38 mins ago
wrote...

Just be aware that Mercury was changing from carbon steel driveshafts to stainless steel in the 1978-79 timeframe. So, you may want to be in the 1980 ish models rather than late 1970’s.

otherwise they are all fantastic :)

what size motor are are you looking?

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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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