Gregg...... The oil was from the engine and car wheels and the carpet was white. Not much oil and I had too clean and clean to get the carpet so that she did not notice any more oily carpet. But 3 years and one move later I got a train building.
With the new transformers the problem of hot wires is most likely very small. Gunrunnerjohn's ideal of using a insulating sheet of fireproof material would stop the wires from burning the carpet and also help keep oil and dirt off of the carpet.
