Are there any members on this board that run GC 0W-30 in their 3800 Series II V6 ? This is a General Motors 3.8L V6 introduced in 1995 and produced through 2004. In 2005 the Series III was introduced, which is essentially the same engine except for fly-by-wire throttle control. These engines were installed in Pontiac/Olds/Buick front wheel drive cars. All replies would greatly be appreciated.