Just out of curiousity and for future reference, a list of cars and engines people have used GC in and their experience/opinion. I have used it in My Audi V6 30v, a 12v and in an I-5 Audi that is 20 years old and has almost 200k. After long runs of 11k / 6months in the 30v, an ARX treatment removed no sludge. In the I-5, there were no leaks and it ran great. Consumption was silly low and starts down to -10f were a breeze.