[Maroon 5.0 LX]

Oil doesn't really wear out. The breakdown of the additives and heat cause it to get funky.

I always change my oil at 3,000 miles, whether dirty or not. I can't personally justify the cost of synthetic oil for everyday driving. If you're racing or have a real hot running engine, I understand synthetics hold up better under very high temps.

The die-hard synthetic user may have a different outlook than mine, but that's why you have a choice.