Hi Bill, for the last number of years we have been using Fuchs Titan GT1 synthetic which has the following specs: ACEA C3, ACEA A3/B4, API SM/CF, BMW Longlife-04, Ford M2C917-A, Mercedes Benz approval 229.31, Porsche, VW 502 00/505 00/505 01. It is a 5w40 and ... Login to read more.