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    Ford 351W / Valvoline VR1 Racing 20W50 / 48 hours - Tin/Cadmium?

    This is in a inboard ski boat. Engine is a Ford 351W with multiport fuel injection. (PCM GT40) has about 440 hours on it, oil was in for 48hrs this year. Ran from April to beginning of November. Manufacturers recommended oil change interval is 50 hours. Thoughts?
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    Aisin AW-1 vs Toyota WS

    Did a little searching and didn't come up with much. I'm assuming AW-1 and WS are different fluids, but Aisin has a fluid (ATF-0WS) that says it can replace the GM part number for AW-1. But, the front of the bottle says it's for applications that use WS. Thoughts? Their attempt at a multi...
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    2014 Silverado 5.3 / Rotella Gas Truck 5W-20 / 3522 miles

    Fair amount of towing on this one. Was surprised to see the fuel since it hasn't been too cold yet. Usually have that issue over winter with my short trips.
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    2014 Silverado, 5.3, 0W-20, PP, 5700 miles, 27%OLM

    2014 Silverado, 5.3. Pennzoil Platinum 0W-20, 5700 mile interval with WIX WL10255XP filter. Oil in service for 9 months. 27% OLM 26k miles on the truck now. Significant amount of towing over 5k lbs and daily trips are 12 miles each. Seems like the 12 mile trips on the previous changes do not...
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