kateee kateee is offline

Just adding my opinion Coby, it does not cost much and cannot hurt anything to take "extra" care.

WOW, don't listen to johnccc. Yes, if your car has high mileage you could use the high mileage synthetic. But follow GM guidelines and you should be fine. If you go let's say 3000 miles without ever adding a quart of oil then your car is in good shape. Because synthetic is a better oil it can last longer than conventional oils. Because it is more money you will want to keep it in as long as possible. My car has about 4000 miles at 60% so I take this time to change the filter and top it up. Last time it took maybe 3oz. Then I go all the way to 20% about 9000 miles the last time. Actually changed it around 17% because weather was so crappy at the time. Manufacturers of synthetic say their oil is good to 15 to 20 thousand miles. So even if you let it go until light comes on at 10% you should be good. If your car uses a lot of oil then check it more frequently and top it up as needed.