Typical a 30w maxes at 35C from the various viscosity charts I've seen. The graph in the Ford manual is indicating a 5w40 oil.I found what I thought I had seen in the owners manual. It's for COLD climates and addresses cold starts.
I'll just have to pretend that it gets frigid cold down here early in the morning and then really hot in the afternoon. Lol. (0-40 weight)
I'm an lubrication outlaw
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