Thank you to all for your suggestions and thoughts. Still, I'm not sure what I will do but this has given me a starting point with the different suggestions. I'm not too much of a dyi person but for a few simple things. Messing with the high voltage battery is something I'm not comfortable with. The 12-volt battery, I replaced in 2014. Oil (have always used synthetic) replacement is probably about 1/2 qt. every 500 miles. I can somewhat control the oil consumption by how I drive the vehicle with acceleration and running the engine hard but I'm one of those people who pokes around town and give Prius drivers a bad name, HAHA!
True, one new quart of synthetic oil every 1000 miles, after 4000 miles I've changed the oil basically!!!
Sorry, it doesn’t work this way. You still need to dump the oil periodically to drain off all the crud. If you don’t, you will eventually seize your engine.