The F-86 is a real smoker. It's a combination of factors. Joe, Matt, or any of your other guys that have more experience with these correct me if I am wrong on any of this. Jet engines smoke more when they are at higher power settings. One thing I can't be sure of is if they are using different fuels. JP-4 burned and smoked a lot, JP-8 will also smoke, but not as bad.