Do I have to buy this echo oil to mix with gasoline? Hardware keeps saying if I buy any other brand I void my warranty. Its extremely pricey and there's my trimmer :
ECHO SHC-225S 20-Inch 21.2cc 2-Cycle Short Shaft Hedge Trimmer
ECHO SHC225S 102907368 | Outdoor Supply Hardware
New Power Equipment Models Dickens Turf & Landscape Supply
ECHO HC-152 Hedge Trimmer / Safford Equipment Company
ECHO 38 in. 21.2 cc Gas 2-Stroke Engine X Series Single-Sided Hedge Trimmer HCS-3810 - The Home Depot
ECHO 21 in. 21.2 cc Gas 2-Stroke Hedge Trimmer with 20 in. Shaft SHC-225S - The Home Depot