1 thing you have to think about with full underbody pans that cover the engine bay. This can be a fire hazard in case your engine, tranny or power steering leaks oil. The fluid could build up instead of going on the pavement. There was some recall, maybe Ford Escapes where there wasn't enough (or any) holes for fluid to escape.
I may not be following this logic.
Ford recalled Escapes not because they leaked too much.......BUT because the oil couldnt reach the ground!!!??????????
I have had several cars that leaked. I would spend the $1.50 a month to clean the engine compartment at the car wash.
And it is very easy to design a pan the would allow the fluid to drain.
