We specialize in high end foreign cars, mostly benz, BMW, and Porsche and we use either 10w30 motul or 5w30 LiquiMoly, both fully synthetic. It seems to be really good oil, and it meets the warranty spec for those guys, but i always like to get other peoples take on hard to quantify stuff like oil. A lot of people have opinions about oil and like the saying goes, most of them stink. So, any facts, numbers, personal experience would be great. Both my 230k toyota and 240k Tahoe use the sybthetic stuff and run great with it.