Automotive Parts and Accessories

Top 10 Best Transmission Additive For High Mileage In [2022]

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Do you ever struggle to find the Transmission Additive For High Mileage to buy? If so, we have good news! Not only have we compiled a list of the 10 Best Transmission Additive For High Mileage on the market today, but we’ve also included a little bit of information about why we love each one. Keep reading to learn more about these great products and why they made our list.

We love each of these products because they’re all high-quality items that will last a long time. Whether it’s the perfect gift or something you need for yourself, there’s something for everyone on here!

Our in-depth product reviews always take that extra step, so that our users can be sure to only find the best, most reliable products. If you're curious to know more about any of these items, keep reading for all the info you need on each one.

Best Transmission Additive For High Mileage
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NoProductScoreAction
1Slick 50 750002 Recharged High Mileage Engine Treatment9.6Buy on Amazon
2Rislone High Mileage Transmission Stop Slip with Leak Repair9.6Buy on Amazon
3Lucas Oil High Mileage Car Kit9.6Buy on Amazon
4Bar's Leaks High Mileage Transmission Repair9Buy on Amazon
5Slick 50 41806015 Recharged High Mileage Automatic Transmission and Engine Treatment8.8Buy on Amazon
6TriboTEX Nano Oil Additive Car Engine Treatment: Add to Engine Lube - Makes High Mileage Cars Like New with a Synthetic Material (Treats One Regular Car8.6Buy on Amazon
7Lucas LUC10009 Transmission Fix 24 oz8.6Buy on Amazon
8K&W 402916X6 Trans-X High Mileage Automatic Transmission Treatment - 16 Fl Oz Leak Repair Solution for Automotive8.4Buy on Amazon
9Bestline Transmission & Hydraulic Systems Treatment - 12 Fl. Oz. - High Performance High Mileage Transmission Fluid - Lubricant Made with Nano Diamond Technology8.2Buy on Amazon
10Lucas Oil 10001 Heavy Duty Oil Stabilizer - 1 Quart8.2Buy on Amazon

Comparison Chart for Best Transmission Additive For High Mileage

After scouring the internet for user reviews, we were able to find the Transmission Additive For High Mileage. Hopefully, our expert’s suggestions available in this article will help you find your ideal choice.

Table Of Content:

1. Slick 50 750002 Recharged High Mileage Engine Treatment

  • 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.
  • This product is dispensed in 10W-30 which is a multi-grade oil but is fully compatible with all multi grade motor oils and mono grade oils.

2. Rislone High Mileage Transmission Stop Slip with Leak Repair

  • Restores performance
  • Quiets noise
  • Stops leaks
  • Stops slipping and prevents lazy shifting
  • Conditions seals and prevents future leaks

3. Lucas Oil High Mileage Car Kit

  • 4 outstanding products to help you maintain your high mileage vehicle!
  • High Mileage Oil Stabilizer
  • Complete Engine Treatment
  • High Mileage Fuel Treatment
  • Transmission Fix

4. Bar’s Leaks High Mileage Transmission Repair

  • Restores performance
  • Stops slipping and prevents lazy shifts
  • Quiets noise
  • Stops leaks
  • Conditions seals and o-rings

5. Slick 50 41806015 Recharged High Mileage Automatic Transmission and Engine Treatment

  • Helps eliminate transmission shudder
  • Restores ATF additive content and provides additional protection to transmissions
  • Prevents transmission leaks and aids high mileage transmissions by lubricating seals
  • Can be added anytime or while doing a transmission fluid change, leave adequate fill space
  • Helps erratic shift and loss of torque

6. 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

  • GROUNDBREAKING: Made in the USA – TriboTEX is a revolutionary engine oil additive.
  • 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.
  • EFFICIENT: Our masterfully engineered engine treatment improves fuel consumption and reduces engine noise.
  • GUARANTEED QUALITY: We know you will be delighted with this ground-breaking technology.

7. Lucas LUC10009 Transmission Fix 24 oz

  • Lucas Transmission Fix Stops Slip, Hesitation, Rough Shifting In Worn Transmissions And Completely Eliminates Most Seal Leaks.
  • Fit Type: Universal
  • Can be added to existing fluid without draining any out
  • Improves shifting

8. K&W 402916X6 Trans-X High Mileage Automatic Transmission Treatment – 16 Fl Oz Leak Repair Solution for Automotive

  • K&W SEALANTS & SOLUTIONS: From head gaskets and engine blocks to automatic transmissions and power steering, K&W products are made to stop leakage in aging vehicles.
  • TRANS-X LEAK REPAIR FLUID: Specially developed for vehicles with 75,000 miles or more, this automatic transmission fluid extends the transmission life, stops leaks, repairs leaks, prevents future leaks & restores smooth shifting.
  • APPLICATION RANGE: Our leak stop fluid is formulated to prevent and restore smooth shifting in vehicles with high mileage.
  • SAFE HANDLING: Highly flammable transmission stop slip must be stored in a well-ventilated place away from heat, sparks, and open flame.
  • PRODUCT SPECIFICATIONS: Trans-X High Mileage Transmission Fluid is available with 16 Fl Oz fill.

9. Bestline Transmission & Hydraulic Systems Treatment – 12 Fl. Oz. – High Performance High Mileage Transmission Fluid – Lubricant Made with Nano Diamond Technology

  • BOOST THE EFFICIENCY OF ANY TRANSMISSION OIL -Enjoy improved lubricant performance with our innovative transmission oil additive.
  • ENHANCES THE ADDITIVES IN ALL ATF FLUIDS – Enhance any manual transmission additive or transmission assembly lubricant by helping prevent the oxidation of the additives in all ATF fluids.
  • EXTENDS THE LIFE OF ALL AUTOMATIC TRANSMISSIONS – The anti-scuffing and anti-wear properties of nano-diamonds make this the perfect transmission fix for lubricants used in cars, race engines, motorcycles, and any other vehicles.
  • EASY AND ECONOMICAL MAINTENCE – Enjoy an overall improved driving performance and help reduce CO2 emissions by boosting the fuel efficiency of your vehicle with our effective transmission treatment additive.
  • TRUSTED QUALITY AND PERFORMANCE – All Best Line Racing products are proudly made in the USA by transmission professionals looking to increase the fuel efficiency and running power of vehicles while lowering your costs.

10. 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
  • For use in any engine, gasoline or diesel

Some Keys to Consider for Buying the Transmission Additive For High Mileage


Picking the perfect product can be stressful. Between choosing the right model and considering all the important features, it can be hard to know where to start. But don't worry, by focusing on these factors you can select a quality product from hundreds of options. See below:

Understand Your Needs


Before making any decisions, it is important to take the time to assess your needs. This will help you avoid investing in the wrong products or services at the wrong time. By taking the time to think deeply about your requirements, you can ensure that you are making the best decision for your situation. To make it easier, you can make a short list of your needs. This simple step will help you better estimate the costs involved. Only then can you be sure of your priorities.

Quality and Longevity:

Product Brand:


Our emotional attachments to certain brands can bias our decision-making. This method can yield positive or negative results, but there is no denying the appeal of relying on well-known brands. Having enough money to make choices easy is a luxury not everyone can afford, but please note that not all brands are created equal. Choosing the right product from the right brand is an important decision.

Budget vs. Cost:


Before you decide to buy anything, one of the most important issue to think about is budget. Any amount of price can be asked from you for the product you decided to buy. Besides their brand value, pricing also depends on different variables like raw materials, manufacturing costs, logistics and other operational costs as wel. You should be mentally prepared enough to spend that higher amount of bucks if you need a higher quality product. This is the reason, budget matters so much.

FAQs and Customer:


Before making a purchase, checking FAQs and customer reviews can save you time. FAQs are a list of questions that are commonly asked about a product. Customer reviews are stories or accounts written by people who have used the product and can share their experience. Reading both FAQs and customer reviews can help you make a more informed decision.

Warranty and Return Policy:


A lot of manufacturers are making products. Higher quality are being maintained by many of them. After then they are letting us know those products through making creative advertisements. All is okay. But then arrives the matter of Warranty and After Sales Service. You may take this thing lightly, but it can create a huge difference.

Final Thought


When it comes down to it, you have to decide if the price you're paying is worth the value the Transmission Additive For High Mileage provides. Does it make you happy? Does it fulfill your desires? That's what's most important.

We hope you enjoyed this buying guide and that it helps you purchase the Best Transmission Additive For High Mileage. We would be more than happy if it was of some assistance to you. Your satisfaction is our top priority.

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