I got my truck in dec. of 05 (2006 lbz truck) truck now has 36000 miles on the odo. I have been running power service fuel additives the whole time. is this a good practice? what are you guys using?
thanks for any and all info!!!

Power Service silver bottle most of the year, Power Service white bottle when it stays below freezing. I also add an ounce of 2 stroke oil per gallon of fuel.

There are lots of opinions about additives on this site. Check out the sticky for Spicer's Lubricity Study and enjoy the read.

Stanadyne PF.

I run our diesel concentrate, but running something is good insurance with today's fuels.

Running a good fuel additive that does not contain alcohol is a good practice. If you have had good luck with power service, then stay with it. The fuel additive makes the fuel burn more efficiently and stabilizes the fuel and keeps the injectors clean. I personally run Stanadyne PF (8oz)along with Stanadyne lubricity formula (4oz), and have had good luck. I have also experimented with 2 stroke as well and had good results. I have in the past used Power Service, and Howe's. They also provided good results. I just feel that Stanadyne makes my Duramax run better, just personal preference I guess!

Stanadyne Performance Formula in every tank.

Power Service is good and easy to find.