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Gear Lube Question

adam_g

adam_g

Contributing Member
"Does anyone know the differen

"Does anyone know the difference between marine 85w90 gear lube and automotive 85w90 gear lube? I was thinking of switching to Valvoline's semi-synthetic (API GL-4). I change it twice a season, fresh water, Bravo 1."
 
"Go with the Full Syn. in 75W-

"Go with the Full Syn. in 75W-90.......

Much Better Oil,+ just a few Extra Pennies....."
 
"Nothing,......

Merc sells

"Nothing,......

Merc sells their Regular gear lube,.... Dino Oil.....
And the Merc. Hi-Performance,.... Which is a Full-Syn oil.......

For Me,.... The Valveoline is an Off the Shelf item,....
Merc. lube is a Run,+ Go Find It item......

The ONLY Difference is the Color..........."
 
"There is no problem with Merc

"There is no problem with Mercruiser's product other than my local West Marine shut down and it is a seasonal item in Michigan in other stores. I was just curious if anyone knew what the the difference was. If it is water resistance, I thought water had no business in there anyway"
 
Mercruiser lube is 11 bucks a

Mercruiser lube is 11 bucks a quart here. I'd rather pay a lot less. How much is valvoline synthetic? The merc oil seems a lot thinner than 85W-90 or whatever. It seems like 10W30 to me.
 
I've always used the synth

I've always used the synthetic. Checked the temps on the top head plate of the drive on a Bravo 1 and it lowered the temps by 10% !!!
 
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