2011 SMS 630. I have JD Jetting module installed. Factory calls for 98 octane fuel but the best i have local is 91. I live in New Mexico with elevation around 5k/ft above sea level. Without trying to dig up a necrothread dated 2009, can anyone tell me should I use octane boost, some ratio of racing fuel, or just use my jetter to get the best fuel/octane performance
