scottz wrote:
Use windshield washer fluid in the toilet (cheaper than RV antifreeze.
I'd be concerned about using WWF if the drive was very far or the tanks weren't going to be dumped right away. It's basically a 50/50 blend of methanol or ethanol and water. The alcohol is very quick to evapourate when exposed to the air. Given the large surface area of liquid in a grey or black tank and the sloshing effect and draw on the vent stack while driving I would think you'd have straight water in relatively short order.
