No, I'm not experiencing anything that would make me want to change oils except for the price! I thought I read somewhere that changing to a 10w-30 might be beneficial in higher mileage vehicles so I figure I would ask and get some feedback before I just changed without reason. Pennzoil UP is more expensive, and harder to find so I thought about switching to mobile one HM, they say its for over 75k miles. I'm just looking to prevent any problems and save a little money. Ive been doing some reading and it seems switching to 10w-30 may not be the best option if I don't see a need to but I figure i would switch to a high mileage synthetic as a preventative measure since they are all listed for vehicles over 75k and Pennzoil doesn't have a full synthetic HM, and they're more expensive. I am thinking about trying Mobile One HM 5w-30 and sticking with that.