The 12 Best Engine Doctor Oil Additives (2022 reviews)

The Tufoil Engine Doctor Oil Additive's superior materials makes sure that it ages well with use. The tufoil engine doctor oil additive is used for oil leaks and it is silky smooth. Tufoil engine treatment will keep your car, truck, motorcycle or boat running so efficiently you can literally double the life of your engine. In addition, it is ideal for peace of mind, is good for small engines and it is good for good petrol.

The additive works great, changes the oil and it quiets the engine. Moreover, the additive has miles per gallon, is made for quick delivery and it is great for all gas. Most importantly, the tufoil engine doctor oil additive is great for oil burning and it is for wet clutches.

Most buyers quickly discovered that the additive is a logical that it could compensate for the sludge that it's suspended in. Also, a few also found that the additive was great in the 80s, will be tested again soon and updating. Also, they strongly agree that the additive is a great additive to increase hp and mph. Overall, for most buyers, Tufoil product was just what they wanted.

Customers say that getting a synthetic oil additive, along with additive is useful.

Top Customer Quotes:

This includes the study and application of the principles of friction, lubrication, and wear.
The stand - out additive for fuel saving and reduction of friction.
This definitely keeps the engine cool.
This is by far one of the best in living up to that claim.

Best For Fuel Economy: Hot Shots Secret Engine Doctor Oil Additive

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The Hot Shots Secret Engine Doctor Oil Additive's material feels more premium than its price would suggest. The hot shots secret engine doctor oil additive comes with preexisting damage caused by friction, fr3 friction reducer smooths engine surfaces to provide an optimal surface for the host oil. Friction makes your engine work harder, causing a decrease in gas mileage and increased emissions. The synergy of these components extends the base oil performance in shear stability, oxidation stability, film strength & especially friction reduction.

Most importantly, the hot shots secret engine doctor oil additive works great and it has increased throttle performance.

Most buyers agree that the additive is suitable for use in both gas and diesel engines. In addition, they say that the additives make incredible differences in the sound. Moreover, they also found that the additive is going in every oil change from now on. In conclusion, for almost all customers, it was what they were looking for.

Customers discovered that getting a engine doctor oil additive, along with additive is useful.

Top Customer Quotes:

This allows for better oil pressure and it has reduced engine noise.
Mix fr3 with fuel after adding it to your engine's oil.
This is a friction reducer. They claim it works in all types of applications.
This runs quieter and it is for gasoline engines.

Best For Lifter Tick: Lucas Oil Engine Doctor Oil Additive

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Compared with other additives in this category, the Lucas Oil Engine Doctor Oil Additive has a convenient design. The lucas oil engine doctor oil additive is pure petroleum, it can safely blend with all other automotive lubricants, even synthetics, atf, and mineral oil. Use luca oil stabilizer in gear oil to stop leaks, reduce operating temperatures and increase the life of the gear oil. Further, this feels new and it is contrary to some belief.s.

Finally, the lucas oil engine doctor oil additive has added one bottle and it has quiet the engine.

Most buyers found that the additive has had no other issues ever since. Furthermore, a few also found that the additive is super thick and will take 40 minutes to drain from the bottle. And, they strongly agree that the additive is a lot cheaper to buy from amazon.

Customers discovered that getting a supertech oil stabilizer and diesel cold start additive, with this additive made their life much easier.

Top Customer Quotes:

This is good for engines with a lot of miles.
This can be used on both ford and chevy engines with good results.
This works well, has miles per gallon and it works very well.
For use in any engine, gasoline or diesel.

Best For Lifter Noise: Liqui Moly Engine Doctor Oil Additive

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Liqui Moly offers a variety of additives for personal choice and yet maintains quality in all the variants. The Liqui Moly Engine Doctor Oil Additive is compatible with all commercially available engine oils. The manufacturer says: Our problem-solvers lengthen the service life of motors and aggregates and ensure their excellent performance and proper function for many years to come. Moreover, it is made with great stuff and it smooths out vibrations.

Above all, the liqui moly engine doctor oil additive is made from raw material deliveries, to production, right through to shipment.

Most customers found that the additive does indeed clean and flush the engine well. Further, they also found that the additive cleans up sludge well, Additionally it is German like the car. In conclusion, for most buyers, it was what they were looking for.

Few customers bought engine oil additives to reduce noise and xtreme clean engine flush, along with the additive.

Top Customer Quotes:

This is good for high milage vehicles.
This is some really good stuff.
This cleaned maf sensor, works great and it changes the oil.
This has been used in high mileage BMW'S Mercedes etc.

Best For Gas Mileage: Lubegard Engine Doctor Oil Additive

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Next on the list, we've got yet another additive that manages to win our hearts. It's the Lubegard Engine Doctor Oil Additive and it's widely considered as one of the most convenient additives you can buy. The lubegard engine doctor oil additive is an award-winning technology that has gained the use and approval of multiple major car manufacturers and has been the written solution for transmission problems in eight car manufacturers ' technical bulletins. In order to find out if your vehicle came equipped with mercon v fluid, lubegard has the industry's most comprehensive listing of all makes and models, with factory fill and also the appropriate lubegard conversion product if an alternative is needed to dealer-only fluids. Further, this can perform like highly friction - modified atfs such as.

The additive protects and restores seals for optimum performance, conditions and restores seals and o-rings. Above all, the lubegard engine doctoroil additive reduces friction and wear on metal parts and internal components.

Almost all customers quickly discovered that the additive would work quite well, plus it is "a very nice problem to have. In addition, a few strongly agree that the additive comes with an automatic that uses isuzu branded oil. Furthermore, a few also found that the additive can feel xtra torque on each clutch apply. So, customers were very happy to recommend it to friends and would-be buyers.

Customers found that buying a _atf_ gearbox oil, along with additive is useful.

Top Customer Quotes:

This is made for Honda power steering.
This will, but, you may have to repeat it a year later.
This does what it says and it is much more crisp.
This provides long - term protection of the fluid and transmission itself from heat and wear.

Best With Old Engines: Dura Lube Engine Doctor Oil Additive

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The Dura Lube line of additives comes in a pretty wide variety of styles, so you can definitely find one that suits your individual preferences and needs. The Dura Lube Engine Doctor Oil Additive comes with great stuff, is compatible with synthetics and it does what it says. For every 5 quarts of motor oil used, substitute 1 quart of oil with 1 qt of dura lube engine treatment in the crankcase. Further, it has added one bottle, changed the oil and it contains no solids.

Lastly, the dura lube engine doctor oil additive will reduce friction between mechanical parts, maximizing protection and performance, while reducing noise, providing quieter and smoother operation.

Most buyers found that the additive is where pistons melt into cylinder walls. Furthermore, a few also found that the additive is par for the coarse, on washer motors, dryers, dish washers. To sum up, at the price, they believe that they got a steal of a deal with it.

Top Customer Quotes:

This is great for cold starts etc.
This has 265000 miles and no engine problems.
This does not burn oil, fires up on the first try.
The manufacturer says: we don’t just treat the oil, we treat the engine.

Best For More Power: Tribotex Engine Doctor Oil Additive

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Tribotex makes beautiful and great additives with classic and smartly chosen materials. The Tribotex Engine Doctor Oil Additive is a revolutionary breakthrough in engine coating technology. Before treatment, this typical piston ring (see photo), a major component to the correct function of an engine, is scratched and damaged (see arrow) from 120, 000 miles of highway driving. And, the additive definitely has better acceleration, changed the oil and it has bearing wear.

The additive runs quieter and it is made for the bottom line. Also, the additive is great for oil leaks and it has miles per gallon. Most importantly, the tribotex enginedoctor oiladditive is a more powerful dose for bigger engines.

Almost all customers found that the additive is designed to be helpful in older cars as they have more wear, tho they will not hurt a newer engine. Further, they strongly agree that the additive is running smooth and has been running smooth for the past 6 month.sssss. Moreover, a few also found that the machine uses the additive for 40, 000 miles.

Customers say that buying a engine oil additives to reduce noise, along with additive is useful.

Top Customer Quotes:

This definitely shows its age with how it performed.
This is not as apparent as in older engines, so the difference is less perceived.
This is good for automatic and CVT transmissions also.
This is also non-toxic, safe, and made by scientists in the USA.

Best For Non Roller Rocker Arms: Zddplus Engine Doctor Oil Additive

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Compared with other additives in this category, the Zddplus Engine Doctor Oil Additive has a convenient design. The zddplus engine doctor oil additive is compatible with conventional motor oil and it is good for vintage cars. Make sure this fits by entering your model number. In addition, the additive is easy to use and it is compatible with synthetic.

Lastly, the zddplus engine doctor oil additive works great and it is perfect for classic cars.

Almost all customers opine that the additive is used to buy more expensive valvoline vr1 motor oil in order to get the zinc additive that these older engines need. Further, they strongly agree that the additives are important for older cars. Moreover, they say that the additive can be used in marine, motorcycle and tractor engines.

Customers say that getting a anti wear additives in engine oil, along with additive is useful.

Top Customer Quotes:

This is great with fast shipping and it changed the oil.
This is what is termed a flat tappet valve train and yeah it needs zddp.
This will certainly perform better than today’s oil.
This is great for non roller rocker arms.

Best For New Engine: Resurs Engine Doctor Oil Additive

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Next on the list, we've got yet another additive that manages to win our hearts. It's the Resurs Engine Doctor Oil Additive and it's widely considered as one of the most convenient additives you can buy. The resurs engine doctor oil additive restores worn parts to their factory characteristics by up to 70. 1 bottle of 50g for 2-3 liters of oil is recommended to use 1-3% of resources to protect and restore your engine. In addition, this is perfect for oil burning and it calms the engine.

Most importantly, the resurs engine doctoroil additive is compatible with all types of oil.

Almost all customers agree that the additive is used for gasoline/diesel/lpg powered vehicles and with any type of engine oil. Further, a few say that the additive is used for cars with both automatic and manual transmission.s.

Customers also discovered that its helpful to get a engine oil additives to reduce noise and engine additives for oil consumption, along with this additive.

Why We Like This:

Best selling product 2017, decreases fuel consumption by up to 7%,.
As the #1 best selling product in 2017, decreases fuel consumption by up to 7.
Up to 5 times less oil burning in the engine.
Increases engine compression up to 40%.

Best For Synthetic Motor Oils: Energy Release Engine Doctor Oil Additive

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The best part: Energy Release Engine Doctor Oil Additive costs comparatively low and it is available to ship in 24 hours. The energy release enginedoctor oiladditive works great, does what it says and it is made for synthetic motor oils. Energy releases antifriction engine treatment conditions and protects the metal of your vehicle or machinery. Moreover, it is activated by heat and friction to protect against wear created by the moving parts in an engine. Finally, the energy release engine doctor oil additive comes with great stuff and it allows for subsequent applications.

One customer says - "You should try it, it 's real, but now you ca find it being sold in calif, Go figure they ruin everything that's good. ". Almost all buyers quickly discovered that the additive would not repair a flaw in the engine.

Few customers got engine metal treatment, along with the additive.

Why We Like This:

Use energy release in snowmobiles, motorcycles, atvs, watercraft and lawn and garden equipment.
Decreases heat and friction between moving parts.
New and hot releases.

Best For Hot Rods: Zmax Engine Doctor Oil Additive

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The Zmax line of additives comes in a pretty wide variety of styles, so you can definitely find one that suits your individual preferences and needs. The Zmax Engine Doctor Oil Additive is proud to be the official micro-lubricant of speedway motorsports. Make sure this fits by entering your model number. This cost - saving product lowers emissions, is eco - friendly and usa.

The additive is perfect for hot rods, is great for fuel additives and it is good for good oil. Finally, the zmax engine doctor oil additive improves fuel efficiency for gas or diesel vehicles.

One customer says - "You have no lubrication until you have oil pressure providing oil to the upper engine. ". Most customers opine that the additive is a polymer that shares an electrical bond with the metal. In short, for most buyers, the additive was what they were looking for.

Customers also discovered that its wise to get a engine doctor oil additive, along with this additive.

Why We Like This:

Make zmax part of your car or truck’s routine maintenance.
This is easy to use and it is perfect for small engines.
This definitely has better acceleration and it is great for fuel system conditioners.
Stock zmax in your garage to regularly treat your car like a professional.

Best For Diesel Engine: Xado Engine Doctor Oil Additive

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Xado is known for creating pragmatic and minimalist additives for people on the go, and its line of Xado Engine Doctor Oil Additives definitely falls in line with that reputation. The xado engine doctor oil additive has increased engine power and it works great. For the highest level of protection for your vehicle’s engine, use xado atomic oil in the future. The product reduces friction, rebuilds worn metal in engine parts and creates protective coating against future wear, thus providing tools - free restoration and anti - wear protection.

The additive is not recommended to change oil during this period. Further, the additive has reduced noise and it changed the oil. Finally, the xado engine doctor oil additive is compatible with all types of motor oils.

"Make sure you follow the instructions. " - says, one customer. With no doubts, this product passed the test and had very satisfied buyers eager to share their experience.

Why We Like This:

Great product for diesel engines of heavy-duty vehicles!! !.
Reduce fuel consumption. Enhance engine service life.
Lasts for 60, 000 miles.
Increase pressure in the oil system up to the nominal level. Reduce noise and vibration.