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To download and print free coupons for synthetic oil changes, visit CarServiceCoupon.com, and then click the Oil Change Coupons link at the top of the page. The page lists current coupons for most major auto service centers, including Wal-Mart, Firestone, Jiffy Lube and more.


Find Walmart coupons online at Walmart.com. Hover the mouse over the Store Finder link at the top of the home page. Enter the ZIP code or city and state to find a local store. Select a store from the results screen and click the See Weekly Ad link.


Find coupons for an oil change by searching on couponing and deal sites, such as Valpak.com, CouponCabin.com or Groupon.com, as of 2015. These sites typically feature coupons and discounts for oil changes at a variety of national and local businesses. Another option is to search on the websites for


Signs that you need to change the synthetic motor oil of your vehicle include reaching the recommended mileage set by the synthetic oil manufacturer and difficulty starting up the engine in cold weather. Synthetic oil lasts longer than regular motor oil but costs two to four times more.


To change synthetic oil, drain the old oil out of the engine, replace the oil filter, and refill the engine with new oil. This is an easy piece of self maintenance to do at home, according to HowStuffWorks.


Walmart coupons are available at the official Walmart website. Simply click the Weekly Ads link at the top of the home page, and click the Coupons link. Filter coupon results by clicking the Category and Brand dropdown menus located near the Filter By prompt.


Walmart offers coupons that customers can use in its Canadian stores. Shoppers can find many coupons redeemable at Walmart stores in Canada online at Walmart.ca.


As of 2015, the price of an oil change at Walmart starts at $26.88, according to Walmart.com. Prices vary based on the store's location and the type of services performed during the oil change.


Customers can print coupons for Car-X Tire & Auto oil changes by visiting the Car-X website and clicking on the Coupons tab along the top navigation bar, according to Car-X Tire & Auto. Customers should first identify their location to access available coupons for their participating store.


Although most people still have the oil in their car changed every 3,000 miles, most experts suggest that synthetic oil only needs to be changed after 5,000 to 7,500 miles. However, some manufacturers list oil change intervals as high as 10,000 or even 15,000 miles when using synthetic oil.