3. Buy organic fruits and vegetables (fertilisers and pesticides are based on oil more often than not). 4. Buy beauty products (shampoo, soap, make-up) based on natural ingredients, not oil. 5. Choose when possible locally produced, seasonal products (less transport involved). 6. Buy clothes made out of organic cotton or hemp - not from oil derivatives. 7. Use non-disposable items in picnics and summer festivals. As an idea, a full service oil change using Mobil Special oil (helps extend engine life) at a Mister Car Wash starts at $39.99 (may vary by location) and includes up to five quarts of oil and a new oil filter, multi-point inspection, vehicle lubrication, top-off service, and a free car wash. 2. Turn Down the Thermostat. It's obvious, but easy to forget when you are chilled. The lower you set your thermostat, the more heating dollars you'll save. In fact, for every degree you lower the dial, you'll save between 1 and 3% of your heating bill, reports the Department of Energy.