I had purchased a 1959 Edsel Ranger. {A once upon a time Ford brand of car. They only made the Edsels for 3 years} and the motor smoked like it was ready to blow. I added 1 quart and within a matter of I'd say 4 days tops it just stopped smoking. I have recently changed oil since and continued to add 1 quart of Lucas oil and still the motor runs strong and smoke free. The motor is a 223 inline 6. Thanks alot Lucas!!!

Danny Petersen Sr

Nebraska