In good faith, you should obtain from the purchaser a timely and valid exemption certificate (partial or otherwise). Sample exemption certificates for each of the exemptions are available on the Board's website or through our Information Center at (800) 400-7115. To ensure that you are providing or receiving all the required information to support an exemption, we recommend that you use the applicable sample exemption certificates.
Most car manufacturers recommend that you change the radiator fluid in your vehicle every 24,000 to 36,000 miles, or every 24 to 36 months. However, your personal driving habits will also determine the frequency of needed radiator fluid changes.
1 The color of your coolant may be a first indicator that you have something other than traditional antifreeze in your vehicle; however, NEVER RELY ON THE COLOR TO DETERMINE WHAT TYPE OF ANTIFREEZE YOU NEED! 2  There are no standardized rules for manufacturers about what colors to use for their formulas.