Don't let the name fool you - best fuel additive available!
340750
Wow - this is very highly rated, and I gave it a try to clean the injectors in two of my cars.  Our cars already worked well so I didn't see a major difference in performance.  But, it gave me peace of mind knowing that the system had been cleaned.  This is rated as one of the best, if not the best, fuel additive for cleaning your fuel system.  I was happy to find it at a good price on Amazon, and the convenience of having it come to me was a plus.  Great additive - you won't go wrong.
471812
Numerous studies show this is the best type of additive available. If Tier 1 gasoline is not available in your area - or it is priced too high. This will clean your engine right up.
4460833
One of the best over the fuel additives out there for combustion alteration. You can actually feel the difference in drivability. I use this in personal vehicles, some customer vehicles during repair work for drivability, and even my lawn equipment and pressure washers.
3080713
would actually give it 4.5 stars if I could.....

I have alot of 2 stroke saws, etc and this stuff is excellent for running in tools that won't be run often or are going to be stored.

For motors I run alot I would rather buy ethanol free gas and mix with a good oil like Stihl ultra, but for the majority of my tools now I just run this fuel because of it's consistency and stability. Smell not too bad either, better than a dino oil based mix.

It's a lot cheaper than carb work

HD carries it for about the same, but I order in on amazon to save the time
3760969
I put this in every car I own to keep it running well. This is a concentrated version of the additive Chevron puts in their gas. Highly recommended for keeping your engine running cleanly.
2015822
No, No, No! I was kidding. HOWEVER! this is an outstanding Anti-Seize compound.

Works especially well on anything exhaust system or any other extreme high heat area stuff you have to deal with.

Stop using that aluminum/graphite powder based junk.

This is the real thing.

BELIEVE IT!
2133678
This product fouled one of my fuel injectors. I have a 2002 Toyota Tacoma. It runs like a champ, and I've used Techron at every oil change, and Techron has always smoothed things out.  Well, I decided to try something different at my last oil change. I should have just stuck with Techron, but I put BG 44K in it instead. Within 60 miles of adding BG 44K to the tank, my truck started bucking and the check engine light came on with a Code P0171 (lean fuel) and a Code P0304 (misfire cylinder #4). Long story short, I learned that BG 44K contained strong solvents, and it loosened up junk in big pieces which then fouled the fuel injector is cylinder #4. Not cool!  If you're debating between Techron and BG 44K. Go with Techron. Better safe than sorry. Techron cleans more gently, and it does a nice job lubricating things up. My truck always ran smooth as butter after Techron. My truck never misfired once in its life until I tried BG 44K.  Also, I've read the strong solvents in BG 44K can ruin plastic and rubber parts in the fuel system. There are better products out there than this stuff.  And as always, if it ain't broke, don't fix it.
695012
I have religiously used this in gas for my mowers and small power equipment and have had zero fuel issues.  Maybe its just luck, but based on how much I read about fuel issues, I doubt it.
3431394
This stuff seems to have worked great! I ran it through my 1996 Ford F-250 after sea foaming the upper engine and it is running great! If you are looking to clean, get this concentrate, not the stuff "with techron". I bought the single bottle to try it out, and believe I will get it by the case and use in all of  my vehicles.
4781672
My mechanic suggested using a fuel system additive in my car occasionally to help keep the injectors clean. I read everything I could on the subject and decided to find the product with the highest percentage of Polyetheramine (PEA), as stated on the MSDS, for the lowest cost per ounce. I also heeded the advice of a couple of prominent car enthusiasts who recommend using the product as directed (one bottle per tank) rather than dumping the whole bottle in near Empty in an attempt to increase the concentration of additives. To be honest, after just one tank I haven't noticed any difference in performance, but it's really too soon to tell. I have been plotting MPG since day one and will update this review if I see any significant change, or if Red Line SI-1 seems to help the slight hesitation that has developed over the last couple of years.
552021
I used it in my 2003 ExcursionI! My SUV runs beautifully! My son Matt got me started! I have more than 165000 miles! I highly recommend  X REV ultimate high performance Diesel fuel additive!
4161759
As many others on here, I own a 6.0 Powerstroke  with a tendency to act up. Combining this additive with Rotella t6, I've gained a smoother idle, easier cold starts and reduced stiction. Further more, it seems to have completely cured a number of tiny leaks I was developing around the back of the block.

Without any empirical information regarding the changes, this appears to be a damn near miracle product, and I'll continue to use it with every oil change in place of more expensive "traditional" additives.
4459658
IF ONLY THERE WERE A PEOPLE RESTORER! I would not be permanently convalescing and writing reviews about oil treatments, movies, classical music and good books.

Question: Why are otherwise-intelligent people interested in getting inside their car's engine and somehow affecting it?

Answer: I have no idea.

NEVERTHELESS:

Without a doubt, this is a super hi-performance oil additive! According to their website and from my experience using "Restore" over the past 3 years, I can tell you that the only difference between this 8 cylinder product and the 6 and 4 cylinder products is the amount of fluid product you get. This 8 cylinder product is 19 oz., the 6 cyl. product is 15 oz. and the 4 cyl. product is 11 oz., to approximate the differences in engine displacement.

WHAT THE PRODUCT CLAIMS:

Regardless of the size of the can, this product claims to be the only product that contains "RESTORE'S" proprietary CSL formula. They claim that "CSL" possesses unique properties that will "fill in" and "seal micro-leaks" in the "cylinder wall" of your engine and mine. They claim the effect of sealing these "micro-leaks" is the elimination of "blow-by", higher engine compression, and more apparent horsepower that we can feel through increased acceleration. Also, on smaller 4-cylinder engines this "restoration of the cylinder walls" is supposed to restore a "balanced compression state" and result in smoother idling. Not having a 4 cylinder engine I can not say for sure, but it seems to have made our car's 6-cylinder engine idle more smoothly.

WHAT I HAVE NOTICED AFTER 3 YEARS OF INTENSIVE USE:

After years of using oil additives which increase viscosity and the risk of blowing oil seals in the engine [I've done that.], I tried this product. It does not increase viscosity, but it does increase the gas mileage [10-12%] and the performance of my 1998 V6 Plymouth Voyager which now has almost 140,000 miles on it. Also, it quieted the noisy lifters and made the engine much easier to turn over on very cold mornings. The engine idles and accelerates smoothly, but we never had a complaint in those areas.

During the summers, I do use a viscosity-increasing additive ["NO SMOKE"] which I find to be better at reducing the engine's tendency to burn a little oil [quart every 2,000 miles], especially at high speeds for sustained periods. Having used this product for several years I do feel comfortable using "Restore" in colder weather, but not when it's too warm as I have noticed a greater tendency to use oil during the summer with it and the faint smell of exhaust fumes if our back van windows are open when we first start the engine after we change from using "NO SMOKE to "RESTORE". On the plus side, I have also noticed that the benefit of using this treatment lasts at least several months after running the car without it and I gauge this by the decline in gas mileage that typically does not occur for at least 4,000 miles of driving without it.

INTERESTING NOTE:

This summer we began using 20W/50 grade oil instead of the usual 10W/30 and the tendency to use oil has decreased quite a bit.

Having said that, "Restore" increases gas mileage and is better in cold weather in every way. Now that Old Man Winter is nearly here again, I'll be repurchasing the little silver can very soon. Brrr!

FOR MORE INFO:
For more info check "restoreusa" on the world wide web. Their "Frequently Asked Questions" webpage is a quick useful guide to learning about this product as they see it.

[I have NO affiliation with any product or company.]
1186739
MY EXPERIENCE: OK lets start off with the toxicity claims. First of all, I do believe this product to be toxic. For one thing, I don't like the smell of it! Secondly, without a doubt, if you sniff too much of this stuff, your going to get light headed, or at least feel like your mellow yellow on liquid wrench, macromaying your head into the car bumper. The thing I don't like about this stuff, is that it does not come with a straw. Oh sure it claims to have pin point accuracy, but that is a joke. If you want to focus the blast right where you need it, you need a straw, and they don't even provide that for you!

As far as its claims to be magnetic, surprisingly it is! I don't know what is in this stuff, but you could put a metal object on a up-hill, and spray PB just bellow it. And the PB will slowly climb up to it like a worm going after its food. This works really well, cause I can spray this stuff into small crevices on an engine, or door hinges for example, and the product just works itself up in there.

As far as a lubricant, it works really well. It does actually do what it claims, you spray it on, it stays there, works great. Now, as far as penetrating ability is concerned, this stuff is amazing. I really like Marvel Mystery Oil as a penetrator, but I have to admit, this PB is good stuff, works great. They sure have a lot of fancy wording on the can, obviously its all meant to attract attention to the product on the shelves, as its always the one that stands out from all the others.

CONCLUSION: As a lubricator, it keeps parts moving smoothly. As a penetrator, it freeze up rusted parts. As a magnetic attractor, allows the product to get deep into crevices to better lubricate and penetrate whatever you have the product on. However, this stuff is without a doubt, a toxic product, especially if they give a warning to woman to not use the product if they have a baby one the way. I think the product works excellent, just wish they provided me with a straw!

And another thing, why are chemicals that are capable of providing reproductive harm, always known to the state of California? You know, we got 49 other states, you would think at least one of them would know about it. But oh no, only California, where Arnold Schwarzenegger has his army of cybernetic robots putting out wild fires and serving EPA regulations.
4120584
Outside of being scary hazardous to use, this stuff is amazing.  Comparing this to Rustoleum clear coat ain't in the same ball park, hell, it ain't even the same damn sport.  Used this to clear coat gas tank on my motorcycle restoration project and it goes on absolutely fantastic!  Awesome wide spray pattern that was easy to control and get correct, full and even coverage on the minimum of passes.  Dries great, wet-sanded and polished out so it looks better than what comes out of the factory (if you are willing to commit the effort to it).

The stuff scares me because of its isocyanate makeup (I image inhaling this stuff would be like inhaling atomized super glue, but I'm no chemist so what the hell do I know).  Because of this, I only used it where I had to (gas tank).  But it is its non-solvent based composition that makes it resistant to gasoline damage. If I had it to do all over again I would purchase a full MOPP suit and clear coat EVERYTHING with this, it is that good.  I have not tested its durability against a gas spill yet (bike isn't quite finished), but I'm confident it will hold up.  Can't recommend highly enough, just be sure to use all the protective gear as recommended (and don't be too close to your car when using it on a breezy day.  Yeah, woops).
1713635
I use this each year for my motorcycle and lawn tractor and lawn mower fuel tanks to eliminate stale fuel problems in the spring when all are started up again for regular use, the price was right and it was delivered quickly too, packaged well etc.

It's good stuff for cleaning fuel systems even on regular use applications and often one might notice their mower or motorcycle or even automobile running better after adding it to the fuel and driving it a few miles..

I highly recommend this product, have used it for years and swear by it.
4904727
This stuff is unfreakingbelievable! I've used everything from Hetman's, to Bach, to Al Cass, to even several homemade valve oils, just about everything, but this stuff right here!

It's BEST.

I like it the best for the large valves on my tuba (including the 5th rotor) and the rotor on my trombone. They are even faster than with BlueJuice or even Al Cass fast. It also lasts longer than anything else I've ever used. I wanted to see how long it would last, so I cleaned and applied this oil. Doing this I noticed there was almost no smell (especially when compared to the blue stuff, to me anyway). Well unfortunately I'm unable to report it's exact staying power because through practicing for an hour or two daily and weekly rehearsals...I forgot when I oiled them last...oops. Needless to say, I re-applied and this will be my only valve oil from now on.