My Ranger has 93,000 miles on it.. Even tho I was having absolutely no issues with it other than my check engine light would come on periodically depending on which type of gas I used. I added your stabilizer and guess what ?? Check engine light went out and stayed out. The other positives were an increase in oil pressure, slightly lower engine temp. and a much quieter engine. I'm a believer and will also be adding it to my wife and daughter's vehicles at the next oil change.