Bought a Jonsereds chain saw 21 years ago and the logging dealer that sold it to me sold me a 2.5 gallon jug at that time. I faithfully used it and NEVER had a malfunction. That shop went out of business and so did my source for the oil. After 2 seasons of using other brands I had the tank strainer fail, the line collapsed, and the carb needed a kit. Been looking for this product since. So glad to have found the web site and will be purchasing a jug next time I’m out.