How important is it that the car be horizontal while draining the oil? I just got a set of the Rhino ramps (17 degrees) and was reading that the car really should be horizontal while draining. Alternatively, would it be possible to use a vacuum pump to get the remainder of the oil out while on ramps, or is that just silly?
Also, given the height of the car, I'm assuming I'll have to backup onto the ramps and have the rear elevated. Is that how most people do it (with Rhino ramps)?