Mark Hastings
SDD Junior Member
The dye is added to the Highway fuel not the off road fuel and the off road fuel has a red tint to it because of the high sulfur content,the highway fuel in most states now has a bit of a greenish yellow tint,and the highway fuel won't hurt the engine or fuel system because the company I worked at 7 yrs ago was filling trucks up at the shop with the off road fuel but then DOT would grab the truck and dip the tank and if it had even the smallest amount of off road fuel they would write a $20.000 fine and dead line the truck with a 2 ft x 2ft sticker on the windshield and we would have to pack up the service truck go out and pump the truck down and refill the tank.