I'm taking the elements mentioned so far and going with them...
I'll design a video game where participants construct their likenesses like on a Wii.
Then, at beginning levels, people just throw bottles of oil at each other (for point totals, of course).
You're then assigned a vehicle. Yes, being dealt a Smart car will effect your competitiveness compared to, say, a Ford Explorer but that's how the play is spiced.
As play advances, cleanliness of coolant and transmission fluid condition is compared.
Spot inspections for battery terminal crud can advance you or set you back.
Boasting determined to be false results in severe docking.
Regional advantages like sales not seen in the Northeast will be eliminated-they're just not fair.
Rust, however, will be a factor since treatments AND multiple vehicles are allowed.
The terrain ranges from dead stopped traffic to wide open highways. Frequent cold starts and towing illegally heavy trailers uphill in Death Valley well outside your vehicle's power curve will pop up as periodic disadvantages.
Advantages are awarded to people have oil stashes-not too big!
Monopoly's jail will be reflected in the game's psychiatric hospital (for holders of immense stashes)
Cute dog/child photos work FOR the participant...great recipes more so!
Further advantages are given to members who have executed home projects mentioned here like tankless water heater installation or electric car chargers.
The game board will be abundantly adorned with colorful automotive fluid packaging like the Candyland board.
Play money will be used 1:1 relevant to real world costs. All savings calculations will be argumentative, of course.
BITOGers actually meeting each other will be awarded to participants attaining a certain level of success/points. After all, RA dented oil filter people don't mix well with the Fram Ultra crowd.
Losers wallow in a Hades of unfamiliar oil brands, stripped oil drain plug holes, NOS FLA batteries and checked tires.