I have, I installed a 95 VW 1.9 Turbo Diesel in my Sammy. It has way more power than the stock 1.3 and a little bit more than a 16V. The install is actually very easy using the ACME adapters. I am no auto mechanic but I did it in 1 full weekend. My motor is new with only 2500 miles on it now and I'm getting an average of 27mpg. I've heard that if you use the non turbo 1.6 you can get 40mpg but not nearly as much power as a turbo. I had to run 33" tires to get it in the correct RPM range. My tranny, R&Ps and t-case are stock. I cruise the interstate at 70mph at 2700 RPM. I can accelerate on any hill with no problem at all. It will easily do 80 but Sammys start getting a little scary at that speed.