Pennzoil HM, 95% highway OCI?

[buck91]

Currently running a Pennzoil 5w30 "HM" in the Mustang which sees 145 mile round trip commute 3-4 times per week with probably another 50 miles of mixed suburban/highway driving. I'm not going to get an UOA as it'll cost as much as a fresh oil change, but what do you think would be a safe "max" OCI? Obvious I feel zero trepidation about going 5000 miles, but would 7500 be too much?

 

[crazyoildude]

that is my favorite summer high mileage oil.

 

[mjoekingz28]

Oil change every other month

Change transmission fluid, rear axle, coolant once a year.

 

[barkingspider]

I say change oil no later than every 7500 miles as long as no fuel or coolant mixing w oil.

 

[JC1]

Originally Posted By: buck91
Currently running a Pennzoil 5w30 "HM" in the Mustang which sees 145 mile round trip commute 3-4 times per week with probably another 50 miles of mixed suburban/highway driving. I'm not going to get an UOA as it'll cost as much as a fresh oil change, but what do you think would be a safe "max" OCI? Obvious I feel zero trepidation about going 5000 miles, but would 7500 be too much?


I know color isn't a real indication of the condition of the oil, but if the oil isn't very dark at 6000 miles, then I would keep an eye on it in 500 mile increments which isn't too long for you and then max it out at 7500. Highway miles are easy on the oil.

 

[Branson304]

I'd do every 5,000-6,000 on the Pennzoil High Mileage which would be about every 2 months for you. This oil could maybe go longer in your driving conditions but I wouldn't push it since it's a conventional.

 

[Rolla07]

Most of your commute is highway, easily change every 3 months. Id bet you could likely go further even..but i think once per 3 mont
hs would be easily safe.