Hey guys got a quick question that some of you may have the answer to. I have a 2005 mustang GT with the 5 spd manual. My only mod so far is the diablo tuner and a k and N drop in. I have been running the 93 tune for the past 6k miles and that may be my problem. I have put 93 gas in it from BP every time but that may have not been good enough. On long trips sometimes I will go from 5 to 3rd gear on the highway and it seems to miss bad. It seems to buck untill I lift and get below 65 mph. At that point i can go WOT again to red line in 3rd with no issues. This is NEVER an issue when just doing short ( less than 50 miles at a time) drives. I have only noticed this when traveling from WV to Bristol TN and from WV to Daytona ( where I am at now). I never get the trac light when this happens nor do I get an SES light. It has happened once when I had the trac control off. This issue does not happen every time even on long trips, just when I really need 3rd gear not when I just want it for fun. I brought my tuner down with me and I have flashed it back to stock to see if this resolves the issue. Has anyone else had this issue? Is it safe to drive around all the time on the 93 tune? There is no place in WV that I know of that I can take it to for a custom tune so the best I have for now is the 93 tune. On a side note whats the performance difference between the 91 and 93 tune? Would driving around on the 91 tune be safer. I was just wondering if anyone else has this issue and if they figured out a solution. Thanks in advance for any help.