Vehicle just not running up to par? Maybe it's time for a tune up. Click over to Advance Auto Parts for everything you'll need to keep that car or truck in tip top shape and save 20% off any purchase while you're at it with coupon code OC12. Plus, place an order of $100 or more to qualify for a free coupon that will knock $50 off a future order of $100 or more. From oil filters and windshield wipers to headlights and spark plugs, they've got what you're looking for. Coupon expires 10/14/2012.