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We all know how the oil is important for proper functioning of the engine. It lubricates almost every moving part, reduces friction and wear of the engines internals and helps cool down the whole unit. And that is just the beginning of the story. Older mechanics often say that engine oils are more important than the fuel. If you run out of the fuel you just put some of it in the tank and you are good to go, but if you run out of the oil, your engine is ruined and you’re not going anywhere.

After a hundred or so thousand miles on your engine, engine internals starts to display a certain level of wear after millions and millions or revs over the years. Moving parts like crankshaft, pistons, valves, camshafts and so on are not longer precisely fitted inside of the engine block or engine head and the car loses compression and therefore performance and fuel economy. In other words, the car is old and tired.

But, what to do?

There are two solutions. One, full engine rebuild with new parts and bore out the block. It is a long, complicated and very expensive process which sometimes doesn’t even makes sense.

Second, fresh oil inside your old engine which will rejuvenate the whole engine in a matter of minutes. It is a fast, cheap and very effective way of bringing new life to old and tired powerplants.

If you opt for the second alternative, we got you covered and here is the short introduction to some of the best oils available on the market which is designed especially for old engines with a lot of miles on them and which will make your car run as new after just one oil change.

Valvoline (VV150-6PK) MaxLife 10W-40 Higher Mileage Motor Oil

The name tells it all and not only this is the product of well-known and respected company but it is designed especially for high mileage engines. This is synthetic oil and it performs better than the old mineral ones with additives which help close the seals and prevent the oil from leaking from your engine. It also helps remove the engine’s deposits and sludge.

Buy Valvoline 10W-40 MaxLife High Mileage Motor Oil – 5qt (782482)

Pennzoil High Mileage Vehicle Oil

Another quality product from Pennzoil and this one is not only affordable but very good in preserving your engine and bringing back lost performance and agility. As other similar products, this is also an improved synthetic formula which will reduce wear, help seal the cracks and stop leaking. Also, this oil will have longer intervals and will clean the internals of the engine.

Buy Pennzoil 550045217 5 quart 10W-40 High Mileage Motor Oil (SN Jug)


Mobil 1 45000 5W-30 High Mileage Motor Oil

Mobil 1 is also a well-respected company in the oil business and their products are often the best on the market. The interesting thing about this product is a 5W index of viscosity which means that this is more dense oil than the rest and it is suited for engines with extreme mileage since it will seal it better. So if you have a million miller, this is the oil for you.

Mobil 1 45000 5W-30 High Mileage Motor Oil – 1 Quart (Pack of 6)


Castrol 06470 GTX 20W-50 High Mileage Motor Oil

One of the best products on the market is Castrol’s 06470 GTX synthetic motor oil which is, in fact, a blend of oil with powerful additives. This mix allows the oil not only to fully and properly lubricate the engine and its moving parts but to maintain the seals and reduce the leaks. And, of course, protect it from build ups of sludge. Definitely, a recommended and highly graded product.

Castrol 06470 GTX High Mileage 20W-50 Synthetic Blend Motor Oil, 1 Quart, 6 Pack


Amsoil Extended Life Synthetic Motor Oil

A little bit more expensive option but well worth the price since Amsoil has not only special new formula for older engines but also contains additives that resist the build up of sludge and similar deposits. This way Amsoil is not only preserving your old engine but it keeps it clean for longer.

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