Fair question. In short: Unless you're buying Tesla your car expenditures won't fund any significant research into improving cars in a way that benefits humankind.
(As for the other expenditures proposed above: real AOC Champagne supports the vineyards and traditional practices of the Champagne province of France; caviar... supports sturgeon fishermen? But consuming both together is just conspicuous consumption -- Champagne is a dessert wine. :) )
clock_tower did so here, very excellently: https://news.ycombinator.com/item?id=13749603