I have what I feel is an amazing testimonial. I have been using your Heavy Duty Oil Stabilizer after seeing your gear cluster demo showing how your lube clinging to the moving parts while rotating the hand crank. I have since been adding Lucas Oil to my lawn tractor engine and all my vehicles with every oil change. One day when I drained the oil from my tractor, I installed about 8oz's of your product and did not add the rest of the regular oil . Since Lucas Oil was so thick and needed time to settle, I decided to finish refilling it the next day after work. The next day my stepson returned home before me and decided to cut the grass. Ocassionally he would do that for me without telling me if he had time. Of course, how many teenagers check the oil level on our mowers before cutting the grass. Well, he cut 2 acres and miraculously the engine did not freeze up. When I returned home from work and saw the grass was cut, I only hoped he had checked the oil level. Nope!! Well that was over 4 years ago and I have been meaning to send you this testimonial for some time. I'm not sure if the engine experienced any substantial wear but, I have been cutting grass since then without failure. I just wanted to let you know how happy I am with your products.