i cant tell if it did anything to my old five stars five stars sea foam is good but as good as lucas seafoam is not snake oil i have used this stuff for years in gas and now in the break booster line man cant say enough about sea foam fixed my atv sea foam works great product have no idea if it actually works or not five stars sea foam is a fantastic multipurpose cleanertreatment check it out help turn the engine light off on my camry like i thought it would five stars sea foam one star