From 1st September 2018, all new vehicles' fuel consumption and efficiency will be calculated using a new method. These will be calculated using the new WLTP standard. WLTP stands for Worldwide Harmonized Light-Duty Vehicles Test Procedure. This is a worldwide standardised testing procedure for determining fuel consumption and exhaust emissions. Find out what this means for you and your Volkswagen.
Longer distances, shorter idle times: WLTP puts the procedure for evaluating a vehicle’s fuel consumption and CO2 emissions to the test. This is how the driving cycles differ.
The standardised NEDC applies for all passenger vehicles and light commercial vehicles. It was introduced by the European Union in 1992 in order to determine the fuel consumption and vehicle-specific emissions and provide comparable values. The following overview shows you the framework on which these measurements are based.
The Worldwide Harmonized Light-Duty Vehicles Test Procedure or WLTP is a worldwide standard for testing passenger vehicles and light commercial vehicles. As of 1st September 2017, it will provide more realistic consumption specifications with its considerably more dynamic testing parameters. Discover more.
The WLTP driving cycle redefines the testing parameters for determining fuel consumption and exhaust emissions. The benefits at a glance:
WLTP utilises a profile more similar to actual day-to-day usage than the previous NEDC standard. This approach is similar to a synthetic laboratory test and primarily serves to enable comparisons between different vehicles without realistically reflecting the actual consumption. Whereas the consumption values were previously measured under abstract laboratory conditions, the new procedure now enables a more precise prognosis of the vehicle’s actual consumption thanks to improved test parameters. WLTP aims to simulate realistic vehicle behaviour in order to achieve far more realistic results.
One of the primary objectives of the WLTP approach is to provide a standardised means of determining exhaust emissions and energy consumption for different engine systems such as petrol, diesel, CNG and electricity. Vehicles of the same type must deliver the same test results everywhere in the world when the WLTP measurement procedure is followed correctly. This necessary comparability is also why laboratory measurement is essential.
For this reason, the fuel consumption and emissions are reliably analysed on the roller dynamometer with a dynamic driving profile.
CO2 reduction is a key aspect of vehicle development. WLTP enables the compliance with international CO2 limits to be checked and documented.
In 2010, the EU alone produced 4.72 billion tons of CO2 emissions. 19% was produced by motor vehicles*. In view of this, the European Union intends to reduce emissions by 20% by 2020**. This goal will be achieved with the help of WLTP. Just like fuel consumption, the CO2 emissions of a vehicle depend on the specific model. WLTP creates greater transparency when comparing the energy consumption and CO2 emissions of different vehicles. This makes the measurements independent of the manufacturer and vehicle type. They also tend to be higher than the NEDC cycle. As a consequence, individual models and their engines will be optimised with a view toward climate protection.
*) The information is based on the paper “Mobility of the Future – Safe and Tested”, 16.03.2015, TÜV e.V.
**) The information is based on the paper “CO2 regulation for passenger vehicles” published by the German Economic Institute of Cologne in 2013.
Your vehicle’s fuel consumption depends on numerous factors that you cannot influence. Nevertheless, a number of simple tricks can still help you to significantly reduce your fuel consumption.
Half the stress, twice the savings: driving at a moderate and constant speed, less braking, moving with the traffic flow, letting the vehicle coast and using momentum all consume significantly less fuel. A driving style like this is also safer and far less stressful.
Third gear at 30 – Changing gears earlier saves fuel. But does driving at low engine speeds actually damage the engine? That's a myth. TDI and TSI engines love to be up in third gear at 30 km/h – they develop an astonishing torque and acceleration at engine speeds as low as 2,000 rpm. Shift into second gear almost as soon as your vehicle starts to move. You can easily skip a gear when shifting up. And always choose the highest gear. 50 km/h in fifth gear is no problem for many vehicles: as long as your vehicle runs smoothly with a normal sound then the engine speed is not too low.
0.0 litres – drive for free! With the right techniques you can truly save fuel. Do you know how to achieve a “current consumption” of exactly 0.0 l/100 km? With the car in gear, just let the vehicle roll or coast along! The fuel cut-off stops the fuel supply to the engine. During this time you won't use even the tiniest drop of fuel. The best time to make use of this clever method is when you can also take advantage of engine braking. Like when you're going downhill or coming up to a red traffic light. Even when disengaging the clutch, you consume significantly less. This is especially effective if you can let the vehicle coast for longer distances thanks to a forward-looking driving style.
Save up to 2 litres with the right choices. Accessories make driving more comfortable but they are also more expensive when used excessively. An air conditioning system, for example, consumes more than a little fuel. Reducing and maintaining the interior temperature during mid-summer will use up to 2 litres per 100 km at low speeds. However, the temperature can also be reduced by ventilating the vehicle before the journey and starting off with the windows briefly open. While you are driving, always check which accessories you are currently using and which ones you actually need.
Saving fuel starts before you even begin your journey. Save up to 15% by simply checking the tyre pressure! Rolling resistance amounts to as much as 15% of the total consumption. If you pump your tyres up to the pressure recommended for the fully loaded vehicle (the values are shown on the tank flap), this reduces the rolling resistance and fuel consumption. When you buy tyres, make sure they have the lowest possible rolling resistance. This saves as much as 3%. Plus, these tyres are also quieter.
Combining journeys saves more because the engine has the highest consumption when it is cold. If you frequently only drive short distances, your fuel consumption can quickly sky-rocket up to 30 l/100 km! However, you can save fuel by combining several stops into one trip. When you make longer journeys, your engine will able to reach the required operating temperature and use a lot less fuel.
Quality saves up to 5%: the quicker the engine is properly lubricated, the faster it produces fewer emissions. This is particularly important for cold starts and short trips. And what's the key quality of a good engine oil? That it spreads quickly.
Low-friction oils can't be beaten on that score. They reduce fuel consumption by up to 5% in comparison to conventional oils. That’s why almost all Volkswagen cars come factory-filled with low-friction oils.
Less drag means more efficiency. Ideal aerodynamics are the key to low fuel consumption, especially at higher speeds. That is why the body of your Volkswagen has been designed to create the least possible resistance. Fittings on the roof like bicycle carriers and roof-top boxes will negate all this. So make sure to remove roof carriers during the times between your ski and mountain bike trips.
The most important questions and answers for the new consumption values.
A driving cycle defines the requirements and conditions for measuring a vehicle’s fuel consumption and CO2 emissions. The goal is to simulate a realistic, average journey with the vehicle. The driving cycle specifies certain conditions such as the starting temperature, speed and measurement duration to ensure that the manufacturers can provide comparable values when registering and selling a vehicle.
The New European Driving Cycle (NEDC) was introduced by the European Union on 01.07.1992. It was intended to guarantee a standardised means of determining the vehicle-specific emissions and consumption and ensure better comparability between vehicles. However, it does not claim to reflect the actual day-to-day consumption.
The Worldwide Harmonized Light-Duty Vehicles Test Procedure or WLTP was introduced in September 2017 and represents a new, worldwide standard cycle. WLTP utilises a profile more similar to actual daily driving behaviour than the previous NEDC standard. The new procedure is intended to provide a more realistic representation of a vehicle’s consumption. This is based on a modified test cycle with stricter test specifications.
The NEDC testing cycle introduced by the European Union in 1992 is outdated and cannot accurately represent individual, day-to-day driving behaviour. In contrast, the new WLTP standard aims to guarantee that the emissions and consumption values measured during a model’s type approval testing reflect the values under real operating conditions. That is why both the procedure and the driving cycle differ from the NEDC standard.
For example, the redefined test parameters include a longer testing distance, longer driving times, shorter idle times and higher average speeds. They also take into consideration optional extras. These new parameters generally result in higher consumption specifications.
As of 01.09.2018, all new vehicles and all new passenger cars will require consumption and exhaust specifications as per WLTP.
No. At present no changes to the model portfolio are planned. Individual models and their engines will have to be optimised in order to achieve even higher efficiency and reduce emissions as per the regulations. However, models will not be discontinued as a result of WLTP.
Yes, there are. The driving cycles for exhaust and consumption measurement developed in Japan (JC 08) and the USA (FTP 75) are more closely oriented on specific situations on the country’s roads. For example, Japan’s driving cycle includes numerous stop-and-go phases and is carried out twice, once as a cold start and once as a warm start.