I don't think the formulation will be much different. The 99 protege has 130,000 miles with unknown maintenance history. Consumption is same as 5-30 M1, basically none. Dakota has 125,000 miles, no consumption. My daughter drives the Cirrus, it has 241,000 miles. With M1 HM 5-30, consumption is less than 1 qt in 6000 mile oci. I am changing over to 0-30 because it spends the winters outdoors in Grand Forks, ND without available plug in for engine heater. I anticipate consumption will not change much.