I have a Chevrolet Astro Van 2001 that just turned 502 283 miles on the original engine. I have been using your oil Stabilizer in the vehicle and had to replace a lifter at 352074, the man who owned the shop could not believe how CLEAN the Engine was on the inside and I do believe it's because I use Lucas Oil Stabilizer. Now that I have turned half a Million Milies using your product, I wanted to share this with you. I am the Owner/Editor of Thunder Roads Magazine Georgia and put as many as 6oo miles a day on the van running all over the State of Georgia. just FYI