I think it is. I had a 500" low deck in my 9 second 69 Dart, after 15 minutes of street cruising my oil would get hot and would idle at 18-20 pounds at a stop light, always made me nervous. Now I have a 500" low deck in my Duster with no filler and it doesn't cook the oil.

I think a good oil cooler setup would help tremendously though.