What oil should be in my 454?

[07DominatorSS]

Originally Posted by generalee31184

I was reading a mercruiser repair manual I have and it says sae40. My problem is i dont think I have ever seen straight 40 in any stores around here. One of the local boat shops told me they just put that 20-50 in every one they service, but I think they are servicing mostly newer mercruiser stuff.

Straight weight oils are a thing of the past. Either use a 15w/20w-50 or a 10w/15w-40. I use AMSOIL 15w-50 Racing Oil.

[minxguy]

Originally Posted by scottw

I have a 1990 454 Magnum with a 10qt. Canton Pan and I run 8qts. of Kendall GT-1 40w with 2 qaurts of Lucas.

Why?


Ken

[scottw]

Originally Posted by minxguy

Why?


Ken

Why not? Heard some good things about Lucas. It's said to eliminate dry starts due to it clinging to the metal. I've also noticed it helped to increase my oil pressure a little when hot. Motor also runs cooler. Plus they sponser a race boat. Support racing.

[mhydro4u@aol.com]

Originally Posted by bigboat28

mhydro4 how many hp are your motors and are they 2 bolt or 4 bolt mains

when i bought the boat, ive got a sheet on just what the motors were dynod at and i wanna say it was 466, not to sure i say that because i could either by the boat with prochargers or without and i no with the pg it dynoed at 647hp and i chose not to put them on the boat because of longer life.

[mhydro4u@aol.com]

sorry they are 4bolt

[CB-BLR]

There have been huge discussions on this topic.
Search "best oil"

After thousands of hours of lab and real world testing...

The general consensus is that Mobil 1, V-twin, in 20-50 or Amsoil are the best two oils to use.

Chris

[mhydro4u@aol.com]

i agree mobile1 & amsoil, but ive been real happy with valvoline vr1 racing 20w50 with high zinc content!