having trouble finding Mobil 1 5/20 oil
#6
Just use 5W30 ... the only reason 5W20 is in there from the factory is for fuel economy standards, it saves 0.6% on fuel according to the old Ford bulletin. But you're better off with thicker oil for more protection. The GT-500 and Ford GT use 5W50.
cheers
Ed N.
cheers
Ed N.
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