No it's not too late! You can change from regular oil to synthetic. If you don't drive it hard, then I recommend Mobil 1. It's good stuff for everyday driving. I use Motul since I love to make my beast tear up the roads...
<img src='http://img43.exs.cx/img43/275/Resize.jpg' border='0' alt='user posted image' />
Body: 318i 4 door
Mods: M50 engine, Jim C chip, light-weight flywheel, dual cat-back custom exhaust, 3:15 lsd, euro headlights w/angel eyes, 5300K HID, smoked corner lights, FK Motorsports foglights (crystal clear), ABS plastic upper eyebrow, clear side markers, M3 powered side mirrors w/LED, blacked out grill, M3 lighted shift knob, 17" ROH Furry wheels w/Kumho tires, Brembo cross drilled rotors and Hawk performance brake pads all around, PSS9 Bilstein and H&R coil over kit, front strut bar and Alpine alarm.