INTENTS
New Member
I was as the store the other day. I see that there is an oil for aging cars. Is this wise choice to put in aging marine engines?:huh:
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DO NOT use automotive oil in your boat!!!!!!
Automotive oil does not have corrosion prohibiters. (additives) Use your manual as a guide as to which oil is preferred. What ever you use, make sure it is rated with API service ratings of SH, CF or CF-2. Personally, I use Mercury's synthetic oil in my 8.1's, which would be an excellent choice for your 7.4L
Royal Purple also makes a good synthetic marine oil from what I understand, as does AMSoil.
I have heard this often, and I really don't understand this.
The inside environment of your engine on a boat should not be any different than the inside of your engine on a car (at least the parts that are lubricated with oil). Why are the corrosion inhibitors different in boat motor oil? I drive in Florida, and our outside environment (read intake air) is very moist year round. I cannot imagine that the motor oil I use in my car being exposed to a different environment?
So....(without flaming)...can someone explain to me where all this water (causing corrosion) is supposed to come into my boat motor, that would be any different from a car motor?:huh:
I understand that boat motors work much harder than car motors. I used synthetic 15W-50 in my last boat (which is what was recommended by V-P for their motors, if the SAE40W was not available). V-P was more concerned about using a synthetic motor oil.
Thanks!