Thread: max oil temp and min oil pressure

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20lb at idle isn't bad as long as it stays up at revs. 245 degrees isn't terribly hot for oil, either. Keep in mind that oil must run hot enough to evaporate any water contamination from condensation. Still, I don't see any reason to use multi-vis oils in a boat engine. It ain't gonna get used in winter!

I concur with R Pope. I've got a 351 GT-40 in a ski boat and the owners manual says run straight 40W.

I'm surprised the oil cooler is not more effective than that. Where are measuring the oil temps?

Those temps are not too bad, particularly for synthetic oil. I would consider getting some hours on it (50-75?) and then switch over to a 20W-50 synthetic such as Redline or Royal Purple.

Nice engine and pics. That must be a scary blast on the water! I'll bet it will fly around most everything (except the gas station).

Kitz

Originally Posted by kitz

I concur with R Pope. I've got a 351 GT-40 in a ski boat and the owners manual says run straight 40W.

I'm surprised the oil cooler is not more effective than that. Where are measuring the oil temps?

Those temps are not too bad, particularly for synthetic oil. I would consider getting some hours on it (50-75?) and then switch over to a 20W-50 synthetic such as Redline or Royal Purple.

Nice engine and pics. That must be a scary blast on the water! I'll bet it will fly around most everything (except the gas station).

Kitz

i was surprised that the cooler didnt do better than that as well. the oil I am running now is not a syn. and I am not a fan of running syn in a new engine after a while it may get changed out. the oil temp is getting picked up in the pan about 1/2" from the bottom in the rear trap. so what I gather is I am fine to run the oil temp that high. so the next question is how hot is to hot?
thanks for the complaments Kitz it definatly shits and gets and gets great milage for a boat with that HP about a mile to the gallon

Originally Posted by R Pope

20lb at idle isn't bad as long as it stays up at revs. 245 degrees isn't terribly hot for oil, either. Keep in mind that oil must run hot enough to evaporate any water contamination from condensation. Still, I don't see any reason to use multi-vis oils in a boat engine. It ain't gonna get used in winter!

in my neck of the woods we use our boats all year long. winter here is not that cold