Rochester drivers who fill up at local stations, especially the Costco location many residents frequent, should stop the habit of adding a few extra gallons after the pump clicks off. The practice, known as “topping off,” can harm a critical component of the vehicle’s emissions system.

What the pump’s click means

When the fuel pump clicks, it signals that the tank has reached its designed capacity. Adding more gasoline after that point forces fuel into the onboard refueling vapor recovery (ORVR) system, a charcoal canister that captures fuel vapors during refueling.

Why the ORVR system matters

Consumer Reports explains that the ORVR system is built to last the life of the vehicle. Overfilling the tank can saturate the charcoal canister with liquid fuel, rendering it unable to absorb vapors. When the canister fails, the check‑engine light may illuminate, and the repair can cost hundreds of dollars.

Real‑world examples

One Rochester resident recalled watching his grandfather’s car develop performance issues after repeatedly topping off the tank. The vehicle required a replacement of the vapor recovery canister, confirming the warning from experts.

Practical advice for drivers

To avoid unnecessary repairs, stop the pump as soon as it clicks. If you want to round up to a whole dollar amount, consider waiting until the next fill‑up rather than forcing extra fuel into the tank. The small savings in fuel cost are not worth the potential expense of a vapor‑system repair.

Additional resources

Consumer Reports provides further details on the ORVR system and its maintenance. Drivers can also consult their vehicle’s owner manual for manufacturer‑specific guidance on fuel tank capacity.

By following these simple steps, Rochester motorists can protect their cars, keep their fuel systems functioning properly, and avoid unexpected repair bills.

Original reporting: News Talk 1340 KROC-AM – News and Talk – Rochester News Radio — read the source article.