Review of PRI-G Fuel Stabilizer (Hands-Down the Best Available)

I had an opportunity this week to get my hands on a bottle of PRI-G fuel stabilizer, something I had been meaning to do for quite some time. For many, many years I’ve always used Stabil as my fuel stabilizer because it’s what’s been available locally. Sadly, PRI-G is difficult to find at times but you can certainly buy it online (such as on Amazon).

For a long time I’ve heard nothing but good things about PRI-G (or PRI-D for diesel fuel). From various reviews to expert opinions, I had to try it! Honestly, the only way I know to review it is to compare PRI-G to what I currently use, that being Stabil. The *best* way to review them would be to treat fuel and wait for years on end but I didn’t want to wait THAT long so following is the next best thing…

Let’s start with cost. An 16-ounce bottle of Stabil on Amazon costs a little over $6, while a 16-ounce bottle of PRI-G on Amazon costs about $32. A little math says that a bottle of PRI-G is over 5x as costly as a bottle of Stabil… so why in the world should I buy it?

Well, a single 16-ounce bottle of Stabil can treat 40 gallons of gasoline whereas a similar bottle of PRI-G can treat 256 gallons of gasoline, over 6x as much gasoline! For the cost conscious among us, that’s a good reason why.

Of course, PRI-G makes a variety of claims that I cannot vouch for but have no reason not to believe, including:

  • ideal for e-10 gasoline
  • provides greater power
  • improves fuel efficiency
  • prevents damaging deposits
  • contains no alcohol

As for me, they had me at “treats almost 6x as much gasoline” as compared to Stabil. I’ve also heard (I believe) from Steven Harris of that PRI-G can be used to restore gasoline that has “gone bad” though I haven’t tried to verify that claim either.

I can say that I’m ready to give it a shot. In fact, I’ve decided to use my current gasoline storage up over the next week or two and treat it exclusively with PRI-G instead from now on… and suggest you do as well.

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Author: Damian Brindle

How To Effortlessly Get Prepared For Emergencies Of All Kinds In Only 5 Minutes A Day... Fast, Easy, And Inexpensively... In Less Than ONE Single Month... By Following An Expert In The Field: Discover My 5 Minute Survival Blueprint And Get Prepared Today.

14 thoughts on “Review of PRI-G Fuel Stabilizer (Hands-Down the Best Available)”

  1. Several years ago was given about 3o gal of old dark diesel fuel. Maybe 10 years old.
    Put in a fair amount of PRI-D. Pumped it around in tank then poured some in glass jar.
    Sorry I didn’t take pics or make video. Next day the old fuel looked like new. Have since mixed it with some new diesel and run in tractors etc. No noticeable problems.

  2. I put stabil in my gas and let 2-echo leaf blowers,1-stihl chainsaw,1-echo grass trimmer,1-echo extendable pole Saw,and a Harley sit for almost 22-months they all started with no Problems even the batteries charged up.I,m a believer in gas stabilizer .

    1. Degraded fuel may run in the engine. At some point, however, complete “souring” occurs. The engine will not run after complete break-down of the fuel. But what is nearly as important to point out, is that fuel in the degraded condition, (still “fires” – enough to run the engine)leaves severe deposits behind which can do damage. There are “gum” and “varnish” deposits left by the degraded fuel, which cover the fuel system and combustion chamber parts, (that may get past the fuel filter). So even an engine running on such may find itself in need of some serious cleaning, (carb rebuild, Mechanic in a Bottle, Seafoam) to return to healthy running.

        1. Well, it means that the engine might not start the next time around. You’ll have to resort to what he mentioned (carb rebuild, serious cleaning).

  3. Not a scientist myself so only anecdotal here. I have a motor scooter that has been out of commission for two years. Put some pri-g in the tank, about a half ounce (overkill for a 3.2gal tank. Shook it up, once the untreated gas got run out of the carb and lines, I was able to get it to run good enough to bump the throttle fast and slow and have it actually run as good as it did when I parked it 2yr ago. It was running well then. Until the treated gas got into the line and carb it would only idle – poorly.

    So, this is not a scientific analysis. But, I “feel” it helped me out. Milleniumfly, have you had a chance to check your old gas? If it were me, I’d probably not thought ‘hey, I need to do that and followup on this post”so not holding my breath. There are enough accounts out there that I trust the stuff.

    1. Glad to hear it works that well. Personally, I’m into the habit of replacing stored gasoline within a year so I can’t answer your question since gasoline is usually expected to still be viable within a year.

  4. First, we are chemical engineers, and second, it is possible to restore the oxidation stability of stale gasoline or diesel fuel. This capability of PRI chemistry is easily demonstrated in independent petroleum testing laboratories. For gasoline, the test is ASTM D525. For diesel, the test is ASTM D2274. Some results are posted on our website.
    PRI-D has, in fact, been used to restore diesel fuel for many large industrial clients, including a public utility operating in seven states. It is also in use to stabilize supplies of emergency diesel fuel at several nuclear power facilities in the USA. Additionally, PRI-D is presently in use in more than 2,500 ocean going vessels worldwide, and it has also been verified under the EPA Heavy Duty Diesel test protocol at Southwest Research Institute. So in truth, it does not “take years” to see if it works. It takes independent laboratory testing, and countless numbers of these tests have been conducted on PRI chemistry over the past 25 years.

    The bottle side of our business is tiny compared to our bulk industrial sales. A big jump in sales in this sector makes only a small difference in our overall sales numbers, so fact is, it truly does not serve our interests to try to play on “fears” in the consumer market. That said, take one look at the evacuation of hospitals in New York and New Jersey following Hurricane Sandy. Fact is, the diesel gensets failed. More than half of such failures are atributed to fuel that has degraded in storage. We see this all the time. As a homeowner with my own generator, I certainly want to make sure the unit will work when the next hurricane hits Houston, where we work and live. As we see it, we have a responsibility to inform the public that this need not happen. So many years ago we began packaging our industrial formula into small bottles for consumer use.

    I encourage all here to visit our website and download thee documentation for PRI-G and PRI-D. Study the test results. Check out the meaning of the tests themselves, then draw your on conclusions.

  5. You cannot “restore” gasoline that has destabilized over time. Ask any petroleum or chemical engineer, and you will get the same answer. Any product that makes that claim is, at best, exaggerating to cash-in on over-zealous preppers.

  6. Doesn’t seem to be a review, just “I’ve heard”.
    A review would actually let us know if the stuff works by using it and seeing if it protects your fuel.

    1. Fair enough but if you had read the post you would see that I said the only true way to see if it works would be to wait years to find out. I guess I re-write it in a year or two… just need to remember to do so!

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