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The publicity release says the "Hybrid" version is a Walmart exclusive. It is currently $28 a 5-qt jug. The additive package is supposed to include an additive that reduces water in the oil, a problem for hybrids because they run the engine intermittently and as a result often have lower coolant and oil temps. That causes water (and fuel) to build in the oil. PR sheet says this hybrid version of Mobil 1 "...has a special additive designed to help keep water and additional contaminants away from critical engine parts. " https://www.businesswire.com/news/home/20230404006047/en/Mobil-1™-Introduces-Latest-in-Product-Innovation-With-Hybrid-Full-Synthetic-Motor-Oil https://www.mobil.com/en-cn/passenger-vehicle-lube/pds/ap-xx-mobil-1-hybrid-0w-20 They still recommend changing the oil at 1 year (or 15k miles).