Quick answer
Choose an additive labeled for valvetrain or lifter noise, confirm compatibility, and add it at your next oil change or mid-cycle. Give the engine some run time—often a few hundred miles—to see if the tick quiets.
Detailed answer
Lifter tick often stems from inadequate oil flow or deposits around hydraulic lifters. A well-chosen additive dissolves gunk, improves lubrication, and frees sticky components. Start with a fresh oil change if possible, so the additive isn’t fighting contaminated oil. Follow the label’s instructions on how many quarts it treats. Then listen over the next few days or weeks—some improvements show quickly, while severe deposits might need more time or multiple treatments. If noise persists, a deeper mechanical check might be necessary.
