Yamaha SHO Oil

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9
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South Dakota
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I have a new fishing boat coming with a Yamaha VMAX SHO 200 and started doing some reading on oil for it. Sounds like Yamaha wants their Yamalube 4M or 1M, or an FCW oil in it, but I about spit my coffee when I seen what they get for the yamalube. I've read of guys running t6 5w-40 in smaller Yamahas with success, any experience with it in the 4.2 liter VMAX? I historically put ~20 hours per year on my big motor and plan on changing it every fall before storage. I'd like to find a full synthetic that will do the job and not cause any warranty issues (5 year factory extended w/ current promo) but won't cost an arm and a leg.
 
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4WD

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13,505
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Texas
This is a new motor … ? What does the owners manual say about NMMA approved oils … ?
 
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233
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NWA 60634
SHO in Yamaha speak used to translate into super high output. Big dollar, top performance. I'd pony up the money for Yamaha oil, maybe let the dealer get the first few changes in.
 
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11,362
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Illinois
Confusing since Yamaha was part of the Ford Taurus SHO project providing the hot engine in the 1980s.
Originally Posted by Fattylocks
SHO in Yamaha speak used to translate into super high output. Big dollar, top performance. I'd pony up the money for Yamaha oil, maybe let the dealer get the first few changes in.
 
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106
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South
The SHO series are high performance motors. They should use the preferred Yamalube that's a synthetic. Break it in as per Yamaha's procedure. If not they will "make oil" and near impossible to seat the rings. You won't regret using the recommended oil in a 20k motor.
 
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9
Location
South Dakota
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Originally Posted by Fattylocks
SHO in Yamaha speak used to translate into super high output. Big dollar, top performance. I'd pony up the money for Yamaha oil, maybe let the dealer get the first few changes in.
Thanks for the replies, I maybe should have worded my post differently. While I'm not out to pinch pennies on a 20k motor, I'm not looking to spend top dollar coin on middle of the road performance either. If I've learned one thing from this site it's that just because an oil is the most expensive, doesn't mean it's the best. I may also look at Amsoil as I had good results with their HP marine oil in my old Optimax. Has anyone had experience with their synthetic 4 stroke outboard oils?
 
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9
Location
South Dakota
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Originally Posted by PontiacHO
The SHO series are high performance motors. They should use the preferred Yamalube that's a synthetic. Break it in as per Yamaha's procedure. If not they will "make oil" and near impossible to seat the rings. You won't regret using the recommended oil in a 20k motor.
I've heard mixed reviews on the break in procedure and the "making oil" problem with the 4.2 liters. Some folks are saying to follow the Mercury break in procedure which essentially runs it a little harder earlier than the Yamaha one.
 
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167
Location
Tennessee
For the first time taking it out break it in with 1 trip if possible - full 8 hours. Fill the tank and go to a lake instead of a river system where the water is warmer. You need the heat and load to seat the rings. I have an outboard that makes oil and wish I could break it in that way.
 

4WD

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13,505
Location
Texas
They push the 4.2L to way more than 200 HP ... it's not that radical. Mystik has some excellent synthetic NMMA TC-W oils around $8/quart They publish all critical properties on website
 
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