Hoping that this is not a problem. Winterizing the boat last week, and thought I had enough quicksilver premium lower unit oil(synthetic), and about 3/4 of the way through I ran out(1990 120 hp Force). Filled the rest with OMC lower unit oil....will this be fine, or should I change the oil again in the spring? Its about 3/4 Quicksilver Synthetic, 1/4 OMC non-synthetic.
