Pics of engine internals will please the arbitrators over all else.Yeah. It is still an assumption. My thought process was that an arbitrator wouldn't have any more reason to believe the dealership over me. If my receipts don't prove I changed my oil, not sure their's do either. Especially with the ubiquitous stories about botched oil changes at dealerships and quick-change places.
Hopefully I'll never find out if my receipts and photos and notes are good enough.
Only the scummiest of scumbag dealers would try to blame the oil with spotless internals. Arbitrators won’t fall for it.