are you serious? how big of a fuel tank do you have?I put a bottle of grey Diesel Kleen in my tank every time I fill up. It seems to keep the truck a little more quiet and maybe gives a slight power boost. As for MPG increases, there were only a couple tanks where I didn't use the additive, but those tanks did get slightly less mileage. Might have just been coincidence, though.
Hi, im new at this but it sounds like we have the same type truck. So u dont put additives in your truck. I was looking at the BULLYDOG but not sure what it is all about. Could u ask u for some info on this truck. This is my first 2500HD DURAMAX. But i have been driving trucks for 30 plus years. Can u help me out please!According to the test opti lube is the best you can get but I wouldn't recommend running any additive in a truck that has a dpf. It can cause problems with your emissions sensors and also cause more frequent regens.