Originally Posted by SeaJay
You do not have to prove you did the maintenance, the manufacturer needs to at a minimum to deny the warranty claim assert that you (a) did not do the maintenance, and (b) the lack of maintenance was the cause of the failure.
Thank you and that's my thoughts on this as well. IMO, all our DIY records are is data to help support that maintenance was done. Even a dealer receipt for an oil/filter change doesn't necessarily mean they changed the oil and filter on your car.
What scares me is a situation like this pathfinder guy is in. If the dealer/manufacturer denies warranty coverage solely because of visible sludge, but yet the guy has done oil changes and has receipts, what good is any of it?