Buying diesel: can you still recommend diesel? Advantages and disadvantages

Diesel: That speaks for it, that against it

How did the diesel get into disrepute?


The diesel crisis began in 2015 with the exposure of the VW scandal. VW had manipulated emission control values ​​in terms of nitrogen oxides (NOx, collective name for nitrogen monoxide NO and nitrogen dioxide NO2) millions of times. News about shutdown devices, fraudulent software and dodgy tests ruined the previously positive image of the diesel engine. The exhaust gas values, NOx and fine dust emissions came more and more into focus. In view of the climate crisis, attention is shifting to all combustion engines, and the EU wants to cut CO2 emissions from cars in general.

What about driving bans?


Several cities have due high nitrogen oxide levels from diesel exhaust Driving bans imposed. In Hamburg Since May 2018, there has been a diesel driving ban for cars up to Euro 5 (inclusive) on two streets. In Berlin Driving bans apply for Euro 5 and worse on streets in Neukölln and Moabit. In Darmstadt there is a driving ban for diesel up to Euro 5 and petrol Euro 1-2.

Signs of introduction further diesel driving bans does not exist at the moment.

What funding does the state offer?


The federal government agreed on a compromise in the diesel dispute in autumn 2018. Among other things, he saw one Hardware retrofitting for Euro 5 diesel. The problem: Not all car manufacturers took part in the financing, the federal government did not want to give grants, the car owners had to pay part of the bill. Second, it was decided that the automaker Exchange bonuses when changing from an old diesel (Euro 1-5) to a Euro 6 diesel. There is now one as part of the Corona economic aid package Purchase bonus in the amount of sometimes more than 9,000 euros when buying environmentally friendly electric cars.

How do you avoid Euro 5 diesel driving bans?


With a conversion. In addition to a software update, this includes, above all, the hardware retrofitting of older diesels with a SCR system with urea solution to understand. The costs for this are around 3000 to 3500 euros. Dr. Pley and Advanpure bid Retrofit systems for many common vehicle models at. The filter specialists HJS and Oberland Mangold are also allowed to sell SCR catalysts. Further companies received their approval in 2020.

What are the advantages and disadvantages of diesel owners when it comes to taxes?


Advantages: Diesel drivers pay less energy tax when refueling. Overall, diesel is more than 15 cents per liter cheaper than premium gasoline. However, voices are repeatedly heard calling for the abolition of the so-called diesel privilege.

Disadvantage: As a counterweight to the cheaper fuel at the gas station, diesel cars are subject to a higher vehicle tax, so that they are usually only worthwhile for frequent drivers. The tax depends on the engine size and CO2 emissions. How much is the tax on your vehicle? You can calculate that here in three steps!

Euro 6, 6d-TEMP, 6d ISC-FCM: What’s the difference?


Euro 6 means: On the test bench, the car is allowed to emit a maximum of 80 milligrams of NOx per kilometer. For comparison: With Euro 5 diesels, up to 180 mg / km were allowed. The differences between 6b, 6c, 6d-TEMP and 6d are enormous: Completely different test methods (NEDC, WLTP, RDE) are used for measurements and different limit values ​​apply. This applies not only to the test bench, but also to road operation. Here is an overview:

➤ Euro 6b: On September 1, 2015, all new vehicles had to comply with 6b. Permitted limit value NOx: 80 mg / km (Diesel), 60 mg / km (petrol). Measurements were made exclusively on the test bench, namely after the unrealistic NEDC cycle. These modern Euro 6b diesels blow an average of 507 milligrams of NOx into the air every kilometer.

➤ Euro 6c / 6d-TEMP: The Euro standards 6c and 6d-TEMP came into force in 2017, new models (type approval) must meet both standards. As with 6b, the limit of 80 mg / km, but is measured after the WLTP cycle (Worldwide Harmonized Testing Procedure).

In addition to the test bench measurements, Euro 6d-TEMP the Real output measured on the road (RDE, Real Driving Emissions). The cars are allowed to use the so-called Conformity or conversion factor of 2.1 not more than 168 mg / km NOx (Gasoline engine: 126 mg / km) blow into the air. For all new cars, Euro 6d-TEMP was from September 1, 2019 mandatory. Overview: These SUVs and these compact cars meet Euro 6d-TEMP!
Euro 6d-ISC-FCM: Mandatory for all new cars since January 2021. For this purpose, the limit values ​​for the RDE measurement (i.e. in road traffic) once again tightened: instead of 168, only diesels are allowed 114 mg / km (Gasoline engine: just under 86 mg / km; conformity factor 1.43) Emit nitrogen oxides.
Overview: What emissions standard does my car have?

How much does a diesel consume less than a gasoline engine?


Diesel consume about 15 to 20 percent less fuel than comparable petrol engines. In addition to the higher efficiency of the engine, this is due to the greater energy density of the fuel. However, it has been criticized that the fuel consumption advantage with diesel is due to the high weight of the currently very popular SUVs is compensated. The production of diesel engines is more complex. The German Environmental Aid (DUH) argues that CO2 disadvantages arise here. In addition, modern gasoline engines with full hybrid technology are more efficient than in the past.

How does diesel affect the environment?


As fuel is Diesel is more energetic than gasoline. In addition, the Efficiency of the diesel engine is around 15 percent higher than that of gasoline engines. Because less fuel is burned with the same output, diesel models consume less and therefore emit less CO2. However, it is CO2 content per liter burned Diesel higher than gasoline (2.6 kg to 2.3 kg). For some experts, the climate-friendly diesel is therefore a myth.

But the focus is on the others Pollutantsthat are produced when diesel is burned, such as those that are harmful to health Nitrogen oxides (NOx, collective name for nitrogen monoxide NO and nitrogen dioxide NO2). They can attack the mucous membranes and lead to coughing, breathing difficulties and eye irritation, as well as impairing the heart, circulation and lung function.

That is how large the proportion of diesel in new cars is


Germany was still a diesel country in 2016, and almost every second newly registered vehicle was a diesel engine. In the meantime they commuted Sales figures of the diesel almost a third of all newly registered cars. According to the Federal Motor Transport Authority (KBA), 32.8 percent of all newly registered cars were diesel-powered in 2018; in 2019 it was exactly 32 percent. In 2020 the number was around 28 percent, in the first five months of 2021 she sank up 23.2 percent. in the August 2021 the market share of new diesel cars was only 17.7 percent and thus under a fifth for the third month in a row.

Prices: So it is about discounts on diesel


After the exchange premiums have expired, there are also special ones Discounts for diesel expired. However, many retailers offer because of the Corona crisis sometimes high discounts on existing vehicles to get sales going again. at used diesels In contrast, increased demand and thus stable prices were observed in the course of 2021, as many people bought a used car during the corona pandemic. (The best Euro 6d diesels are available here as new cars at!)

How do the manufacturers react?


Manufacturers always bid fewer models with diesel engines at. As the first major automaker turned Volvo from diesel. Porsche moved to. Since 2015, the manufacturers have deleted the diesel variant from more than 20 model series. In a further 40, the diesel share sank so much that a cancellation can be expected, predicts the Center Automotive Research (CAR) of the University of Duisburg-Essen in a study.
The big manufacturers do not want to completely abandon the diesel. For example, VW will continue to invest money to optimize the diesel, especially with regard to the new Euro 7 standard. VW sales director Klaus Zellmer told the “Merkur”: “There are driving profiles for which diesel engines are still very much in demand, especially among customers with high mileage.”

How is the value of diesel vehicles developing?


Experts reckon with one massive drop in prices in the coming years. The Duisburg Center of Automotive Research (CAR) predicts that by 2030 Europe will only have 390,000 new cars with diesel sold. That would be significantly fewer new diesel engines than electric cars were sold in 2020. Such a radical decline would have a major impact on the value retention of the vehicles. If this prediction is confirmed, prices for cars with diesel will initially fall slowly. But if the next round of acquisitions for the big ones in three to four years Fleet operator If you want to switch to electrified vehicles, prices will start to fall, according to Eurotax. In addition, the price per liter of diesel will rise steadily and the complex Euro 7 diesels will become more expensive.
CAR PICTURE-Editor-in-chief Tom Drechsler predicts that the market for combustion engines will be up 2030 priced stable remain. Only then will the Residual values decrease, while the fuel becomes more and more expensive. Then, as the charging infrastructure improves and the costs of battery production decrease, the current one is reversed ElectricBurnersrelationship um, so the AUTO BILD man: Between 2025 and 2030 it could be more expensive for the first time not to drive electrically.

Diesel or gasoline – which is more worthwhile?


Which diesel can I buy without hesitation?


Above all modern: The ADAC demonstrated in the Ecotest that Euro 6d TEMP diesel average 76 percent less NOx emit than Euro 6b diesel – and 85 percent less NOx than Euro 5 diesel. Samples of measurements on the road would have shown that the Pollution reduction with good Euro 6d TEMP diesels compared to average Euro 5 diesels even at 95 to 99 percent lie.

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