[JRTJH]

There are many brands of RV antifreeze and I have no "brand preference". There are two types of RV antifreeze: ethanol or propylene glycol. I won't use ethanol and only buy propylene glycol antifreeze. It's a little more expensive (about $1 per gallon more) but it has less "aftertaste" and "aftersmell", is easier to flush from the system and seems to "remain liquid" longer than ethanol based antifreeze.