Are you looking for the best engine oil additives?
Discover top picks like Lucas Oil and STP, proven by real users to boost engine performance, cut friction wear, and save on fuel for a smoother, more powerful ride.
Engine oil additives boost engine performance and cut friction wear. Many drivers share how they see less noise and more power. This guide picks the best products from real tests and reviews.
Trust our deep checks on top additives like Lucas Oil and STP. You’ll find clear steps to pick the right one for your car.
Ready to save on fuel and fix old engines? Dive into our picks to see big changes in your ride. Let’s explore how simple bottles like Liquid Moly can transform your driving.
List of Top 10 Engine Oil Additives
| Image | Title | Best For | Price |
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Liqui Moly MoS2 Anti-Friction Engine Treatment | 300 ml | Oil additive | SKU: 2009 |
This oil additive is perfect for car owners who want to make their engines run smoother and feel more controlled at high speeds. It’s ideal for drivers of sports cars or anyone who wants to keep their vehicle in top shape with less wear. |
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Prolube Oil Treatment – Engine Oil Additive for Gas & Diesel Engines – Reduces Wear, Noise, Vibration – Boosts Fuel Economy & Horsepower – Works on Transmissions & Differentials (16oz) |
This oil treatment is perfect for car owners who want to boost power, cut engine noise, and save on fuel in their daily drives. It’s also great for truck drivers and heavy-duty users needing to reduce wear and extend engine life for any gas or diesel vehicle. |
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Prolube Oil Treatment – Engine Oil Additive for Gas & Diesel Engines – Reduces Wear, Noise, Vibration – Boosts Fuel Economy & Horsepower – Works on Transmissions & Differentials (1QT) |
This oil additive is perfect for car owners, truck drivers, and anyone running heavy machinery who want to quiet noisy engines, save on gas, and keep their vehicles running longer and stronger. |
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Lucas Oil 10001 Heavy Duty Oil Stabilizer – 1 Quart |
This oil stabilizer fits pros and everyday drivers who push engines hard in tough spots like jobsites or off-road. It’s great for anyone wanting long-lasting engine care without hassle. |
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Lucas Oil 10118 High Mileage Oil Stabilizer – 1 Quart |
This Lucas Oil High Mileage Oil Stabilizer is perfect for drivers with older cars that have worn engines, as it lubricates all internal parts to cut down on wear and stop the noise, smoke and oil use that old engines often have. |
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STP Ceramic Oil Treatment, Protective Coating and Anti-Friction Technology, 15 Oz (19387) |
This STP Ceramic Oil Treatment is perfect for car owners who want to protect their engine longer and make it run smoother. It’s great for drivers looking to boost gas mileage, gain more horsepower, and cut down on emissions without extra work. |
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Bar’s Leaks 1000 High Mileage Engine Repair, 16.9 oz | Restores Performance, Increases Compression & Horsepower, Stops Leaks, Noise & Smoking |
This product is perfect for drivers of older cars with high mileage who need to fix engine problems like leaks, noise, and smoking without spending a lot on repairs. It’s also great for anyone wanting to boost their vehicle’s power and performance quickly and easily. |
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Rislone 4102 XTREME LUBE® Maximum Performance Engine Treatment, 16.9 oz. |
Rislone XTREME LUBE is perfect for car owners who want to fix noisy engines and stop sludge build-up. It helps drivers keep their cars running smooth without big repairs. |
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LIQUI MOLY Motor Oil Saver | 300 ml | Oil additive | SKU: 2020 |
This engine oil additive is perfect for car owners who drive older vehicles with problems like oil leaks, high oil use, or smoky exhaust. It helps fix seals, cut down on oil waste, and keep the planet clean without much work from you. |
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BestLine Racing – Engine Oil Additive for all Gas & Diesel Engines – Reduces Wear, Noise, Vibration – Boosts Fuel Economy & Horsepower – Made in the USA, Treats 5-quarts of oil. |
This oil additive is perfect for people who drive cars, trucks, motorcycles, or any gasoline or diesel engine and want to cut down on engine wear, noise, and fuel costs while getting more power and longer oil life. It’s great for daily drivers, racers, and classic car owners who change their own oil and care about keeping their engines running smooth and strong. |
Detailed Reviews
We picked the top 10 engine oil additives using expert tips and real user reviews. Each product gets a full test on its features, how it performs, and its true value. No matter what you need, like a smoother ride or a good deal, this guide points you to the best for your car. Look inside to spot the additives that make a real change and choose one that works for you.
1. Liqui Moly MoS2 Anti-Friction Engine Treatment | 300 ml | Oil additive | SKU: 2009
Liqui Moly MoS2 is a motor oil additive that fights friction in your engine. It creates a strong film that protects all moving parts.
This universal fit product mixes right into your engine oil. Your car’s sound gets smoother, and control stays strong even at high RPM.
You will see big changes in how your engine performs. It handles heavy loads like a pro. The flash point is 181 degrees Celsius for safety.
| Pros | Cons |
|---|---|
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Perfect For:
This oil additive is perfect for car owners who want to make their engines run smoother and feel more controlled at high speeds. It’s ideal for drivers of sports cars or anyone who wants to keep their vehicle in top shape with less wear.
Ready to Purchase?
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2. Prolube Oil Treatment – Engine Oil Additive for Gas & Diesel Engines – Reduces Wear, Noise, Vibration – Boosts Fuel Economy & Horsepower – Works on Transmissions & Differentials (16oz)
Give your engine a boost with Prolube! It will enhance your car’s horsepower. It also reduces noise and vibration.
Prolube helps save on fuel costs. The special formula decreases friction. Your engine will run more efficiently.
Prolube extends your engine’s life. It works on gas and diesel engines.
| Pros | Cons |
|---|---|
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Perfect For:
This oil treatment is perfect for car owners who want to boost power, cut engine noise, and save on fuel in their daily drives. It’s also great for truck drivers and heavy-duty users needing to reduce wear and extend engine life for any gas or diesel vehicle.
Ready to Purchase?
3. Prolube Oil Treatment – Engine Oil Additive for Gas & Diesel Engines – Reduces Wear, Noise, Vibration – Boosts Fuel Economy & Horsepower – Works on Transmissions & Differentials (1QT)
Prolube Oil Treatment makes your engine run smoother. It boosts horsepower and cuts down on noise. This additive also smooths out vibrations.
Save money with less fuel use. The formula reduces friction for better engine work. It keeps your engine from getting too hot.
Use it on gas or diesel engines plus transmissions. Just add 1 oz per quart for standard jobs or 2 oz for tough ones.
| Pros | Cons |
|---|---|
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Perfect For:
This oil additive is perfect for car owners, truck drivers, and anyone running heavy machinery who want to quiet noisy engines, save on gas, and keep their vehicles running longer and stronger.
Ready to Purchase?
4. Lucas Oil 10001 Heavy Duty Oil Stabilizer – 1 Quart
Lucas Oil 10001 is the world’s #1 oil additive. It keeps engines running smooth and strong. Try it today.
This oil stabilizer works in new engines. It is trusted by pros for tough jobs.
It offers multi-use versatility. You can get it in 1-quart or 1-gallon bottles.
| Pros | Cons |
|---|---|
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Perfect For:
This oil stabilizer fits pros and everyday drivers who push engines hard in tough spots like jobsites or off-road. It’s great for anyone wanting long-lasting engine care without hassle.
Ready to Purchase?
5. Lucas Oil 10118 High Mileage Oil Stabilizer – 1 Quart
Keep your engine running like new with Lucas Oil 10118 High Mileage Oil Stabilizer. This 1 quart bottle adds deep lubrication to all internal parts in any engine. It fights wear and keeps things smooth.
Say goodbye to noise, emissions, and oil loss from worn engines. Grab a bottle today to boost your ride’s life and performance.
| Pros | Cons |
|---|---|
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Perfect For:
This Lucas Oil High Mileage Oil Stabilizer is perfect for drivers with older cars that have worn engines, as it lubricates all internal parts to cut down on wear and stop the noise, smoke and oil use that old engines often have.
Ready to Purchase?
6. STP Ceramic Oil Treatment, Protective Coating and Anti-Friction Technology, 15 Oz (19387)
STP Ceramic Oil Treatment adds a strong ceramic coating to your engine. It stays in place even after oil changes. Your engine stays safe for up to 15,000 miles.
This product uses anti-friction technology for better oil flow. Your engine runs smoother and makes less noise.
The protective coating stops bad deposits from forming. It also removes old sludge. Use it with any oil in gas or diesel cars.
It boosts your gas mileage and horsepower. Your car runs cleaner with fewer emissions.
| Pros | Cons |
|---|---|
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Perfect For:
This STP Ceramic Oil Treatment is perfect for car owners who want to protect their engine longer and make it run smoother. It’s great for drivers looking to boost gas mileage, gain more horsepower, and cut down on emissions without extra work.
Ready to Purchase?
7. Bar’s Leaks 1000 High Mileage Engine Repair, 16.9 oz | Restores Performance, Increases Compression & Horsepower, Stops Leaks, Noise & Smoking
Bar’s Leaks 1000 brings back life to old engines that have seen better days. It fixes common oil issues with special additives right away. Your ride runs smoother and stronger without big repairs.
Add it to your oil when it’s low or during a change. It stops leaks, quiets noise, and cuts down on smoke for good.
| Pros | Cons |
|---|---|
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Perfect For:
This product is perfect for drivers of older cars with high mileage who need to fix engine problems like leaks, noise, and smoking without spending a lot on repairs. It’s also great for anyone wanting to boost their vehicle’s power and performance quickly and easily.
Ready to Purchase?
8. Rislone 4102 XTREME LUBE® Maximum Performance Engine Treatment, 16.9 oz.
Keep your engine running smooth and strong with Rislone 4102 XTREME LUBE Maximum Performance Engine Treatment. This 16.9 oz. bottle fights friction, wear, sludge, and noisy parts to boost performance right away.
Try it now and feel the difference in your ride. It cleans deep to remove harmful deposits while protecting over broad temperatures. Plus, it’s made in the USA and won’t void warranties.
| Pros | Cons |
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Perfect For:
Rislone XTREME LUBE is perfect for car owners who want to fix noisy engines and stop sludge build-up. It helps drivers keep their cars running smooth without big repairs.
Ready to Purchase?
9. LIQUI MOLY Motor Oil Saver | 300 ml | Oil additive | SKU: 2020
LIQUI MOLY Motor Oil Saver is a great product. It helps to reduce oil use. This product is easy to use.
It also stops leaks in your engine. Your engine will run better.
The Motor Oil Saver keeps your engine clean. It helps the environment, too.
| Pros | Cons |
|---|---|
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Perfect For:
This engine oil additive is perfect for car owners who drive older vehicles with problems like oil leaks, high oil use, or smoky exhaust. It helps fix seals, cut down on oil waste, and keep the planet clean without much work from you.
Ready to Purchase?
10. BestLine Racing – Engine Oil Additive for all Gas & Diesel Engines – Reduces Wear, Noise, Vibration – Boosts Fuel Economy & Horsepower – Made in the USA, Treats 5-quarts of oil.
BestLine Racing is an engine oil additive that cuts wear, noise, and vibration in your vehicle. It boosts fuel economy and horsepower while working for gas and diesel engines.
This concentrated formula cleans sludge and protects against heat up to 1,800°F. It acts like tiny ball bearings to smooth surfaces and lower friction by 60%. One bottle treats 5 quarts of oil.
Use it at every oil change to keep your engine running smooth. Restore power and life to high-mileage vehicles with this USA-made treatment.
| Pros | Cons |
|---|---|
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Perfect For:
This oil additive is perfect for people who drive cars, trucks, motorcycles, or any gasoline or diesel engine and want to cut down on engine wear, noise, and fuel costs while getting more power and longer oil life. It’s great for daily drivers, racers, and classic car owners who change their own oil and care about keeping their engines running smooth and strong.
Ready to Purchase?
Buying Guide
Engine oil additives can boost performance and cut wear. Many drivers see quieter engines and better fuel use. This guide helps you pick the best one for your car.
One driver said, “After using Liqui Moly MoS2, my old truck runs so smooth. The noise dropped a lot at high speeds.” Another shared, “Prolube made my diesel engine feel new. I save fuel and pull heavy loads easier.” A third added, “Lucas Oil stopped the leaks in my high-mileage car. It lasts through oil changes.”
- Engine Type: Pick an additive for gas or diesel engines. Some work on both for wide use. Check if it fits your car’s needs.
- Friction Reduction: Look for products that lower friction in moving parts. This cuts wear and boosts power. It also makes your ride smoother.
- Noise and Vibration: Choose one that quiets engine noise. It can end shakes from worn parts. Drivers report quieter drives.
- Performance Boost: Select additives that add horsepower and speed. They help restore old engines. Expect more control at high RPM.
- Fuel Economy: Go for ones that cut fuel use. They make engines run efficient. This saves money on gas.
- Leak and Wear Repair: Find products that stop oil leaks. They fight sludge and deposits. This extends engine life.
- Compatibility: Ensure it mixes with your engine oil. It should be universal for easy add. This protects all parts.
- Size and Dosage: Check the bottle size like 16 oz or 1 quart. Follow the dose per oil quart. It makes it simple to use.
- Brand Trust: Pick from known brands like Lucas Oil or Liqui Moly. They have real tests and reviews. This gives peace of mind.
- Durability: Choose one that lasts through oil changes. It keeps working for miles. Long-term protection is key.