Synthetic is also very good if you put on a lot of miles quickly. If you typically change oil at the 3 month mark since you didn't get to 3K miles stick with normal stuff. If you hit 3K well before 3 months synthetic is nice since it typically doesn't break down until the 5-7K mark. I just finally made the switch and have been happy, you will be much happier since you do it yourself and that will save you some nice money compared to the $70 Valvoline charged me.
