Hopefully you switched to heavy duty 5W40 full-synthetic if you're towing. The factory Motorcraft 10W30 is a syn-blend and intended for "standard" duty. I've observed my engine oil temps extend into the 230F range when pulling big grades. The full-syn will help prevent oil breakdown at these high temps..
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2015 F350 LARIET CCSB SRW PSD
2017 KEYSTONE FUZION 325
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