Volvo has been specing Full Synthetic SAE 30 or more recently Full Synthetic 10W - 40 for the past two decades. Most Auto-Truck oils, including Diesel oils do not meet the Marine FC-W cert, however it is your engine, so you can use whatever you want. I know several mouth pieces will be jumping in to say, they have been using brand A, brand X, brand BS, with bacon drippings added and have never had trouble. Whatever, their minds are made up, facts will only confuse them

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Thanks Zool. I should have mentioned that I was aware of the aluminum prep. I plan on doing the vinegar and Diet Coke wipe, and either etching primer or an epoxy if I get some money soon enough.

Thanks again, much appreciated.

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