i had used tsc for years then they changed the oil blend (thicker) i could not get it to pump through any of my saws, all five pro poulans and two small echo's... none would oil enough.i even tried stihl with same result.i have run shindaiwa red armor oil ever since...its the first oil i have had to reduce the rate on.
I bought one Gallon of TSC oil a couple of years ago. I didn't use because it was much thinner than most of the bar oils. To me bar oil is a lot cheaper than Chainsaws. Stihl and Husqvarna have a honeylike consistancy.