i do all of my own oil changes on my rides, always have. ever have someone cross-thread a filter housing for you, or strip an oil pan drain? or put a filter in, but no oil, or too much or too little. on no gasket on the filter? etc. etc.
i do it myself, especially on a car like this with a different, easily screwed up filter setup. there is no room for error in these cars. wrong oil, wrong amount, can be a bad thing.
the tundra, in a pinch, can go get a service change sometimes, if i'm out of town or something.
i keep the receipts, and the box top of each filter i've bought in the glove box... if that's not good enough for them, on a totally stock car, then enjoy the lawsuit.