Coupons are good until the expiration date listed on the individual coupon. The expiration date is generally found at the top of the coupon.
When searching for oil change coupons simply go to retailmenot.com, and search for oil change coupons there. One website that has coupons for this is coupons.com
You can find some coupons for a complete oil change at groupon.com.
Oil change coupons can be found in many different places. If you have an Entertainment book you can get oil change coupons there. Also depending on what day you take your vehicle for an oil change you can also get a discount. Printable oil change coupons are also available on the internet.
Companies that offer oil change coupons are usually companies that charge a lot to change your oil. I know that Midus Muffler does the coupons sometimes.
No you can not. Most of the time oil change coupons are on a specific type of oil. You will not be able to pick the oil that you want.
Midas does offer oil change coupons. In order to get these coupons you need to sign up for email updates.
There are certain coupons that never expire, such as store credit, gift cards, and some manufacturer's coupons.
If you need an oil change and want to find coupons in the Portland area, you can check inside your mailbox for those coupons. Usually they give out those coupons weekly.
Coupons expire at some point in general. I don't think it really makes much of a difference what the coupons are for.
There are many online shops that sell oil change coupons. Amazon.com is one of online shop that sells oil change coupons for any kind of cars. You can visit www.amazon.com
This "Mommy Saves Big" website is a great option for printable oil change coupons as well as many other useful coupons.- http://printable-coupons.blogspot.com/2005/11/oil-change-coupons.html
The best places to find oil change coupons are on the car service store websites, mailed out fliers, and sometimes you can find oil change coupons at the grocery store (they are catalinas printed out at the register).