Saito FG-21 (1.26) 4-Stroke Gas Engine - BNKey Features Gasoline engine lowers operating costs as much as 90% Latest carb technology makes for easier tuning and operating 21cc displacement in a 17cc case New valve seat design New, smaller magnetic ignition system fits into tighter cowl installations Horizon Hobby recommends the use of Red Line or Power Model synthetic oil only, at a mix ratio of 16: 1 20: 1 Overview There are a lot of advantages to going with gas, like cleaner operation and