Re: Can synthetic fluids be used in Packards?

Posted by Kip56 On 2021/5/5 15:32:55
I used synthetic (Mobil 1) once in my 56 Senior 374 V8 and upon start up it smoked badly as synthetic oil must have been getting past the rings.

Drained the oil and switched back to conventional (Castrol GTX) and cleared up almost immediately.

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