Like many of the other people on this board, I am taking advantage of the $18 Q Horsepower with $10 rebate. I changed out the oil in my Kia 2.4 today and installed the Q Horsepower 5w-30 along with a Wix 51334. I normally use Mobil Clean dino and the OEM filters, so it will be interesting to see how this does. First of all, this oil smells different. It doesn't smell like any other oil that I have ever tried, and I have used most of the major brands out there along with several synthetics. It just has a strange aroma. But, I put that aside and dumped it in. The butt dyno says that the engine is running smoother with it in. Other than that I haven't noticed any big differences. This engine is sensitive to oil filter type used, so I will be listening for signs of any start up rattle, if there is, I will switch back to the OEM filter as I have a couple more lying around. Anyone else have any observations on this oil? I couldn't find a VOA.