I realize this is a bit pretentious, but I always like these end of year threads that end up with top lists on different forums for fun... like top 5 favorites games this year, or movies etc. Since oil obviously doesn't come out often enough, I'll just throw them all together, along with formulas and even viscosities can make a difference so I'll throw it in too. I'll start. My top 5 favorite oil formulations this year... 01.) Redline 5w40 (I like this version as it's the perfect weight and doesn't have the tons of Moly, which I'm not a fan of an oil having over 250ppm for reasons I won't get into here. It's a Group V ester based oil with a mix of Group IV to boot. One of the best priced boutique oils there is and you'd be hard pressed to find a better oil than this anywhere imo. I'm particularly impressed in this oils ability in direct injected high perfomance turbocharged cars and it's ability to help prevent intake valve deposits. I love it's super low NOACK rating too.) 02.) Rotella T6 5w40 (Inexpensive and stout as you know what. UOA's for this are almost always excellent, even on known oil shredding direct injected turbo's. Bang for your buck, really tough to beat this oil. If this was a jacket, it's a Carhardt) 03.) Mobil 1 0w40 European Formula (One of the all around greatest oils out there. With a spec sheet a mile long and a pedegree to back it up. Used as factory fill for so many european sports cars it's staggering. This oil, straight off the shelf, is used in many race cars during races such as 24 hour LeMans. This oil has an almost legendary status.) 04.) Castrol Syntec 0w30 European Formula (aka: German Castrol. This oil even has it's own dedicated thread here at bitog, which says something. Used to be green in color but now gold. One of the thickest 30 weight oils there is, almost 40. Thought to be mostly Group IV basestocks this oil does extremely well in so many high performance cars it's sort of a "go-to" oil for many. Often on sale at AutoZone and Pep Boys for great prices, as it is now currently.) 05.) Castrol Edge 10w30 (I like the additive package more than the 5w30 as it's a bit more stout. For me, this oil is the smoothest and in particular, very quiet. This is what made me like it so much, as it quiets down my wifes loud engine SUV to the point that when I took it out, my wife asked what I did to her truck. Doesn't have a lot of fanfare here, but it seems like those who have tried it have made the same comments as I have here.) Honorable Mentions: Royal Purple 0w40 (A newer formulation from the purple people. It has an SM rating. Those who have looked at specs say it matches up extremely closely to M1 0w40, which is a good thing. According to RP, this is a Group IV based oil with Group V "Synerlec" and some Group II for solvency I believe.) AMSOIL 5w40 Premium Protection. (I haven't had the chance to run this myself yet, but seen some very impressive UOA's of it on some very brutal on oil cars. I plan on giving it a go sometime soon).