Rated 4.93 out of 5 based on 172 customer ratings
(194 customer reviews)


8 oz
16 oz
1 qt
2 qt
1 gal
5 gal

Earn up to 462 Points.

international-iconNow shipping to USA, Canada, Australia
Increase fuel economy up to 5% with FR3 car oil additive
Reduction in oil operating temperature
 FR3 friction reducer reduces engine wear up to 43%
Improves oil’s oxidative stability
Friction reducer oil additive restores lost compression
Reduces lifter & valve noise
5 year shelf life

1.5 OZ / 1 QUART OIL

Recommended for ALL gas & diesel engines.

SKU: FR3 Category:

The Science

Hot Shot’s Secret FR3 is a lubricity enhancing oil additive that increases the lubricating & wear reduction properties of the host oil. The product contains patented synthetic lubricants that have unique lubricating properties even compared to PAO or mPAO synthetics of the same viscosity. The anti-wear component of the formula is a patented carbon nano particle that fills in microscopic irregularities on the machined surface to provide a smoother surface for the lubricating film to form. The synergy of these components extends the base oil performance in shear stability, oxidation stability, film strength & especially friction reduction.


Heat and friction silently steal power from your engine. The scientists from LSI Institute have uncovered a powerful lubricity agent…Hot Shot’s Secret FR3. One treatment of FR3 to your oil and your diesel will run cooler and have increased towing power. Negatively charged synthetic ester tenaciously attaches to all internal parts completely lubricating your engine.

Treatment Ratio

  • 5 quart (car): 8 ounces FR3
  • 15 quarts (truck): 23 ounces FR3
  • 45 quarts (semi): 64 ounces FR3

Add To:

  • Engine oil
  • Power steering
  • Hydraulic system
  • Differentials

Recommended Frequency:
Use one treatment of FR3 every oil change.

Use in All Engines:
Semi-trucks, pick-up trucks, farm equipment & autos. Effective in all engines including: Ford Powerstroke, Dodge Cummins, GM Duramax, Saab, Volkswagen, Audi. You can use FR3 to treat any oil-lubricated system except air conditioning and aircraft. Even though FR3 is an industrial product, you’ll find that small two cycle engines love it; just add FR3 to your oil before mixing it with the fuel. Your automobile, light truck or other personal vehicles will benefit from FR3 in the engine, power steering unit, and differential.

Tech Data

Tech. Data

Share your thoughts!

4.93 out of 5 stars

194 reviews

Let us know what you think...

2 reviews with a 5-star rating

  1. Mike

    5 out of 5


    I tried this product in my 2009 Honda Civic (155,000 miles). I was about 2,000 from my next scheduled oil change. The treatment only called for 8oz so i was able to just add it to my oil without draining anything. I instantly began to notice an increase in my fuel economy! I was averaging about 23 mpg before and now im up to about 27 mpg. I will definitely be using this product again after my next oil change! Hopefully my fuel economy will improve even more.

    (0) (0)

    Something wrong with this post? Thanks for letting us know. If you can point us in the right direction...

  2. thomas hornberger

    5 out of 5

    thomas hornberger

    I have 2010 ford f150 svt raptor I was getting 16mpg > 22mpg since adding hotshots friction reducer. this is amazing!!
    2007 mercury grand marquis was getting22mpg now I am getting 26mpg.
    2001 Lincoln continental was getting 19 mpg now getting 25 mpg.
    all engines so smooooooooth.

    (0) (0)

    Something wrong with this post? Thanks for letting us know. If you can point us in the right direction...




Continue as a Guest

Don't have an account? Sign Up

FREE SHIPPING on every order (Contiguous US, Exclusions Apply) SHOP NOW

+ +