There are several advantages of having a oil additive for old engine. We are here to help you choose the right one for your purposes from all the best available products in market today.

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Our Top Picks:

Best Overall: Buy: Lucas Oil Oil Additive For Old Engine READ REVIEW

Best For Fuel Economy: Buy: Prolong Super Lubricants Oil Additive For Old Engine READ REVIEW

Best For Zddp Additive: Buy: Hyper Lube By Rislone Oil Additive For Old Engine READ REVIEW

Best For Use: Buy: Bestline Superior Lubricants Oil Additive For Old Engine READ REVIEW

Best For Hot Rods: Buy: Rev X Oil Additive For Old Engine READ REVIEW

Best For Older Engines: Buy: Liqui Moly Oil Additive For Old Engine READ REVIEW

Best For More Power: Buy: Restore Oil Additive For Old Engine READ REVIEW

Best For Fuel System Cleaner: Buy: Xado Oil Additive For Old Engine READ REVIEW

Best For Manual Transmissions: Buy: Tribotex Oil Additive For Old Engine READ REVIEW

Best For Small Engines: Buy: Bars Leaks Oil Additive For Old Engine READ REVIEW

Best For Non Roller Rocker Arms: Buy: Zddplus Oil Additive For Old Engine READ REVIEW

Best Overall: Lucas Oil Oil Additive For Old Engine

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Compared with other additives in this category, the Lucas Oil Oil Additive For Old Engines has a design with broader appeal. The lucas oil oil additive for old engine allows motor oils a higher degree of lubricity which reduces oil consumption and operating temperatures. Make sure this fits by entering your model number. And, it slows the burn, has miles per gallon and it is for day - use vehicles.

Above all, the lucas oil oil additive for old engines changed the oil and it is common.

Most customers agree that the additive is good for preventative maintenance in older vehicles. And, they strongly agree that the additive can be used on both ford and clean engines with good results. And, they strongly agree that the additive has had no other problems ever since. Overall, buyers found this to be one of the best additives for daily purposes.

• This is priced 3 to $5 lower than at an auto parts store.
• You can also check directly by Lucas oil for their comment/response.
• This is a very good buy and shipping is great.
• This is good for engines with a lot of miles.

Best For Fuel Economy: Prolong Super Lubricants Oil Additive For Old Engine

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The prolong super lubricant oil additive for old engine is suitable and reliable and fits well with your regular use. The prolong super lubricant oil additive for old engines is great for gas mileage and it has increased power. Prolong engine treatment does not contain solid particles such as PTFE resins, 'molys', zinc, copper or graphite. And, the additive is incredible, it runs great and it reduces wear.

The additive changed the fluid and it has miles per gallon. Above all, the prolonged super lubricants oil additive for old engines is recommended that engine treatment be used at each oil change, every six months or 6, 000 miles.

Almost all customers agree that the additive will work in manual transmissions and differentials. In addition, they strongly agree that the additives make the difference in an old almost wormed out car.

• This is formulated with advanced technology.
• This is good for valve cover gaskets and it is great for high-mileage vehicles.
• This changed the oil and it changed the filter.
• This was advertised by (then) indy 500 legends on TV at the time.

Best For Zddp Additive: Hyper Lube By Rislone Oil Additive For Old Engine

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Next on the list, we've got yet another additive that manages to win our hearts. It's the Hyper Lube By Rislone Oil Additive For Old Engines and it's widely considered as one of the most convenient additives you can buy. The hyper lube by rislone oil additive for old engine has added one bottle and it is running great. The manufacturer says: With over 100 years of experience under our belt, you can trust that our revolutionary performance products will give your car a fighting chance at a long, healthy life. And, it is good for fuel economy, does what it says and it comes with part number.

The additive is made with great stuff, is industrial and it is made for good stuff. Moreover, it is worth the money, is great with a nice price and it is good for good quality. Above all, the hyper lube by rislone oil additive for old engines works great and it provides great value.

Most customers found that the additive is recommended to use at a 7% ratio for all 2006 and older diesel engines. Moreover, they strongly agree that the additive is a must add to the crankcase. And, they strongly agree that the additive cleans the inside of a motor like nothing else. In short, many customers have used the hyper lube by rislone oil additive for oldengine for more than a few months without any issues, and it shows no sign of giving up.

• This is superior to any conventional motor oil and additives that you can buy.
• This is essential for older engines with flat tappet cams.
• This is designed for an sg api service ratiing.
• This is a good price for zddp additive.

Best For Use: Bestline Superior Lubricants Oil Additive For Old Engine

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Bestline Superior Lubricants offers a variety of additives for personal choice and yet maintains quality in all the variants. The most superior lubricant oil additive for old engines feels more powerful and it is great for gas mileage. Take good care of your vehicle and it will take care of you. And, this reduces friction by approximately 60% compared to conventional engines, by forming an ultra-low friction film on top of the diamond nano-coating.

Above all, the most superior lubricant oil additive for oldengine is best for use for gas and it is ideal for extreme heat resistance.

Almost all buyers found that the additive will reduce wear and certainly help prevent scoring. Moreover, a few say that the additive is designed for vehicles like yours. Also, they strongly agree that the treatment rate for engine treatment has always been to use one bottle per 5 - quarts of regular oil. In short, for almost all buyers, Bestline Superior Lubricants product was the most suitable.

• This does not restore parts already in need of replacement.
• Extreme heat resistance and boundary layer protection.
• Use of gas and diesel engines.
• This will not change your viscosity, it is truly the best stuff on the market.

Best For Hot Rods: Rev X Oil Additive For Old Engine

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The Rev X Oil Additive For Old Engine's high-end materials makes sure that it ages well with use. The rev x oil additive for old engines is great in manual transmissions, gear boxes, rear ends and any other type of oil lube where zinc is the primary ingredient to prevent metal to metal wear. As zinc (zddp) is heated, it creates a film that coats the engine parts with an anti-wear layer, Think of it as a sacrificial layer that will wear away, preventing wear on your vital engine parts. With zinc, these areas will be treated with a sacrificial layer, preventing more wear than is needed to break the engine in.

The additive is an American company located in Grand Rapids, Mi, who produces and manufacturers all of it'ssssss products in the USA. And, it can be used in relation to engine oil for the ideal amount of protection. Most importantly, the rev x oil additive forold engines is very beneficial for flat tappet motors, which have, as the name suggests, a flat lifter.

Almost all customers opine that the additive will flatten the lobes over time, even after a break-in. Also, a few strongly agree that the additive be present in oil. And, a few say that the additive is for push rod engines to reduce wear. To sum up, buyers found this to be one of the best additives for daily purposes.

• This is compatible with synthetic, semi-synthetic, and standard mineral oils.
• This can be used in power steering as well.
• This is great with great stuff, works great and it has treats 6 quarts.
• Protects flat tappet camshafts (hydraulic or solid).

Best For Older Engines: Liqui Moly Oil Additive For Old Engine

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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 Oil Additive For Old Engines comes with over 4, 000 products relating to motor and transmission oils, fuel and oil additives, vehicle care, chemical repair aids as well as service products, adhesives and sealants, Liqui moly offers a globally unique range of absolute top quality. The Manufacturer says: In recent years, we have repeatedly received top marks in the readers’ polls of leading car magazines in Germany. Further, this provides for better gas mileage, has added one bottle and it is made worth the money.

Finally, the liqui moly oiladditive for old engines is built for fuel economy and it is good for gas mileage.

Most buyers agree that the additive can be used in any high - mileage engine. In addition, a few say that the additives are great for any IC engine. And, a few say that the additive makes them last longer, additionally will work OK no problem.

• This used to be a real p.i.t.a.
• This is good as it deleats the oil and its additives.
• It has a German logo on it.
• This was made in a former USSR satellite country.

Best For More Power: Restore Oil Additive For Old Engine

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The restored oil additivefor old engines is the most convenient additive on the market today. The restored oil additive for old engines is good for good oil, does what it says and it has compression loss. Restore engine restorer & lubricant is a high performance oil additive that increases compression in older high-mileage engines. Further, it improves combustion to increase horsepower, reduce oil burning, maximize fuel mileage and restore peak engine performance.

The additive is good for gas mileage and it runs great. Most importantly, the restored oil additive for old engines provides extreme pressure lubrication to help protect engine components from excessive wear.

Almost all customers found that the additive is noted on a daily daily basis running the exact same route and using multiple drivers. Further, they strongly agree that the additive is not 'rebuild in can'...others who have used it say it is. Moreover, a few also found that the only fix is to replace the head gasket, which is costly.

• This makes a huge difference, but what the heck.
• This does, however, improve compression and reduce oil usage.
• This has brought a car ready for the junk or parts yard, back to life.
• This is probably a bent valve, but it could be the piston rings were worn.

Best For Fuel System Cleaner: Xado Oil Additive For Old Engine

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Compared with other additives in this category, the Xado Oil Additive For Old Engines has a convenient design. The xado oil additive for old engines is used for fuel system cleaners and it has descriptions of products. For the highest level of protection for your vehicle’s engine, use xado atomic oil or atomic metal conditioner highway during each oil change 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 comes with a revitalizant | engine oil additive | suitable for gasoline and gasoline engines. Most importantly, the xado oiladditive for old engines works well for good quality and it is made for good stuff.

Almost all customers opine that the additive is burning a quart of oil every 1500 miles. Further, they strongly agree that the additive does what it says, but the effects are temporary. Overall, buyers found this to be one of the best additives for daily purposes.

• Lowers fuel consumption effectively | protects the engine against wear | atomic metal conditioner.
• This can be used in a ford and toyota engine.
• This can be used for all gasoline engines, including turbo and supercharged.
• This protects metal parts from overheating and overloading.

Best For Manual Transmissions: Tribotex Oil Additive For Old Engine

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Next on the list, we've got yet another additive that manages to win our hearts. It's the Tribotex Oil Additive For Old Engines and it's widely considered as one of the most convenient additives you can buy. The tribotex oil additive forold engines is worth the money and it is best for new cars. It is time to improve your engine and take your driving experience to a new level. In addition, this is more smooth and it is good for gas mileage.

Most importantly, the tribotex oil additive for old engines is smart and only forms on metal bearing surfaces.

Almost all customers agree that the additive is not as apparent as in older engines, so the difference is less perceived. And, a few say that the additive is meant to add a protective layer to combat friction. Moreover, they also found that the machine uses the additivefor 40, 000 miles.

• This is great for high - mileage vehicles.
• This reduces friction 10x better than engine oil alone.
• this work or whether you have some real problems.
• Always check your oil level and change it regularly.

Best For Small Engines: Bars Leaks Oil Additive For Old Engine

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We know from years of feedback from readers, amazon sellers, and family and friends what most people want in a convenient and appropriate additive. The Bars Leaks Oil Additive For Old Engine is exactly that - it's a simple additive that hits all the right notes. The bars leak oil. The additive for old engine is if the cylinder walls allow oil to leak up from the bottom of the engine, past the piston and into the combustion chamber. Before you know it, you're dealing with an oil - burning problem. And, this works in all gasoline and diesel engines, including turbocharged, eco boost, hybrid and even racing engines, including 3, 4, 5, 6, 8 and 10 cylinder engines in all cars, trucks, vans and suv's.

The additive can also be used in heavy-duty applications as well as tractors, boats, rv's, motorcycles (including wet clutch), ATV'S, lawn equipment. In addition, the additive came with a part number and it stopped the leak. Finally, the bars leak oil additive for old engines is that with a single application of the bar's leaked oil seal, those problems will be history.

Most buyers agree that the additive is designed to work this way. And, a few strongly agree that the additive is certainly worth a trying at any rate. In addition, a few strongly agree that the oil seal has a more advanced sealing additive package than the engine repair does. Overall, many have used the bars leaked oil additive for old engines for more than a few months without any issues, and it shows no sign of giving up.

• This is a rubber or metal gasket that will seal the seams.
• This will equal one quart of fluid as each bottle is a 1/2 quart.
• This works very well and it works for rear main seal leak.
• This is designed for internal engine seals rather than gaskets.

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

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Compared with other additives in this category, the Zddplus Oil Additive For Old Engines has a convenient design. The zddplus oil additive for old engines is made with great stuff and it is perfect for classic cars. Make sure this fits by entering your model number. In addition, this is compatible with conventional motor oil and it is good for vintage cars.

The additive is compatible with all conventional and synthetic oils intended for automotive use. Lastly, the zddplus oil additive for old engines works great, would be perfect with fast shipping and it is made for good stuff.

Most customers agree that the additive is the best metallic lubricant for flat tappet engines. Further, they say that the additive does not matter what engine it is used in. And, a few say that the additives are important for older cars. In conclusion, many customers have used the additive for more than a few months without any issues, and it shows no sign of giving up.

• This will certainly perform better than today’s oil.
• This can be used in marine, motorcycle and tractor engines.
• Compatible with synthetic and conventional motor oils.
• This is great for restoring ingredients missing from modern motor oil.