Engine tap at start up with oil light.

[john12312]

Originally Posted by blue62

Spoiler:
Spoils the air.
The air coming over the car creates a little lift at the rear..
Makes the back end light at speed.
So "Spoil the air" to eliminate the lift.
They do not create down force.
You need a wing for down force.

Thanks for explaining the difference. Good to know.