Originally Posted by houston

rbmods oil is thick, it is the best stuff as far as ARO , its semi sunthetic , safe for silicone cranks and is not that hard to start up . tip: prime your engine before starting up by blowing on the pressure line and holding the carb open


the reason why it is suggested to run all the fuel out is bescause there are corrosive properties in the nitro methane and methanol that is in the fuel . this will in the long run shorten your bearing life drastically


RB mods ARO if you are gonna run the engine within a few days its ok to not insert ARO in the engine , if it is gonna sit for more than a few days use ARO tip : leave your engine sitting with the front of engine pointing down ( trust me )