Just buy a big bottle and use it until it's gone, then switch. It's far cheaper than the little bottles, and it does pretty much all the same things as the grey bottle just with anti-gel in it that won't hurt anything in the summer.
Power Service White Bottle Shelf Life (From PS)
Figured this might help some people as winter begins to wind down... I use about 4-6oz of this stuff a week and will probably switch over to the grey bottle in 1.5 months or so when nights begin to stay above freezing most of the time. I am running low on the stuff and was trying to figure out if I should just get a few of those 16 or 20 oz (cant remember) white bottles or a big one and let some of it sit over the summer. I contacted PS and they told me the white bottle should be used in 2 years after it is opened (as a best practice) and has an indefinite shelf life while closed. So it sounds like it can sit for the summer and be ok next winter.
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Yeah, yeah.. I'll take this subzero weather any day over the heat you guys get! Now if I could only get the MPGs you are probably getting now!You can't even buy the white bottle here...
Not that I would EVER need it
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