I have been using Lucas fuel additive which works great but now that my tansmission started slipping 91 Mazda MPV this transmission shop told me add a bottle of Lucas Transmission additive so I did went to auto parts store and it wasn't untill 120 miles later that it started running much better now it's running trouble free thanks Lucas for saving me $ 1800.00 dollars and around Xmas this is a miracle you see they still happen. I hope that many others try this before spending there hard earned money. Thank God & Lucas Techs.