-According to label they have different additives, seal conditionersm etc.
-Changed fluid every 30,000 miles. Camry transmission in good condition 155,000 miles. My transmission is not leaking.
-High mileage engine oil sounds like it might swell seals in (damage?) good condition. What about...
You said "Note that I'm selling the Hybrid in this scenario before the battery warranty is up. All other maintenance is comparable and thus left out for simplicity."
You have to include cost of buying a NEW CAR if you sell befor the battery warranty is up so YOU'RE NOT SAVING ANY MONEY (I believe)
think the problems is not the $65 but "each year the Vet(s) want complete evaluations just to tell me whats wrong. $250. "
You need to evaluate where Your money goes.
Maybe you can find a cheaper vet or younger technician who knows how to work on them.
I have distilled water (for drinking) and I want to use it for a car wash. Is there some sprayer I can buy? The weed pesticide sprayers don't work I think.
i think its a combination of car model, suspenpension design, road surface. i had a bmw like this. german cars are more performance oriented-- tradeoffs.
you could change car for better life or deal with it.