I only do it when it's cool enough to actually get some results. It's been 116/110 degrees here and we have my car and my moms in the garage, when the garage closes and the engine heat from both of those cars heats up the garage... ah man that's what I would imagine hell to be like lol It gets so hot in there you can't breathe.

I want to leave my car out in winter though, so it cools quicker.

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2007 BMW 328XI