I fully agree. I can see where my diaper made an attempt at containing oil, but it has its faults as well.

Understand guys, I simply put one on to conform, although it is a good idea in theory, it has to be functional.

Take a look at the unleashed rule, it said all boosted applications had to run a diaper to participate. So I bought one.
NHRA rule book does make an exception for cars with steering links passing through the oil pan