 Improved or maintain your vehicle's performance with Lucas Fuel Treatment at O'Reilly Auto Parts. Simply add it to your tank at your next fill-up to eliminate carbon and varnish deposits. A clean fuel system can also maintain or improve fuel economy. Right now, get two bottles of Lucas Fuel Treatment for just $9. You'll also receive two times O'Rewards points to help you get to your next reward faster. In-store only at your local O'Reilly Auto Parts.