This is beginning to remind me of "Who's on first."

Original oil dumped at 4000 miles (no filter)
Second fill dumped at 7200 miles (new filter)
Mileage now 11540 miles
FSS says next double wrench B service with another change in 2400 miles.

Which means the present oil will be dumped at 9600 miles, less than the minimum 10000 that FSS would indicate anyway.

I think I'm fine.

ROGER E.

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Roger E.