I have a wierd problem and I cant seem to find out what it is. My car's interior smells like natural gas or propane. The smell has been there for over a week and it becomes stronger as I drive the car with my windows down. It started smelling right after I got my 30K done. I went back to Luxury Motorworks to see if they can figure out the problem, but they have no clue. It may be the new transmission fluid (Redline) but im not sure. Im pretty sure it has something to do with the 30k service, engine oil, diff oil, tranny fluid, radiator coolant. Any ideas why my car smells? BTW, we sniffed the entire car but the smell only comes from the inside. :-?