To to update further on my 2004 2.7l sebring, that I have been using pure synthetic oil changes every 5000km since I got the car at 22000km. I am now getting over 100km per tank more in mileage. Far more power than it ever had in the past 5 years since I bought it.I originally bought 3 bottles and have since bought 6 more. I am also running it in a 2009 pt cruiser that my mother has but it will take some time before there is 5000km put on it ...so I will keep you updated at that point. I really think it saved or at least added many years to my car. I read about this stuff for months and it works...from now on any car I own will have this as basic maintenance....I am glad I tried it and I am in my mid 50s ...so I have tried stuff before...but not like this!