How often should I change synthetic oil in a 2002 Cadillac DTS?

I have a 2002 Cadillac DTS and I use Penzoil full synthetic 10W-30, and I was wondering how often you are supposed

to change the oil? I know its not every 3,000.How often should I change synthetic oil in a 2002 Cadillac DTS?If your vehicle has a change oil light (most GM's of that era do) - follow that.How often should I change synthetic oil in a 2002 Cadillac DTS?If you really want to know how the motor is doing, send a sample to Blackstone Labs and you'll get a run down of what's in the oil and how long you can run it for.How often should I change synthetic oil in a 2002 Cadillac DTS?5000-6000

applebees

unique baby girl names