Bruce381 wrote "I would think that this put into a 10w/30 oil will raise the cold vis to a straight wt range has anyone ever done a "freezer" test with and with out the normal dose of RX in the oil?
At the least I would think it will settle out and re mix when warm. If over used would it thicken the oil so much in cold temps that oil starvation could occur?"
My concerns were identical. Little voices in my head said why on earth would a guy in Florida test the effect on pour point and the like, below -10 F, even 0 or +10 F. I really sensed Frank Miller is a good, honest gentleman but many in Florida and a few other states have NO concern about anything that happens above the Mason-Dixon line, let alone The Dakotas, let alone Canada. I didn't do something dumb like challenge him on the board (or microwave a bottle on high, set the timer and go shopping
....but I ordered a pour point test on Auto-RX-mixed oil (GC 0W30, as I recall) and the pour point close to a year later were the same as the host oil when new. I'll even ad my own caveat. The PP test is accurate to plus or minus 5 C and is a painful $25. I am better off waiting for a -35 overnight low and taking samples from used oil and new virgin host and just getting a subjective feel for how well they flow. Or take a used vitamin bottle, clealiness wouldn't be a huge factor, and drain some of the used stuff (with Auto-RX) into it. Place it, and a bottle of the host oil in a plastic bag, which is in another plastic bag, depending on your wife's chances of finding this in the deep-freeze (chest-style freezer). Next day take out both and do a subjective test. Keep in mind the % full of each container will affect how much it glugs around and that might affect your subjective test. Or waste $25 on an inaccurate but objective test. Or put them in clear containers, straight from the freezer and put them side by side on a plank of wood, incline 5 degrees from horizontal, take pics or video to your hearts content. Whatever anyone likes.
I had doubt, and spent $ to show that Auto-RX affected pour point (and I agree, it makes sense that is would) and tests showed, Auto-RX had no impact on pour point. If I can run it in a
winter you can run it in an
winter.
BTW I have at least 4 year's supply of Auto-RX (unless my family changes their mind and wants it for Christmas. Not likely) and yet I just bought 6 more bottles of Auto-RX.
I hope this helps
Rob