40 |
Originally Posted by ramos45
(Post 4321706)
mobil 1 15-50 synthetic
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Originally Posted by catsmeow
(Post 4321696)
I have used mobil 1 20w 50 for 10 years with good results on my 502 EFI 7lbs of boost some oil gurus have talked me into mobil 1 0w 40 I will post any pluses or minuses.
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Originally Posted by 1989mach1
(Post 4321744)
vr-1 20w50
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Amsoil Dominator Synthetic 15-50
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Originally Posted by Fordtrucks
(Post 4326467)
Amsoil Dominator Synthetic 15-50
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Gibbs Driven synthetic 15-50. Keeps great oil pressures even after hard runs.
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^^^^ yep I would stick with that to.
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Originally Posted by catsmeow
(Post 4321696)
I have used mobil 1 20w 50 for 10 years with good results on my 502 EFI 7lbs of boost some oil gurus have talked me into mobil 1 0w 40 I will post any pluses or minuses.
I'd have a hard time switching from what's known to work after 10 years. Some of these "oil experts" can't get an engine to live for 10 minutes. |
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