Best Engine Additive For High Mileage to Buy in 2022

Sometimes it might be quite difficult to find the best engine additive for high mileage. With every niche market offering so many different products, it makes sense that this is the case.

Unfortunately, this very fact can make it incredibly difficult to find the item that best suits your needs, which is why we’ve put together this engine additive for high mileage buying guide.

Our Favorites:

15 Top Engine Additive For High Mileage Reviews:

Bestseller No. 1
Bar's Leaks High Mileage Engine Repair, 16.9 oz
  • Increases Oil Pressure
  • Reduces Friction
  • Helps Clean Internal Parts
  • Quiets Noise
Bestseller No. 2
Rislone High Mileage Engine Treatment, 16.9 oz
  • Reduces friction and wear
  • Quiets noisy lifters and valves
  • Removes and prevents sludge
  • Add to engine oil anytime
  • Will not void manufacturer's new vehicle
SaleBestseller No. 3
High Mileage Oil Stabilizer
  • Package Dimensions: 28.956 H x 8.128 L x 8.382 W (centimetres)
  • Package Weight: 0.93 kilograms
  • Country of Origin : United States
  • Fit type: Universal Fit
Bestseller No. 4
Prolong Super Lubricants PSL11000 Engine Treatment - 12 oz. , White
  • Includes a Formula with Anti-Friction Metal Treatment Technology
  • Features Engineering Designed to Treat Metal Surfaces of Both Gasoline and Diesel Fueled Engines
  • Offers Molecules that Interact with Metal Surfaces and Chemically Bond to Create a Protective Layer that Reduces Damaging Friction and Heat
  • Offers to Protect the Engine Even when the Motor Oil is Not Yet Fully Circulating
  • Features a Formula Containing No Solid Particles Such as PTFE Resins, 'Molys', Zinc, Copper, or Graphite
Bestseller No. 5
High Mileage Oil Treatment, Stop Leak Formula for Cars and Trucks, 15 Oz, STP
  • One 15 fl oz bottle of STP High Mileage Oil Treatment + Stop Leak
  • ZDDP oil additive prevents wear to protect your high-mileage vehicle
  • High-viscosity formula creates a thick cushion between moving engine parts to reduce friction
  • Leak stopper helps prevent engine leaks, noises and smoking and helps to rejuvenate seals and gaskets
  • Add this oil treatment to engine oil during every oil change
SaleBestseller No. 6
Slick 50 750002 Recharged High Mileage Engine Treatment, 15-Ounce
  • High Mileage solution to protect against power robbing friction heat and wear
  • Restores performance in engines due to wear and oil consumption in older engines
  • Revitalizes seals to help stop oil leaks and prevent them from ever occuring
  • Powerful detergents to remove and prevent oil sludge, use during your next oil change or between changes to replace lost additive content
  • Powerful detergents to remove and prevent oil sludge, use during your next oil change or between changes to replace lost additive content
Bestseller No. 7
Rislone High Mileage 4 6 8 Compression Repair, 16.9 oz.
  • Restores lost compression
  • Repairs blow-by
  • Frees sticky rings
  • Viscosity improver
  • Use on any gasoline or diesel engine
SaleBestseller No. 8
Slick 50 Original Classic Engine Treatment with Ceramic Cerflon PTFE, SL-750017, 32 fl. oz, 1 Pack, White
  • Protects against power robbing friction and heat
  • Enhances oil durability
  • Cleans and prevents sludge
  • Use every oil change for maximum effectiveness
  • Lubricity of PTFE but with Ceramic Technology which means the best wear protection and the best thermal stability - Better than PTFE alone
Bestseller No. 9
High Mileage Fuel Injector Cleaner and Carburetor Cleaner Treatment, Bottled Lubricant for Upper Cylinder, 5.25 Oz, 2 Count, STP
  • Two 5.25 fl oz bottles of STP High Mileage Fuel Injector & Carburetor Cleaner Treatment
  • Fuel treatment additives help remove deposit buildups to save gas
  • Friction modifier in the fuel additive combats upper cylinder friction
  • STP fuel injector cleaner can help prevent hard stops, lost acceleration and rough idling for improved performance
  • Jet fuel serves as the carrier for the active ingredients, creating a high-quality additive for easy auto care
Bestseller No. 10
Liqui Moly (20002) Cera Tec Friction Modifier - 300 ml
  • Mixable with all commercially available motor oils
  • Stable even under high thermal and dynamic permanent loads
  • No deposits and absolutely compatible with all commonly used filter systems
  • Resists extremely high and low temperatures
Bestseller No. 11
TriboTEX Nano Oil Additive Car Engine Treatment: Add to Engine Lube - Makes High Mileage Cars Like New with a Synthetic Material (Treats One Regular Car, Truck, Tractor or Small Diesel)
  • GROUNDBREAKING: Made in the USA – TriboTEX is a revolutionary engine oil additive. It contains synthetic nanoparticles developed with funding from the U.S. Department of Energy, NASA, & the National Science Foundation.
  • QUIETER & SMOOTHER PERFORMANCE: Reverses wear in bearings by building a diamond-like carbon coating.
  • UNIVERSAL: Compatible with all types of motor oil and can be used in gas or diesel engines. Use for both old and new cars. It is an excellent engine booster.
  • EFFICIENT: Our masterfully engineered engine treatment improves fuel consumption and reduces engine noise. It is time to improve your engine and take your driving experience to a new level.
  • GUARANTEED QUALITY: We know you will be delighted with this ground-breaking technology. Our treatment comes with a 100% satisfaction guarantee.
SaleBestseller No. 12
Slick 50 41306032 Engine Treatment - 32 oz.
  • Compatible with all types of motor oil
  • Safe for all automotive gas engines, will not void manufacturers' warranties
SaleBestseller No. 13
Lucas Oil 10001 Heavy Duty Oil Stabilizer - 1 Quart
  • Extends oil and engine life
  • Virtually eliminates dry starts and excessive wear
  • Raises Oil Pressure
  • Will not sludge or varnish
  • Lowers engine temperature
Bestseller No. 14
TriboTEX Small Oil Additive Engine Treatment: Add to Engine Oil - Makes High Mileage Engines Like New with a Synthetic Material (Treats One Motorcycle, Lawn Mower, Generator) 4 & 2 Stroke
  • Contains synthetic nanoparticles developed with the U.S. Department of Energy, NASA, & National Science Foundation
  • Reverses wear in bearings by building a diamond-like carbon coating
  • Compatible with all types of motor oil and can be used in gas or diesel engines
  • Improves fuel consumption and reduces engine noise
  • Safe for wet clutches in motorcycles
Bestseller No. 15
Synthetic Engine Oil Treatment Additive Universally Compatible Performance Enhancing Reverses Engine Wear and Increases Vehicle Life and Mileage 8 Fl Oz by SHINE ARMOR
  • Optimal Engine Performance. Our performance booster engine treatment reverses wear in bearings by building a carbon coating, providing effective gas treatment for quiet, smooth and efficient performance. A cutting-edge, nanoparticle-based solution that works great for gas and diesel engines alike. It takes the properties of your host oil to the next level while preventing rust, oxidation & reduce friction.
  • Groundbreaking Formula Gear Oil. This revolutionary engine oil additive is eco friendly, made in the USA and contains scientifically backed synthetic oil nanoparticles to boost engine performance.
  • Universally Compatible. Our Engine Performance Booster oil treatment can be used in both gas and diesel engines, and old and new cars. Shine Armor's Oil Additive is compatible with all types of motor oil & engine oil like 5w30, 0w-20, 10w30, 5w20, 15w40 & more.
  • Quality Assured. We know you will be delighted with this ground-breaking engine additive technology. Our oil additive treatment is formulated using the latest technology and backwards-compatible with all vehicles.
  • Quick & Easy to Use. Effective in small two-cycle engines just add Performance Booster to the oil before mixing it with fuel. Use it to treat any oil lubricated system except air conditioning & aircraft. Use Performance Booster Oil Additive after getting a fresh oil change, or use it on the oil that you have now.

Last update on 2022-12-06 / Affiliate links / Images from Amazon Product Advertising API

How to find the best engine additive for high mileage?

Here, we’ll be going over a number of factors that you can use to ensure that you’re purchasing the best engine additive for high mileage for you.

Regardless of which type of item you’re looking to buy, chances are that there are existing buying guides on the internet, all of which aim to give you good engine additive for high mileage recommendations.

Despite these recommendations, however, it’s always a good idea to do your own research. In addition to this research, asking yourself the following questions is also super helpful:

  • What features does the engine additive for high mileage need to have to be perfect for my needs?
  • What is my budget?
  • Do I need to purchase a certain brand?

Once you’ve answered these questions and have a good idea of what you’re looking for and the buying process becomes much easier. Keep in mind that when looking for the best product, there’s no need to rush. In fact, very rarely are the ideal products found by choosing the first one you see or by basing your decisions on only one factor. Take your time and enjoy the process!

Now, with the answers to the previous questions in mind, we urge you to use our upcoming buying guide for engine additive for high mileage to find what you’re looking for:

Brand

In some cases, the brand of engine additive for high mileage is very important. For example, if you’re looking for an item that works in tandem with another, you might very well need both products to be the same brand. If this is the case, it’s vital to pay attention to this factor, as choosing the wrong product can mean the difference between wasting your money and buying a great product that functions as it should.

Features

The features in any given engine additive for high mileage are important because they can dictate which version of an item you need and how much money you need to spend. Consider all the key features that you want your item to have and don’t settle for anything that doesn’t check at least ¾ of your boxes.

Reviews

Customer reviews about engine additive for high mileage are crucial – especially when you’re buying a product that costs a lot of money or serves a big importance. Luckily, most products can be found online, which means that it’s common for there to be scores of customer reviews from those who have already purchased any given product.

Pay attention to these reviews. Take note of the pros and cons that they mention, and factor these into your big decision. In some cases, you’ll be forced to sacrifice one con in order to gain a particular pro, but being aware of the potential con is going to be beneficial in either case.

Quality

Of course, quality is key. You don’t want to purchase a low-quality product. If you do, you run the risk of your item breaking, not working properly, or otherwise proving to be very disappointing, as well as a waste of money.

You can compare engine additive for high mileage quality by researching what your potential purchases are made from, contrasting the individual items against each other to discern which one is made of the best materials.

Warranty

Warranty isn’t always going to be important, but it definitely can be. This is especially true if the item in question is tech-related or expensive. A good warranty will be valid for an extended time after purchase and cover a variety of problems ranging from item defects to random accidents, water damage, and other miscellaneous events that could ruin your product.

Conclusion

The quest to find the best engine additive for high mileage can be daunting – but it doesn’t have to be. It can be made much easier by asking yourself a few simple questions and then thinking critically about the items you want to buy. Consider their features, quality, brand, warranty, and customer reviews and you’re more likely to make a great purchase.