what spaz said. everything about mr12 is different from other fuels. date of manufacture on can must be within 6 mos, earlier if possible. once opened 2 mos max life to be effective. seen 3 hp loss in 4 weeks once opened dyno verified.must be tuned, tuned in low/mid range big plus. must be drained/flushed after use which has become simple to do for me. basically nasty stuff requiring some maintaince as stated. 10+hp in midrange, 8 up top, couple ft lbs torque, is gonna cost a little, require a little work. this is what we average on the dyno everytime. relatively fresh, very consistient fuel. zx10's love this fuel, they just rip thru the gears when well tuned on it. u4.4 requires almost same guidlines, little better shelflife all around. both good fuels, as ur friend u will run good on u4.4, u will haul ass on mr12. i go thru 3-4 cans a season. racing is expensive, the look on the face of those busa/14 riders after u walked away from them down the track on a ten is priceless.
Last edited by gazx10; 06-15-2016 at 06:49 AM.