After reading all of the info. of the many different topics, after switching brands of oil God knows how many times and my brief encounter with bypass filters, I have finally come to a conclusion: it seems we are all wasting entirely too much time and energy worrying about what kind of oil is in our engines/transmissions. I mean, think about it, does the average person worry or even care what kind of oil is in their engine? I'm not saying to use the cheapest garbage or disregard the required maintenance, but it seems with all the worrying and uncertainties about what's the best brand or whether to use sythetic or conventional we're creating more unecessary worry rather than just enjoying the vehicle. I know I'm not the only one when I say I've lost plenty of sleep over API certification and warranty issues regarding certain oils. So to make this simple and to take out all the worry and aggravation, I'm going to use 10w30 Penzoil with OEM filters changed at every 3k. Hey, this is what everybody else does and their cars last 200k or better without any major engine failures and besides, I'm sure I will be getting rid of my car before it reaches that mileage anyway. Good luck with all of your research and testing, but for me, I'm done worrying about oil. I've got more important things to worry about.