Regular b/c when I change every 3 months the car has gone less than 2,000 miles. Only if I drove more between changes would I consider synthetic or synthetic blend.

Has anyone had trouble removing the washer under the oil drain plug? On my 1.8 '09 the washer doesn't want to come off, yet one is supposed to replace the washer each change. Any risk in prying off the washer with a screw driver? Any reason not to just use the old washer?