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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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Star Tron Enzyme Fuel Treatment - Concentrated Gas Formula 32 oz - Treats 512 Gallons
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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STA-BIL 22207 Fuel Stabilizer - 16 oz.
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."
"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."
"Every one should have a back-up plan and that should include fuel."
"Used this to stabilize my motorcycle over the winter."
"Something else I learned is to immediately put the correct amount into my gas cans as soon as I empty them, that way I don't have to try and remember to put it in when I get back from the gas station."
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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 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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