Well I was going to buy some new sealing washers, but decided to try this instead...
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I've heard good things so figured it's worth a shot. If it holds up good I'll put one on Tank too (was only $24).
Changed the oil then drained my catch can.
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Not a LOT of oil over the course of 5000 miles, but certainly enough to have made a mess of the filter if I hadn't had the catch can. Well worth the investment IMHO.