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high mileage oil weight?

62744 Views 18 Replies 9 Participants Last post by  Truck Guy
I have a 2011 silverado 5.3L which I got around 80k miles. Ive been running Pennzoil Ultra Platinum 5w-30 Synthetic since I got it. I was looking into running a high mileage synthetic like mobile 1 high mileage full synthetic but wasn't sure If I should stick to the factory recommended 5w-30 or Ive read that some people change the oil weight in high mileage vehicles. What do you think? I have about 97k miles on it now.

Thanks in advance for your suggestions.
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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.
Thanks for the input. I typically buy my oil from Pep Boys Website (even though I wont take my truck to their store) because they are always offering coupons and promos every couple of months and I usually get a good deal if I buy my oil in advance. Right now they have 25% off $50 or more. I just bought 6 qts Mobile 1 HM Synthetic and a mobile 1 oil filter for $58 w/ free shipping! Hard to beat that. I just check their website every couple of weeks for a promo and it usually pays off.
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