I bought some oil from a retailer going out of business and when I opened it the oil had some type of participate developing inside. I talked to the rep over the phone and they said they would love to see what had developed inside the bottle and they would send me replacements no problem. I sent the bottle back to redline and they told me the oil was too old, but before saying that the guy says the oil doesn't really have a shelf life. I asked them for a replacement but they turned me down, instead they offered me a fifty cent discount on up to TWELVE bottles only. whoopeee! I even lost more money by sending it back to them for their own analysis. I don't support companies that don't even back their own products.