Slightly off-topic, but Is there a certain amount of times that a product can be shown in one episode?
I've noticed that the last couple of episodes of NCIS:LA, on straight after Hawaii Five 0 (slightly back on topic then), they've been driving what are obviously Audi vehicles, but in the majority of shots the 4-ring logo on the front grill is missing completely. Then for the climatic gun-fight/showdown they draw up in what is supposedly the same car, only this time it has the Audi badge clearly visible.
I don't think it's a continuity issue, especially as I've noticed it happen in a couple of recent episodes, and it happened once or twice in The Mentalist when they were driving what were obviously Chevy cars, but the front badge was blacked-out or obscured apart from certain shots.