I have been using Poulan bar oil, which goes for $10/gallon at my local discount store. After using 4 gallons of it I find it to be a great bar oil at a good price.Thanks for the great info...is the cheap bar oil really as good as Stihl's ?The Tractor Supply brand seems so thick compared to Stihl's. If TSC's is just as good, I could save a lot of $ this fall!