I am posting this both here and on General Chat for maximum audience. Kinda important especially if you used Walmart brand antifreeze. If anybody else changes their own antifreeze, I suspect you have noticed it now comes either premixed or the kind you have to dilute with water. Without some rebate or special sale the traditional kind you dilute is best buy or so the price would indicate. I just changed mine Saturday. Had bought what was labeled as the add water kind from Walmart. Mixed it half and half which should give -30F protection. Well just on whim after changing it, I used one of those little ball type testers. Two ball with +5F protection. HUH?? Tested it again with different tester. Same. Apparently Walmart or their supplier decided to make some extra money by selling the premixed as regular add water type. Now it rarely gets below 0 degreesF here and even rarer that it stays below zero for any length of time so I am pretty safe, but still dont appreciate being ripped off and no real way to prove I was ripped off. If you used the tradition add water antifreeze this year, especially the Walmart brand, you maybe should check it with one of those cheap little ball testers. Lot cheaper than a busted radiator or even having to replace a buried freeze plug on engine. Hard to get to some freeze plugs especially on some modern engines.