I originally used the oil stabilizer and wow what a difference that was! in my Delta 88 my tranny was kinda rough hard shifts, and all that bad stuff. I put in the transmission fix, and it was a completely different car! ran hard and strong. I have been using lucas oil products in my vehicles for about three years now and they WORK. im about to drain the front and rear differential and transfer case on my 98 tracker and use half and half mix. this stuff is amazing! i think you should send me a huge decal so i can throw it on my truck! ive already got one of my friends using these products too, and he loves the stuff!