I have changed oil on at least two cars with aluminum oil pans and have never had a problem. The drain plug does not need to be that tight, it doesn't hold the car together it just holds the oil the pan, and there is no pressure on it. You may not need to get a new oil pan though. They make a larger plug. You just thread it into the existing hole and it taps new treads as it goes. I think the car I used that on had a steel oil pan, but should also work on the aluminum one.