Well I just purchased some Power Service Injector Cleaner (grey bottle) and waiting till the next fill up to pour it in the tank but I had a few questions first. On the back it states for better cetane boost and faster/better injection cleaning double the mix ratio on the bottle. Has anybody done this? Any ill side effects of doubling up the ratio? Also I heard white bottle for winter and grey bottle for summer, but here in Texas its gonna be in the 40s/50s the next week or so, so I figured the grey bottle would be best? Just trying to do a little tune up on the truck but dont want to risk messing anything up, especially some injectors. Thanks - Josh