<font color="blue"> If I were to use this Rotella or Power Service, would I still have to use a fuel stabilizer? </font>
No. Rotella, Power Service and Sta-bil all perform similar functions. However, I've always connected Sta-bil with gasoline and not diesel fuel. The Sta-bil web site says,
"STA-BIL® contains proprietary additives designed to reduce oxidation and metal corrosion of gasoline and diesel fuels."
Be sure to read the directions on the Sta-bil bottle before pouring it into diesel fuel. /forums/images/graemlins/smile.gif