Blood is mostly made up of water, as are our organs and muscles. To read specifically about edema, swelling caused by fluid retention where excess fluid is trapped in the body's tissues, see our article Edema: Causes, Symptoms and Treatments.
If you use the Amsoil Ea15K01 and the ASM oil (For 3rd gen Prius), then you can safely go 15,000 miles between oil changes. I drive 25,000 miles per year in my Prius. Amsoil backs up their products by a written warranty.
We recommend that you change your oil and filter every 5,000 miles. That's our best estimate. It may be too soon for many people and too late for a few, but for the vast majority, 5,000-mile oil changes will help your engine last to a ripe, old age.hanging your own oil requires ramps or a jack and jack stands, a box-end wrench and something to catch and contain the oil. An oil and filter change involves draining out the old motor oil and replacing it with fresh, new motor oil.