Lucas is a well known brand, and people has been using it for years. I honestly myself use dollar tree fuel additives, but whenever I change my oil I use Lucas heavy duty oil stabilizer. Of course I have a 92 Bonneville so my car can take the regular stuff. If you have a newer car that uses 0w20, 0w10, or 0w8 oil you will have to use the low viscosity oil treatment. My car has more acceleration, gets better gas mileage, runs better, starts easier, drives quieter, and the engine has less fits. The gas treatment should be good too. It is a very good brand, and overall more people should use it. So go ahead, most likely it is well more than worth the money.