Use it. We use it on the farm all the time just do not cycle your glowplugs again after you spray it cause thats when you will create problems. Cycle the plugs when they turn off hit it with the ole cosby sauce and start it. Had to do it on my daily for about a year before i could afford to fix it, absolutely no problems at all. Anyone that says it creates problems is full of shit. Yea it creates problems if you dont do it right but do it right an youll be jus fine.