Standard JTS with about 117,000 miles. I've added a fuel vaporizer of my own design, which I sell through my own website. Been doing these in different types since the mid-1990's, and most vehicles get 30-50% improvement, with a 90% decrease in NOX and CO. The JTS was more difficult than most to set up - I think because it is a higher performance engine. It is getting between 30-40% better mileage, the higher improvement is in city driving.
Fuel vaporizer. Magnets on the fuel line, air intake and pcv valve (small but inexpensive improvement).