I have 4 stroke and 2 stroke engines. I have always used Stabil in my gas for the lawn equipment, 3 of them are 2 stroke and 1 is a 4 stroke. However, I have noticed that my Echo blower has been getting harder and harder to start until it finally wouldn't start. Took it to repair shop and he said my "converter and muffler" were stopped up. He said to always use Seafoam and High Test Gas in my 2 Stroke engines. I want to know if both these products will work in my gas on 4 and 2 stroke engines and if they work the same?