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Best Fuel System Additives

BG 44K Fuel System Cleaner
Because it provides efficient removal of upper engine deposits, this product reduces problems caused by deposit build-up such as engine surge, stalling, stumble, hesitation and power loss. Fuel system cleaner quickly cleans fuel injectors, valves and combustion chambers.
Reviews
"Adding 1/2 of the cleaner at two gallons and the rest at 8 gallons to make sure it mixed well with the fuel (I did get the chevron high grade fuel with Techron). I kept my RPM's high (3-4K) to burn out any carbon, etc and ran until empty."
"Litterally saved me from replacing them in a car I owned many years back."
"BG makes the best automotive additives in the business some think that BG is only necessary if you have a problem."
"The best for keeping your fuel system clean."
"Wow!"
"Been using all BG products in my gas vehicles for years and I use this in the gas tank every oil change."
"Added to full tank of fuel and vehicle performance has improved noticeably since then."
"My fuel injectors were clogged to the point that I couldn't redline."
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STA-BIL 22214 Fuel Stabilizer - 32 Fl oz.
Size: 32 Fl. Keeps fuel fresh for up to 12 months during storage.
Reviews
"Nest spring, When you turn the key or pull the rope, the mower will start without a whimper. If you do not do the above I will guarantee that come spring, you will be calling the lawn mower repair service. This goes for tillers, generators, weed eaters and everything that runs on gasoline or diesel fuel. When I decided to donate the truck to charity, I put a new battery in it and it fired right up."
"This fuel stabilizer is a must have for anyone who has leftover gas at the end of the summer and doesn't plan on using anymore until spring."
"I put this in the fuel tank of a car that I love that had a blown head gasket and needed a rebuild."
"What it does: This product stabilizes gasoline for up to six months of storage, either in your gas tank or in a gas can. It works just as well in the gas tank of your machine or vehicle as in the gas can in the garden shed or workshop. Note that this does not make gasoline last forever - so you still need to run your engines regularly and use up the gasoline in your gas cans and gas tanks with some frequency."
"This is an excellent product."
"I drive the car around a few miles to ensure the fuel stabilizer has an opportunity to cycle completely through the engine and fuel system."
"Used this to stabilize my motorcycle over the winter."
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Star Tron Enzyme Fuel Treatment - Concentrated Gas Formula 32 oz - Treats 512 Gallons
(Practical-Sailor August 2013) Star Tron increases fuel economy by cleaning the entire fuel delivery system, removing performance robbing gum and varnish deposits while modifying how fuel burns. Star Tron will stabilize fuel for up to two years, preventing the formation of gums and other solids that clog fuel injectors. Cleans valves and injectors of carbon deposits, gums and varnish for maximum performance, increased fuel efficiency and reduced emissions.
Reviews
"This is a tough product to rate, but I believe water is a issue in poor quality gasoline."
"Excellent product."
"Don't really know if this is doing anything...currently using my my SUV, minivan, mower, tractor, blower, golf cart...hoping it works as advertised."
"it does the work great, we used it in three motorcycles and two snowblowers and they started at the first time after 3-4 months stored."
"I use this for every carburetor engine that I have."
"For whatever reason my John Deere garden tractor will not run smoothly unless I add this to my fuel."
"I cannot say for certain this stuff works at cleaning out of my injectors and fuel system, as well as stabilizing my fuel."
"The product might be great but the delivery mechanism sucks!"
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Best Diesel Additives

Archoil Performance Kit P-1 for All Vehicles - 16oz AR9100 Friction Modifier + 16oz AR6200 Fuel Treatment
AR9100 also cleans the crankcase and extends oil life.AR6200 Fuel Treatment is a highly concentrated fuel treatment which Is added to every tank of fuel to boost performance, ensure fuel quality and protect your fuel system from wear, performance robbing deposits and other issues... POWERSTROKE APPLICATION: POWERSTROKE APPLICATION AR9100 fixes injectors in Ford PowerStroke 6.0L and 7.3L trucks and other HEUI Injection vehicles (Navistar T444E and VT365) by cleaning and lubricating stuck spool valves. 16oz AR9100 Friction Modifier Treats 16 quart oil sump.
Reviews
"Did help my International 4700 DT466E to stop hunting at idle and stop smoking,,(325k miles) I added it to every tankful for two weeks...now after 1 month, truck still idleing good for the high mileage on it....product did prevent having all injectors replaced for $3k...still keeping check on truck thru winter months here in Phoenix,,and yes i do use Powerservice cetane boster at every oil service.."
"Fuel mileage improved 3mpg (hand calculated) ... lots of factors but that increase made me happy with my ole 7.3 PSD Excursion 4x4. I recently changed my oil and added the 9100 friction modifier ..."
"2nd review.....My 178k mile 7.3L Power-stroke has had the famous cackle that Ford calls "normal"......after watching the video from Power-stroke help I performed the High Pressure Oil Pump Reservoir flush by using a sucktion pump and removing 1 pint at a time, refill and repeat until 3.5 quarts have been replaced. I use the oil additive on all 4 stroke lawn gear and the fuel additive for all 2 stroke lawn gear and am very pleased with the performance of all lawn equipment."
"However, having put 200 miles on my Excursion 6.0 following the label instructions, I am actually getting 1.5 mpg better (hand calculated) and it starts up and cold (as cold as possible given the weather now) much quicker."
"After I put the Archoil oil additive in with my oil change I realized that my block heater went out and I did not have the convenience of being able to plug in. I can not comment on the fuel additive yet because I have to warm the truck up so I will find out this spring if my fuel mileage has increased as well."
"I saw and felt the biggest difference in my diesel, no more loud stiction knocking or puff of blue smoke when I start it up."
"It does start a bit easier I think but I will keep using it as a preventative measure as long as the oil analysis stay the same or better."
"This is pure magic for the 6.0L PowerStroke engines."
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Best Fuel Additives

Sea Foam SF16-12PK Auto Marine Motor Treatment , 192 fl. oz, 12 Pack
Safe and effective when added to gasoline and diesel fuel and oil crankcases - Just pour it in!. Cleans Timing Chain Tensioners and VVT Actuators, Quiet Noisy Lifters.
Reviews
"I use it routinely in my lawn equipment and in all three of our vehicles."
"I used one ounce per quart of oil and drove approximately 150 miles in order for the product to clean the engine."
"Truck (Ford Ranger) was idling uneasy."
"Super easy to use - just dump it in your fuel tank before you fill up."
"Very expensive, but it is one of the few engine additive products I seem to be able to tell a difference when using."
"The Sea Foam helped unstick the float in the carburetor of my snow blower, and that saved me a ton of hassle and money."
"Didn't notice a difference one way or another using this product but good piece of mind to clean fuel system."
"I have an older well maintained vehicle and decided to try this in conjunction with seafoam aerosol."
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Best Octane Boosters

Lucas Oil 10026-PK12 Octane Booster - 15 oz (Pack of 12)
Lucas Oil Octane Booster bottle has been tested and proven to deliver three times more boost than most other brands. Promotes clean fuel burn for fewer emissions.
Reviews
"I use this in my 69 camaro with a 540 big block.US lucky people in CA get to pay top dollar for junk gas with ethanol .got tired of having to put 2 gallons of vp 109 in each tank for 9 bucks a gallon.this product works and was able to bump timing back up."
"when you insert it into your gas door, the neck of bottle does not fit in there, the liquid inside does not flow."
"My 2016 Chevrolet Colorado 4 cylinder would spark knock (ping) very badly on 87 octane."
"The high altitude in Colorado and 91 octane sucks the life out of my Audi RS6 and because it's tuned, performance takes even more of a hit."
"Great product, the best octane booster by far."
"I use this on my Harley CVO Road King with engine modifications and it works like it should as well as eliminating pinging."
"Other than purple gas and nitro methane this is the best stuff you can use for street cars!"
"Premium gas solved the problem, but this product about half the price of the additional money to fill with premium."
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Best Cooling System Additives

BlueDevil Head Gasket Sealer - 32 ounce(38386)
BlueDevil Head Gasket Sealer will repair and seal leaks in blown head gaskets, warped or cracked heads, heater cores, and freeze plugs. Contains no solid or particulate matter that can harm a vehicles engine.
Reviews
"This is because there is combustion gas constantly leaking into the coolant system creating a vapor lock in the heater core. Because of the high mileage I didn't want the expense of doing a head job, so decided to give Blue Devil a try. After 3 days driving I drained the coolant down, keeping the liquid, put the thermostats back in, then added enough anti-freeze for a 50/50 mix. Engine runs great, there are no misfires, no loss of coolant, no excess pressure and there is ample heat from the heater core with the car at idle. This is supposed to be a permanent repair so real proof will be how it holds up over time, including the upcoming winter. Prior to the Blue Devil repair, air/combustion gas would be trapped in the heater core meaning no heat inside the car unless RPM's were very high. I would not hesitate to use it again in the appropriate circumstance, which would for me be a high mileage vehicle, exhibiting symptoms of head gasket failure, having a cooling system that is in good condition. Fully drain, clean and flush the cooling system first, then use the Blue Devil per instructions, additionally driving the vehicle over a few days and a couple hundred miles before draining and adding the anti-freeze back in the system (must be done in non-freezing temps of course!)."
"I took the thermostat out. Flush it with the garden hose. Refill with water leaving room for the 1.5 quarts. Pour SLOWLY the sealer. Let it Idle for an hour. Turned the engine off and let it cooled down overnight. next morning I put the thermostat back. Refilled with coolant. NO MORE ISSUES. I would totally recommend, it's been about 5K miles and no problems."
"My mechanic diagnosed the head gasket as the issue, with coolant leaking into the cylinder and fouling the spark plugs causing a misfire. I drove for about 4 weeks without a misfire until it came back today after about 500 miles...also note that I only would drive this car locally for about 15-20 minute trips max, so I can't say whether this would work for a long highway trip."
"I flushed the coolant by opening the radiator drain cock while the engine was running and refilling the reservoir simultaneously with the garden hose until the drainage ran clear. I didn't want to add it to a full reservoir because very little of it would circulate with the motor running. The good news is that the reservoir tee's into the lower radiator hose which feeds the motor with cooled liquid. I drained the radiator and reservoir (2ish gallons) and added 1.5 bottles of Blue Devil to the empty reservoir which drained it directly into the main circulation."
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Best Hydraulic Fluid Additives

Fluid Film 5gal Pail NAS Rust Inhibitor Rust Prevention Anti Corrosion Anti Rust Coating Undercoating Underbody Rust Proofing Corrosion Protection for Truck Snow Blower Mower Car Semi Tractor Bus
Fluid Film is a rust and corrosion preventative, penetrant, and lubricant. It is a non-toxic, long lasting, thixotropic liquid that has been used for over fifty years in the highly corrosive marine environment of ships and offshore drilling rigs. Fluid Film is formulated from specially processed wool-wax, highly refined petroleum oils and selected agents to provide corrosion control, penetration, metal wetting and water displacement. The long lasting product contains no solvents, will not dry out and will penetrate to the base of all metals, providing corrosion protection from both natural and industrial atmospheres.
Reviews
"NAS is the consistency for car undercoating."
"This is great stuff, if you have corrosion or just want to lube a moving part, trust this product, discovered it just a few years ago and now won't be without it."
"Great stuff."
"easy to use cleaned up well just have to wait and see about the rust."
"good stuff at a good price."
"I have been using this product for almost two years and it has been a great under coating for vehicles, plows and work equipment up here Maine...where they love to salt roads enough to actually make them white at times."
"The fluid film was delivered promptly and show last me quite a while."
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Best Power Steering Fluid Additives

Lucas 10008 Power Steering Stop Leak - 12 oz
Lucas, 12oz, power steering stop Leak, removes hard spots & stops most leaks or your money back!
Reviews
"Love this stuff."
"This really by far has fixed my issue with steering problems that I have been having in the past with putting in fluid and have to keep refilling it and now after filling up my power steering fluid with this I been having no issues now for weeks."
"I used this product to stop a leak on the power steering rack on my Mazda MIata. Well, I really didn't want to spend that kind of money, so I figured for around $8.00 I would give Lucas Oil a try."
"Helped slow it down and it's color let me know it was a power steering leak."
"Put 8 oz in the trans, behaving better, less slipping and buzzing/whine( i may just buy the 24 oz trans fix and drain a quart off after all, and see how that goes.)."
"Fixed a small leak in round the rack of my car."
"Good stuff really helps with leaks."
"Used it on my Honda Pilot and seems to help!"
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Best Engine & Oil Fluid Additives

REV X Stiction Fix Oil Treatment - Two 4 fl. oz. Bottles
Where they start to experience static friction and fail to operate in proper time, this has become known as a "Stiction" issue for these engines. Stiction Issue in HEUI Injectors & Turbo Chargers Can be Repaired.
Reviews
"I have a 04 Ford F-250 diesel 6.0, recently the truck during 3/4 throttle pull popped the top of the oil filter cap. We never figured out what caused the issue, but we did do a full oil change and replaced filter and cap with motorcraft products. I’m sure glad I did because what I thought was going to be an injector replacement job ended up just being a stiction issue and now all my issues are gone."
"Truck sounded rough on cold start and would buck until oil got hot, but there were not codes. Truck now idles SMOOTH -- enough of a difference for a couple of my friends to comment on how much better it runs."
"I purchase this to cut down on the stiction issues during these colder months, but this also eliminated the constant black cloud."
"I know my injectors need to be replaced but even at $65 extra per oil change that's a lot cheaper than replacing the injectors."
"Keeps system running smooth in cold weather, and eliminates any striction problems."
"After some research I was hearing it was most likely stiction in the injectors, and that I should try REV X. While the price made me cringe, the price of new injectors made me take the gamble."
"I was experiencing some stiction issues with my diesel truck's injectors and after adding two bottles of REV-X following my last oil change, it has noticeably smoother idle and sound."
"This product really works."
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Best Transmission Fluid Additives

Honda Genuine 08200-9008 Automatic Transmission Fluid ATF DW-1, 4 Quarts
Honda Genuine 08200-9008 Automatic Transmission Fluid ATF DW-1, 4 Quarts. Enter your model number to make sure this fits.
Reviews
"It's been the only thing I use so far."
"Replaced transmission fluid on a 2009 Civic that had hesitations during shifts (135k miles)."
"My transmission started to grind and slip."
"Oem oil so what can one say, I bought because of the price and free Prime shipping, how can one beat that, delivered to your door."
"Face it: Honda Auto Transmission fluid is expensive."
"Works well."
"Only use Honda ATF in your Honda!!"
"Really smoothed out the shifts on a bit older Acura."
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