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Synthetic oil may not swell seals like regular oil. That's OK if synthetic is used from dayone but on an older engine that had spent its life on regular oil it's almost like the seals drying out.
Switch back to regular oil and see if the problem goes away.
Synthetic oil may not swell seals like regular oil. That's OK if synthetic is used from dayone but on an older engine that had spent its life on regular oil it's almost like the seals drying out.
Switch back to regular oil and see if the problem goes away.
