To start with go buy a gallon of Simple Green at Home Depot. Use that to get all of the heavier oil out of the carpet and off the sheet metal. It's best to lay it all out on concrete so you can flip it back and forth. Use a spray nozzle on your hose for penetration.
Finish up with high quality dishwashing detergent to get the rest of the oil out of the carpet and to dilute the smell of the Simple Green. Rinse, rinse, rinse and it will be good again.....................
"Trust me........................
Spasso
530iT, 525 5-speed , 328is.