Best alternative to RV antifreeze.
We're trying to get an early start heading out west this year in April. We're going the South route out and North route back so we will experience some freezing snowy weather for sure. A mix of 50/50 ...
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rjsurfer wrote:RV antifreeze uses propylene glycol. The concentration (an therefore freezing temperature) may vary by region. Around here, they sell 1:1 (50 percent) mix, which is good to -20F, so you get 1/2 gallon of propylene glycol per gallon of antifreeze. But, it's intended to be used as provided, not diluted.
As I mentioned, sure I can use a couple of gallons of RV antifreeze in each 1/2 full tank (6 gallons antifreeze total) but carrying and resupplying them is a pain.
I'm just wondering if there is better more concentrated antifreeze that I could use instead, let's say a gallon or less?
You said you had 38 gallon tanks. If you add 2 gallons of 1:1 to a half full tank (19 gallons), you'll end up with about a 1:20 mix. A 1:5 mix (add over 12 gallons per tank) gets you +20F. That 1:20 mix you wanted - that won't do squat to keep things from freezing, maybe lower the freezing point a couple of degrees, so why even bother?
