1. I always drive my 2.5L with a quarter of a tank of gas

I just never top off the gas tank on this car anyway (mind you, its a city car)
2. I also arrange for my rides to be for me-myself-alone (rarely need a passenger in the porsche car... mean style lol).
3. Spare tire delete? (I got stranded in a weird way so I can't really recommend this).
4. Clean and empty frunk & trunk works for me
5. Of course, performance wheels helps "a lot" but then... at a price