Mine receive a mix of Sea-Foam, Marvel Mystery and BerryMan's. I got called Stupid for it (That won't happen again) but it works. Open them up they look like new. I buy the Sea-Foam by the gallon when Tractor Supply puts it on sale every spring. Have found Rural King has good price all the time for gallon of it. Mix with the Marvel & BerryMan's and I have cleaner for the year that WORKS!! For everything in the garage!!