Hi all, about a month ago, I bought a new 06 Suzuki Forenza with a GM/Holden 2.0L I4 engine. It replaced my 1990 Mazda 929S that had 230k+ miles on it. I drove it about 1200 miles and had the oil/filter changed at the dealer because it was free. I noticed that the car specs 5w30, but the dealer used 10w30... no big deal I suppose, but needless to say it will not be returning to the dealer except for warranty work or things that I can't do myself. Anyhow, I now plan to drive to 5000 miles, and then start using Schaeffer 5w30. There is a local shop in town that has/uses that product. I will also switch to Pure-One Filters. Anyone have any experience with these GM/Holden engines? They seem to run pretty well.