If you’re financing a new car and worried about the cost of ownership, you should probably think about the reducing the biggest cost with a new car on finance.
I.E don’t buy it using money borrowed from someone else.
That depends on the interest rate, I usually qualify for near zero rates, my last loan was something like 0.9%. When an index fund can return more than 5% in recent years it makes more sense to finance the car and leave the cash in the market. I can't think of a situation where the cost of ownership isn't considered, you should always consider what it costs to own any object. Even the ultra-rich will shy away from vehicles due to running costs, re: Bugatti tire change cost.
I.E don’t buy it using money borrowed from someone else.