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    Post your latest oil change

    2018 Yukon Denali, 118k miles - DOD delete with Bryan Tooley racing cam and GM performance lifters - tuned by local shop Out: 8qts Pennzoil Ultra 0W-40, 7300 OCI Purolator Boss filter In: 8qts Valvoline Restore and Protect 5W-30 Purolator boss filter Oil analysis came back spectacular on...
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    2018 Yukon Denali 117,000 miles; Pennzoil Ultra Platinum 0W-40 7,300 miles - used oil analysis

    I haven’t paid that much attention to it but maybe I should. I know it’s a very temperature-sensitive transmissionmission because when it’s cold it slips quite a bit into up to operating temperature. I assume I can see the transmission temp in the menu on the gauge cluster?
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    2018 Yukon Denali 117,000 miles; Pennzoil Ultra Platinum 0W-40 7,300 miles - used oil analysis

    Mine is the standard wheelbase, not the XL. The XL version is available though.
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    2018 Yukon Denali 117,000 miles; Pennzoil Ultra Platinum 0W-40 7,300 miles - used oil analysis

    Good advice. Mine has the 10 speed so I know it’s finicky. Had some torque converter shudder but fresh fluid cleared that problem. Keeping an eye on it!
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    2018 Yukon Denali 117,000 miles; Pennzoil Ultra Platinum 0W-40 7,300 miles - used oil analysis

    Longtime lurker, first time poster. Thanks to everyone for all the knowledge. I’ve run samples of both 0W-20 and 0W-40. Currently running 5W-30 so I’ll have a sample of all 3. I live in south Louisiana so the warm viscosity is more important for me and I just want general protection and...
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