Low tension are generally for racing only, I ran them on the street and with an electric vacuum pump, and burned about a quart or more every thousand miles. I did get good plug readings though. I also used the medium tension, trying to get away from the
oil consumption, and pulling 7 inches vacuum in the pan, and still burned
oil, and never got a clean reading read on the plugs...I just picked up that engine last friday after having it rebuilt, with regular tension total seal...now time will tell.