Looking to buy an Echo hand held blower pb-2520 and want to get input on using Red Armor oil for warranty and durability. I already have a Husqvarna/ Redmax 150BT that runs good on Poulan Pro/Husky semi-synth oil , which is ISO-L-EGD and JASO FD certified as Echo requires for warranty. Last I check is was made by Spectrum. I would like to keep one can of premix. Is the Red Armor worth the 50% price premium over the Poulan Pro or any other quality oil?