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By Grumpy Bear · Posted
288,000 Mile Service 8/20/2026 3,020 OCI 5 Quarts Valvoline R&P 5W30 (round #2) Purolator L filter Timing cover seal has moved from a weep to a leak but still not leaving a spot on the ground. -
By Grumpy Bear · Posted
The do. HPL EC30 and EC40. Takes time just like any cleaning ester and it is an ester. -
By GMCustomerService · Posted
Your transmission concerns frustrating, @zibzer2. We encourage you to visit your local Chevrolet dealer, where the factory-trained and certified service team can properly diagnose your Silverado’s noise concerns as well as make any necessary repairs. Facing any vehicle concerns alone can be daunting, which is why we are here. We would be happy to provide an added layer of support between you and your dealer as we pursue the resolutions of your concerns. To get started, please visit: https://s.chevy.com/support-request and fill out the request form. The details you fill out will ensure that your request is routed accurately and allow us to explore the best path of assistance. We will keep an eye out for your outreach. -
So if I catch that correctly, really there are limited options to use that have the ability to reverse a mess created from too long of an OCI by using Wally World oils. Valvoline R&P being one and as of yet to be proven in real world use with the Mobil Clean. Doesn't HPL have a solution they offer as well as an additive to other oils or a certain oil type that is used as a whole to do a similar job to R&P ? -
The color pallet is such trash for GM trucks, actually disgraceful if you ask me!
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