we purchased our zinger in june and the "walk around" guy was great as far as showing us the ropes.
One thing he told us to do was pour an entire bottle of baby oil in our grey and black tanks, then fill with water and empty. Do this before ever using the tanks. He said it puts a coat of oil on the inside of the tank, lubes the sensors and reduces the chances of any problems. The logic made sense so we did it.
Jim and Christina
2003 Dodge 2500 5.7 HEMI
2010 zinger zt31sb