You have to do what you feel comfortable with. I have been working on cars for years and have 3 engineering degrees but all I can do is tell you what I am comfortable with.FDNY600 said:My Merlot Jewel Terrain is my first GM vehicle with the oil life system. Would you guys recommend following the oil life system the Terrain comes with or just change my oil every 3months/3000 miles? Thanks
Short trips, not getting up to operating temps SHORTEN oil life, not extend it. Red lights have NOTHING to do with oil life.cheddar11 said:The system is based on engine temp, stop and starts and total running time. It is not based on how "dirty" your oil is. If you are taking short trips to work or the corner store, the engine doesn't get to full temp, thus extending oil life. But if you are driving around the city for some time with a lot of red lights it will decrease the oil life. I think it is a good indicator, but I wouldn't take it as gospel. The maximum length you should go between changes is 6 months if the system hasn't indicated to change.