Best conventional straight weight for a 700 Hp engine
#1
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Best conventional straight weight for a 700 Hp engine
I received a PM...guy wants to go with a straight weight oil in a tricked out 700 HP engine...ambient temps are 85-90* F.
I have no suggestions for a straight weight...because I would not go that route personally.
My choice would be Valvoline 20W50 VR-1 Racing Oil...you have high pressure springs on those flat tappets and this oil has a ton of ZDDP. Faster start-ups are good over a straight weight. Excellent friction modifiers as well. It's a "balanced oil". ONe of the best of it's kind. My choice for offshore engines if you want a conventional. Synthetic? M-1 V-Twin.
Get a Wix/Baldwin/K&N or NAPA Gold oil filter and you wil be all set.
http://www.valvoline.com/products/co...ng-motor-oil/6
I have no suggestions for a straight weight...because I would not go that route personally.
My choice would be Valvoline 20W50 VR-1 Racing Oil...you have high pressure springs on those flat tappets and this oil has a ton of ZDDP. Faster start-ups are good over a straight weight. Excellent friction modifiers as well. It's a "balanced oil". ONe of the best of it's kind. My choice for offshore engines if you want a conventional. Synthetic? M-1 V-Twin.
Get a Wix/Baldwin/K&N or NAPA Gold oil filter and you wil be all set.
http://www.valvoline.com/products/co...ng-motor-oil/6
Last edited by Hydrocruiser; 05-27-2010 at 06:14 PM.
#2
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I don't know the temperatures that the low viscosity of the oil kicks in at, but I was under the impression that they're below the ambient temps that you're suggesting.
I would run a synthetic straight 50 weight after break in.
I would run a synthetic straight 50 weight after break in.
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merc uses a 20/40 but for yrs I thought it was a 40, I have used a 40 and a 50 with no troubles after doing mods to motors. I heard of guys using m 1 syn 15/50 which I USED on my 650hp motor.