"The lid was still on the oil tank. The tank sits in an enclosure that has a bolt on lid on it. The "box" is open at the bottom and if the lid is off, air from beneath the car evacuates out the top of the box and creates lower pressure under the car ... more downforce."
OOOooooo... a suction effect
clever.. how come nascar doesn’t want cars to stick as well as they could is what I might ask,, hmmmm..
Thanks for posting that.