I just recently got a new set of 8 injectors (under warranty) at 136,000 miles. I have owned the truck since 68,000. I have used the Power Service additive since I've had it, and had no issues. The white bottle for under 50 degrees (anti-gel) and silver bottle over 50 degrees (+6 cetane boost). Any recommendations one way or the other on which additive is best?? Being in northeast Indiana, we see all types of weather - not really tundra-style cold (but we can see -10 or -20), and not blistering hot either (usually tops out around 90 with some 100 degree days in the summer). I've always stuck with Power Service, and I'm just soliciting opinions. I've read a lot about FPPF's Total Power, and it seems to be just as good. Any thoughts???