I've been using the V6 tune and software for a while now. I tried to use the oil service reset and nothing happened, Tried several times. I know it worked since I used it for my initial break in reset, but I remembered that was back with the older V4 software, so I flashed the V4 tune with the v4 software and used the v4 tuneboy trim and the oil service reset worked like it should. After the reset I flashed back to the V6 tune. You can have multiple versions of the Mitsubishi flash and Tuneboy trim programs on your computer just put the other versions in separate folders after the initial install. From use I've notice you have to use the corresponding flash, trim, and tune versions. Just an FYI if you have an 1199