Toyota engines do not need break-in oils. That was for flat-tappet engines of the long-gone past. Moreover, even the SAE 0W-8 oil today protects the valvetrain better than the SAE 20W-50 oil of the past.
I agree 100% on this one. Change the oil at 500-1000 miles using factory specified oil, not any "special" break in oil. No additives as well. It's not a bad idea to let the dealer do this with specific instructions to look for any fluid seeps or other new car defects.
I believe that the reason my Gen 3 Plug-in lithium battery lost very little capacity over 12 years, was because I did not plug it in often. I ran it in hybrid mode most of the time.
Our Hondas and this latest Toyota do have break-in period recommendations, in the Owner's Manual. That said, it's very simple, just take it easy on the brakes as much as possible, and avoid long highway road trips on flat terrain.
HV mode seems to want to keep the battery at near the same soc, so as long as you aren't keeping it at 100%, that seems like the battery would last forever. But I do look forward to using it in pure ev around town.
I bought the Prime specifically to use the EV mode as much as possible. That's where the payback and environmental benefits lie - I live in an area with cheap hydroelectric power and expensive gasoline combined with moderate speeds on most the roads i regularly drive. I would own a full EV but I wanted the gasoline hybrid optionfor long trips. I'm going to trust that Toyota has done a good job designing the battery for long life, even beyond the generous warranty period.
