We have been selling VP and Echo canned fuel for 10+ years without a hitch. I did once have an Echo CS-590 come in badly scored while running Trufuel. However, we had not sold the saw so it's possible it was running too lean for the ham-fisted operators. If everyone ran canned fuel, I would nearly be out of a job. Even if every consumer was guaranteed to buy an improperly mixed can of premix in their lifetime, it would probably still be worth it because of the decrease in fuel system repair bills. And I have more confidence that a good brand of premix can mix oil right than some random homeowner.