Car: 2012 Toyota Camry Hybrid XLE Mileage on car: About 75K Typical OCI 7.5K to 10K Location: Raleigh suburb in North Carolina with hot summers and cold winters Drive pattern: 130 mile round trip runs 3 days a week with city driving rest of the days. So while the car does see engine start stops on the road, they are not as frequent as with city only driving. Typical Load in car: 2-3 adults Spec Oil by manufacturer: 0w20 I am running the last of my TGMO 0w20 stock in the car. I have a lot of stock of the gray 5qt bottle of Pennzoil Ultra 5W-20 SN from back when Walmart was clearing it off online (~2015). I am thinking of switching to the PU 5w20 gray bottle in the 2012 camry hybrid for summer so that I can use up the stock in the next few years. Questions: 1. Anyone tried the Ultra 5w-20 in the >2012 TCH? 2. Can I go the full 10K interval on the Ultra 5W-20 in the TCH given that it is a synthetic, or should I do 5K or 7.5K? Note that I am not asking whether PU 5w20 can do 10K OCIs in general but rather will it do a 10K OCI in a hybrid car that specs 0w20. In other words viscosity and shear stability in a hybrid application over a 10K OCI? I will be switching back to TGMO/M1EP 0w-20 in winters, so the questions above are for summer application only. Thanks.