Engine Additive and Cleaner

You want your engine to treat you well. Return the favor when you treat your engine to the best engine oil cleaners, additives, and treatments. From motor flushes and oil stabilizers to sealers and stop leaks, these powerful chemicals can help keep your ride at the top of its game. Get free shipping with next day delivery on select products or pick up your purchase today in an AutoZone near you.

Fight friction, heat buildup, and general engine wear with a top-notch engine oil treatment. These additives mix with your engine oil to change the oil's viscosity or other characteristics. They come in a few varieties, each of which is suited to dealing with different issues.

Most additives are viscosity index improvers, rust inhibitors, detergents, or dispersants. Viscosity index improvers alter the index of levels of viscosity that your oil reaches at different temperatures. Rust inhibitors, detergents, and dispersants help reduce rust and sludge build up inside the engine to keep your oil flowing smoothly.

Motor or engine oil flush is an engine oil cleaner that is used to remove sludge build up from the engine. It is different from many other additives in that it does not stay in the engine during operation. Instead, motor flush is generally added just before an oil change and run through the system by idling the engine. After the flush, the oil and oil filter can be changed like normal.

No smoke is an additive made to stop oil burning and reduce exhaust smoke and spark plug fouling. No smoke sometimes comes with stop leak and can reduce engine noise and restore compression by sealing the spaces between valves and guides, piston rings, and cylinder walls.

Older high-mileage engines can benefit from engine restorer, an oil engine additive that is geared to provide lubrication beyond the range of motor oil and restore compression.

Stop leak and sealer help seal leaks in O rings and other seals and gaskets by swelling the rubber seals to fill in any gaps where fluid might seep out.

Many of these additives are helpful when working on an old engine, but engine oil stabilizer and treatment can help any engine new or worn. These products enhance oil's properties to prevent sludge build up in your engine, potentially sparing you costly repairs down the road.

Whether you're looking to put some life back into an older engine or to protect a new one, we have engine oil additives from trustworthy brands like Lucas Oil and Seafoam. Check out how to use Seafoam to learn more about the brand. If you're wondering which additive is right for you, come to your local AutoZone and ask a store associate.