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.
Steps for All Cars (Including the Prius) 1  1. Change your oil every 5000 miles. 2  2. Change your air filter every 30000 miles. 3  3. Avoid the use of your car's roof-rack, if it is supplied with one.  4. Change your spark plugs every 100000 1  miles. 5. Clean your fuel injector system every 3,000 miles (4,800 2  km). 6. Try to keep your acceleration steady.