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Reply to "Mobil 1 Ext. Performance - SM?"

ISLAC GF-4 oils do not have the phos capped per se ...... It's the API SM designation that denotes a cap on phos .

Was that what you mean't to say ?

I can see that happening but one will take it's place most likely . Maybe like the A3 Euro version in the other thread or 5w-30 Truck and SUV
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