The German brand Audi traces its history back to 1910. The founder of the company was August Horch, due to some legal subtleties the owner was unable to use his surname for the name of the concern, and he named it Audi, this word translated from Latin means “I hear”. The famous logo featuring four rings appeared in 1932. In 1965, Audi was bought by the Volkswagen concern, since then this brand has been owned by the VAG group for more than half a century.
The Audi A6 has been in production for over 20 years. This German car replaced the popular Audi 100 at the end of the 20th century. Front- and all-wheel drive sedans and station wagons are equipped with both gasoline and diesel engines. At different times, a large number of engine modifications were installed with a volume of 1.8 to 4.2 liters. In the lines of Liqui Moly oils, there are several products that are suitable for most versions of the Audi A6 of different generations.

HC-synthetic motor oil Top Tec 4100 5W-40

HC-synthetic low ash engine oil for gasoline and diesel engines of passenger cars. Complies with environmental standards EURO 4 and higher. Has a VW manufacturer approval: 502 00/505 00/505 01.
Top Tec 4100 5W-40 engine oil is produced using the latest synthesis technologies and is distinguished by the highest protective properties. The oil contains a special additive package with a reduced content of sulfur, phosphorus and chlorine compounds, which ensures compatibility with specific neutralization systems and ensures minimal emissions of harmful substances. Top Tec 4100 5W-40 reduces harmful emissions, is compatible with the latest exhaust gas aftertreatment systems, provides fast oil flow to rubbing parts at low temperatures and provides high engine wear protection.

HC-synthetic motor oil Top Tec 4200 5W-30

Recommended for gasoline and diesel engines Audi A6, produced after June 2006. HC-synthetic low ash engine oil for passenger car engines equipped with a dual exhaust gas aftertreatment system, including DPF. Complies with environmental standards EURO 4 and higher. Top Tec 4200 5W-30 has a VW approval: 504 00/507 00 and complies with VW requirements: 500 00/501 01/502 00/503 00/503 01/505 00/505 01/506 00/506 01 (Ausnahme R5 und V10 TDI-Motoren vor 6/2006).
Top Tec 4200 5W-30 is produced using the latest synthesis technologies and is distinguished by the highest protective properties. The oil contains a special additive package with a reduced content of sulfur, phosphorus and chlorine compounds, which ensures compatibility with specific neutralization systems and ensures minimal emissions of harmful substances. The oil ensures engine cleanliness, optimal pressure at any engine speed, reliable lubrication at low and high temperatures, and also reduces fuel consumption and harmful exhaust components.
Top Tec 4200 5W-30 is recommended for use on diesel engines equipped with particulate filters and turbines.
The use of Top Tec 4200 engine oil ensures high reliability of engine operation and an increase in the service life of modern expensive catalytic converters of diesel engine exhaust gases and particulate filters.

Synthoil Longtime Plus 0W-30 synthetic motor oil

Special product for VW vehicles with R5 TDI and V10 TDI engines manufactured before 06.2006.
It is a 100% PAO synthetic multigrade oil specially formulated to meet the specific requirements of the Volkswagen Group. Suitable for use in gasoline and diesel vehicles with and without turbocharging. Significantly reduces fuel consumption and at the same time increases engine life. VW approval: 503 00/506 00/506 01.
The combination of a synthetic base and advanced additive technology guarantees low oil viscosity at low temperatures, high oil film reliability, and also prevents the formation of deposits in the engine, reduces friction and protects against wear.
Synthoil Longtime Plus 0W-30 engine oil has official VAG approval, so its use allows you to maintain all warranty conditions when passing the MOT of the respective vehicles.

The Audi A6 C5 is a premium luxury car, produced in sedan and station wagon bodies from 1997 to 2004. Positioned as the second generation A6, whose history began in 1994 (instead of the Audi 100). The car could be purchased with gasoline power plants 1.8-3.0 liters (125-250 hp), including turbocharged. They also offered diesel versions with a volume of 1.9 and 2.5 liters. The "charged" modifications of the S6 and RS6 had 335 and 444 hp engines under the hood. from. respectively. In 1999, the front-wheel drive A6 was first equipped with a variator. By that time, an off-road version of the A6 appeared in the station wagon body (with the Quattro prefix). In 2001, a restyling of the design and body of the car took place. The suspension and engine range have also been upgraded. In 2004, the next generation C6 replaced the Audi A6 C5.

Regulations for changing the oil in the internal combustion engine

Experienced motorists and experts recommend changing the oil in the Audi A6 C5 engine every 10-15 thousand km. In the case of the presence of old oil in the engine, as well as the systematic refusal to replace it, you will have to face serious consequences. Let's take a look at some of them:

• The oil becomes obsolete, and its lubricating and protective properties deteriorate, which leads to an increase in the dry friction effect of moving parts that interact with each other. This increases the load on the engine, which in the worst case can rattle. This will lead to the inevitability of a major overhaul. The resource of the engine is reduced to the limit, because of which the question of replacing the engine or selling the car for parts will have to be raised. In less advanced cases, the owner will face increased fuel consumption and overheating of the internal combustion engine.
• Outdated used oil removes heat much worse, engine parts overheat, heat up and melt
• Reduced corrosion protection
• Wear products and other mud deposits accumulate in the engine, they become more and more in the oil channels, which are clogged, which leads to the inevitability of overhaul.

What kind of oil to fill in the Audi A6 C5 engine

• Original - 5W-30, 5W-40
• Alternative - Mobil 1 5W-30, Total Quartz Ineo Long Life 5W-30, Motul 8100 X-Cess 5W-40, Castrol Edge 5W-30, Liqui Molly.

Happy owners of Audi A6 C6 cars are sure to face the question of what needs to be poured into the engine for its normal operation? And believe me, the question is quite acute, since the opinions of car owners were divided, and few people can support their argumentation with documents, since most of the cars were imported from Germany, which means that instructions in Russian were not attached to them.

Today we will analyze this topic without leaving open questions for discussion. Naturally, for this we will use the documents. Also, using the example of a 2-liter diesel engine, let's see how do-it-yourself grease change is carried out.

Review of the documentation for the Audi A6

The whole confusion began due to the fact that for cars with maintenance Long Life Services, to which the model in question belongs, it is required to fill in engine oil with the appropriate mark. What does this mean in practice?

• The specified class of maintenance implies that the oil in the Audi engine must be changed every 2 years or 30,000 km.
• Accordingly, the oil must have such characteristics that will allow it to serve as long.

And most of the owners did just that - they needed oil, which is quite expensive. After all, what you will not go for the sake of your beloved iron friend.

And everything would be fine if information resources on the Internet did not claim that filling with ordinary oils is impossible, but in fact everything is somewhat different.

This is what the car's service book, printed in Russian, says:

Engines of A6 C6 cars support two types of maintenance: Long Life and Inspection.

We have already written everything about the first mode.

The second allows the use of standard oils, which are changed every 15,000 km or 12 months.

And here is another photo, which describes the frequency of oil change during inspection service.

Therefore, we immediately issue our verdict - the statement that it is necessary to use only "long-playing oil", we consider unreasonable.

Interesting to know! Automotive "brains" can independently calculate the time to change the Audi engine oil. The idle time, driving style and other factors affecting the deterioration of the properties of the lubricant for the motor are analyzed.

This feature is available for Long Life Services. Alternatively, you can set a mode in which the computer will signal the need for replacement after a certain mileage.

So, to summarize, we will additionally clarify the tolerances. For Long Life Services maintenance mode you can use labeled 504/507 oils.

For the inspection regime, oils VW 501 01, 502 00, 504 00, 505 01 are used. More accurate information can be obtained for a specific type of engine.

What oil to choose for Audi A6 C6

Advice! When changing the oil, in no case is it allowed to mix compounds with different characteristics.

The best option for a diesel engine would be the VW50700. If the oil level has dropped significantly, then no more than 0.5 liters of another type of composition can be topped up.

From which manufacturers is the oil in the Audi A6 best to choose? Most Audi A6 C6 owners prefer the following brands:

• Mobil 5W30;
• Castrol Edge 5W30;
• Total Quartz Ineo Long Life 5W30;
• Motul 8100 X-cess 5W40.

The viscosity of oils is also of great importance. This parameter is determined depending on the climatic conditions of use of the product.

Instructions for changing the oil in the Audi A6 C6

Now let's look at the complete procedure for changing the oil in the Audi A6 C6 engine.

We start by opening the hood and finding the oil filter cover under it.

Advice! Before starting to change the engine oil, it must be warmed up for 10-15 minutes. Warm oil will be thinner, which means it will drain more easily.

We unscrew the oil filter. We do this with a 32 mm wrench (oil filter cup socket).

Removing the oil filter

In this car, the engine oil drain plug has received an accessible location.

Unscrew the plug

It is located almost immediately behind the front bumper of the car.

We substitute the container for working off from below and unscrew the cork with a 19 key.

The oil will then flow downward. We wait until the old grease is completely drained.

As soon as the flow has stopped, we return the plug to its place.

Now you need to remove the oil filter. In order not to burn yourself and not get dirty, we use a clean rag.

We take out the old filter

Advice! Be extremely careful not to drip oil onto the engine, as this could result in a fire as the engine is still hot.

We take a new filter and also lubricate the small ring at its bottom, as shown in the next photo.

Filter lubrication prior to installation

We carry out the installation of a new filter by screwing the cover into place with a key.

Pour new oil into the engine in the required amount through an ordinary funnel. For a 2-liter engine, this is 4 liters.

We check the oil level with the dipstick and let the engine idle a little.

On this, the procedure for replacing engine oil in the Audi A6 C6 can be considered complete. As you can see, there is nothing difficult here. The manufacturer made everything as user-friendly as possible.

Helpful information

At the end of the material, I would like to talk about some points that will definitely come in handy for every owner of the Audi A6, and other cars too.

A car engine can consume up to 0.5 liters of motor oil for every 1000 km, which largely depends on its technical condition and the driver's driving style.

Additionally, the “Bitte Ölstand prüfen” light will help control the oil level, which will light up on the dashboard when the oil level reaches the lower critical mark. As soon as this happens, immediately add grease.

The oil level is checked only on a flat horizontal surface, otherwise the measurements will have inaccuracies.

When adding oil, it is very important not to exceed the upper level mark. Otherwise, it will be thrown out through the ventilation system of the crankcase and exhaust gases. In this case, it will burn in the catalyst, which can soon lead to its damage.

This concludes our brief overview. We have analyzed which oil for the Audi A6 C6 you can use for replacement, and also considered how to do this procedure correctly. Now you can service your car yourself as soon as you need it.

The business car Audi A6 appeared in 1994 as a replacement for the Audi 100 (C4). The fourth generation of the model is currently being produced. The A6 has sedan and station wagon versions, with front or permanent all-wheel drive. Depending on the model year, the model was equipped with gasoline atmospheric and turbocharged engines of various configurations (in-line 4- and 5-cylinder, V6, V8) with a volume of 1.8 - 4.2 liters or TDI diesel engines of 1.9 - 3.0 liters. The sports cars of the S6 and RS6 modifications were equipped with V8 and V10 engines with an output of up to 579 hp.

What kind of oil to fill in the Audi A6 engine depends on its modification and the age of the car.

TOTAL QUARTZ 9000 5W40

Universal oil TOTAL QUARTZ 9000 5W40, which meets quality standards ACEA A3 / B4 and API SN / CF, is recommended by Total specialists as an engine oil for Audi A6 with gasoline and diesel engines (without particulate filter aftertreatment), which require VW 502.00 / 505.00 approvals. It is created using synthetic technology and guarantees a high degree of engine protection against wear and harmful deposits in severe operating conditions, such as city driving or sports driving, as well as easy cold starts. Thermal and oxidation stability of TOTAL QUARTZ 9000 5W40 retains its characteristics even after long mileage between replacements. TOTAL experts advise using this oil in the Audi A6 with TFSI engines equipped with direct injection and turbocharging.

TOTAL QUARTZ INEO LONG LIFE 5W30

When changing the oil in the Audi A6 of those modifications that require lubricants of VW 504.00 / 507.00 standards, it is recommended to use the new generation TOTAL QUARTZ INEO LONG LIFE 5W30 engine oil. Its special formulation with a reduced content of phosphorus, sulfur and metal compounds optimizes the operation of modern exhaust cleaning systems, prevents clogging and prolongs their service life, which makes it possible to use this oil in Audi A6 engines of Euro 5 environmental standards, including those equipped with a diesel particulate filter (DPF) ... The antiwear and cleaning properties of TOTAL QUARTZ INEO LONG LIFE 5W30 provide reliable engine protection in all driving modes and weather conditions, and the oxidation resistance allows this oil to be used in the Audi A6 with extended drain intervals (in accordance with the recommendations of the automaker).

TOTAL QUARTZ 9000 ENERGY 0W30

TOTAL QUARTZ 9000 ENERGY 0W30 oil produced using synthetic technology complies with VW 502.00 / 505.00 standards and can be used as a motor oil for Audi A6, which requires this level of performance. It protects engine parts from wear and deposits in difficult driving conditions for a long time due to excellent performance and exceptional antioxidant properties. Due to the increased fluidity of the oil for the Audi A6 TOTAL QUARTZ 9000 ENERGY 0W30, it guarantees a cold start even at extremely low ambient temperatures (oil pour point -45 degrees).

Oil change in the Audi A6 C6 is done once a year or after every 15,000 km... It is worth noting that the car range of the Audi A6 of the C6 series is represented by many models with different volumes and engine modifications, which affects the oil change in them.

We will consider an example of an Audi A6 C6 with a 2.0 diesel engine.

The engine oil must meet the specifications stated in the Audi service book.

For gasoline engines, the oil specification VW 50101, VW 50200, VW 50400, VW 50501 is established. For diesel engines, VW 50700 oil is used. Only as an exception, VW 50600 / VW 50601 or VW 50500 / VW 50501 oils can be used.

Mixing of oil with other types of oils is not allowed.

In some cases, when the oil level drops to a critical one, you can add another oil (but not more than 0.5 liters) corresponding to the VW 50600 / VW 50601 or VW 50500 / VW 50501 specifications.

A6 owners prefer to fill in such oil:

• Mobil1 5W30;
• Total Quartz Ineo Long Life 5W30;
• Motul 8100 X-Cess 5W40;
• Castrol Edge 5W30.

The viscosity of the oil may vary slightly depending on operating conditions and climatic conditions.

It is worth noting that, depending on driving style and operating conditions, oil consumption can be up to 0.5 liters. for 1000 km. The oil consumption may exceed this value for the first 5000 km. It is recommended that you check the engine oil level every time you drive long distances.

If the oil level falls below the permissible value, the oil level symbol “Bitte Ölstand prüfen” lights up (please check the oil level). When the oil level indicator light comes on, add oil.

When measuring the oil level, the vehicle must be on a level, horizontal surface. After turning off the engine, allow time for the oil to drain into the sump.

The oil level must never exceed the upper permissible value of the mark on the dipstick. If this happens, the oil will be released into the atmosphere through the crankcase ventilation and exhaust system. Also, oil will burn in the catalyst, which can damage it.

How many liters of oil to pour?

• 2.0 TFSI engine - 4.0L;
• 2.4 MPI engine - 6.4L;
• Engine 2.7 - 7L;
• 2.8 FSI engine - 6.3L;
• 3.0 TFSI engine - 6.6L;
• 3.0 TDI engine - 6.4L;
• 3.2 FSI engine - 6.6L;
• Engine 4.2 - 7.5L;

When changing or refilling oil, do not allow oil to come into contact with a hot engine - danger of fire.

To work on changing the oil you will need: 32mm wrench (socket for the oil filter cup), 19mm wrench for the drain bolt, screwdriver, new oil filter, new seal ring for the oil filter box, container for draining the used oil.

After warming up the engine (15-20 minutes), we find the oil filter cover.

Using a wrench and a 32 mm socket for the oil filter cup, unscrew the oil filter.

The oil drain plug is located in an accessible place at the bottom of the engine just behind the bumper of the car.

We unscrew the bolt for draining the oil from the engine, after placing the container into which the old oil will flow out.

We are waiting for the oil to drain from the engine.

In order to avoid "annoying situations", we twist the plug back!

Let's go back to our filter. Take a paper towel or rag and just take it out of the nest. Extreme caution! Do not allow oil to get on the engine, because the engine is still hot and could ignite it.

Separate the filter cover from the filter itself.