Thread: 5w40 mobil 1 esp formula m
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#8: 03-21-2013, 01:19 AM
 
 Tooslick
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Dennis,

I'd never run a 5w-30 in an STI. He'd do much better with the Amsoil 10w-40, or at least the DEO (their thickest 5w-40).

The low SAPS oils certainly don't last that long in turbocharged gas engines, using North American fuels....

Ted