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PRI-G Gas Treatment and Fuel Preservation 1 Gallon PRIG128

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Product InformationStore Part Number: PRIG128


PRI-G is a super concentrate; one gallon treats 2000 gallons and is a complete fuel treatment that improves any type of gasoline, enabling it to perform to maximum potential. PRI-G’s industrial strength, enhanced thermal stability chemistry reacts with fuel upon contact, and provides multiple benefits:
Engines perform better and last longer
Engine power increased and fuel economy realized
Fuel stays fresh months, even years
Hesitation, knocking, and pinging reduced

Improved Engine Performance – PRI-G works chemically within all gasoline to improve the combustion process. Improved combustion means improved engine performance. You will realize increased power from your engine. At the same time, you will enjoy greater fuel economy. PRI-G reduces the hesitation, knocking, and pinging that is common in gasoline engines. It is also extremely effective at cutting harmful emissions. Smog tests are no longer a challenge.

Reduced Maintenance Costs – PRI-G’s proprietary, refinery-grade chemistry is unsurpassed at preventing carbon deposits and fuel system fouling. Your engine will remain cleaner and last longer, which means maintenance costs are significantly reduced. Keep your car, boat, or RV in great shape for years to come!

Extended Storage Life – Properly treated with PRI-G, your gasoline will stay fresh in storage for months and even years at a time. Super Concentrate PRI-G Complete Gasoline Fuel Treatment You’ll be assured a fast start next season simply by treating your fuel with PRI-G prior to storage. PRI-G goes a step further, actually restoring old fuel to refinery-fresh conditions. If you are storing gasoline for any period of time, you can’t afford to be without PRI-G.

Super Concentrated – PRI-G is super concentrated, treating fuel at a 1:2000 ratio. This means PRI-G is extremely cost effective to use. Get the most out of your gasoline for only pennies a gallon!

Safe To Use – PRI-G’s enhanced thermal stability chemistry works within the fuel instead of altering it, which means the product is completely safe to use. Fuel specifications aren’t changed, so engine warranties are not voided! PRI-G is safe and effective in both four stroke and two stroke engines. Use PRI-G today to get the most out of your gasoline and your engine.

This product has been used by industrial fuel customers for years, although not widely known in the consumer market it is the best fuel treatment available no matter the price. I have personally used both the PRI Diesel and Gasoline treatments since 1993 and have never encountered a fuel related problem in any of our equipment since that time. We feel that one of the greatest assets of PRI Fuel Treatments is the long term fuel storage and the ability to recover old stored fuels. If you have used Sta-Bil you will find that PRI is a far superior product and less costly per gallon to use.


  • Improved Engine Performance
  • Reduced Maintenance Costs
  • Extends Fuel Storage Life
  • Super Concentrated - treating fuel at a 1:2,000 ratio.
  • Safe To Use - With PRI no fuel specifications are changed, therefore PRI meets all major engine manufacturer fuel specifications – warranties are not voided!


*Available within the Lower 48 United States and Canada only.

Tech Specs

  • Weight: 7.0 lb
  • Shipping Weight: 8.0 lb
  • Manufacturer: Power Research Inc/PRI
  • Manufacturer Part #: PRIG128
  • UPC: 793750617375
  • Made In: USA

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Reviews and Ratings

4.75 Average
5 Stars 3
4 Stars 1
3 Stars 0
2 Stars 0
1 Stars 0
Rated 4.75/5 Stars from 4 customer reviews.

Do you own the PRIG128? Please, tell us what you think about it. It helps us provide you with better products. Please note that it may take up to 72 hours for your review to appear.

Recent purchasw
Pros: Happy Customer! Great company to trade with. Have used them for years for my PRI products. Fast shipping, fair price. No mistakes. Can't get better than that.
Cons: non
I'll be back............
Is this review helpful?
Written by on Aug 10, 2014. Ownership: Use regularly. Knowledge Level: Electricity doesn't scare me.. usually — (120 of 198 customers found this review helpful
A safe and reliable product
Pros: I have a classic Uniflite boat in Arizona which has carburettors, and evaporating gasoline in 120 degrees is guaranteed to cause a carb rebuild every year. Our boat has been there since 2004, we have been using PRI-G since that time, and so far so carb rebuilds have been required - a tough test for a great product
Cons: none
there are other fuel preservatives, but this is probably the cheapest and most effective, one ounce treating 16 gallons
Is this review helpful?
Written by on Apr 22, 2017. Ownership: Use regularly. Knowledge Level: AC/DC is more than a band — (2 of 4 customers found this review helpful
Treats a lot of fuel
Pros: Filled three 55 gallon drums with non eth gas and treated the fuel with slightly over the recommended amount of PRI-g. Read the instructions before filling because you add the treatment to the container before adding fuel. One OZ for every 16 gallons of fuel. I plan on rotating the fuel every 3-4 years. Only time will tell. Will give it 5 stars if it works for four years.
Cons: None I can think of.
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Written by on Jan 20, 2015. Ownership: Just Bought. Knowledge Level: Electricity doesn't scare me.. usually — (2 of 4 customers found this review helpful
Best preservative on the market.
I've stored gasoline up to 6 years in 55gal drums using PRI-G.
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Written by on Oct 18, 2021.

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