E10 petrol: composition, compatibility and maintenance

E10 is a mixture of at least 90 percent fossil fuel and up to 10 percent sustainable bioethanol. E stands for ethanol and 10 indicates its maximum percentage. E5 contains up to five percent bioethanol.

The idea behind E10 is to reduce dependence on fossil fuels. The original article mentions an average reduction in CO2 emissions of 2 percent for cars running on E10. E10 compatibility must still be checked for each vehicle.

Introduction in the Netherlands

Several countries have switched to E10 fuel, including the Netherlands. From 1 October 2019, offering E10 became mandatory for Dutch filling stations with two or more petrol dispensing installations. This requirement did not apply to stations offering a single petrol product.

Many cars can run on E10 petrol without problems. In other vehicles, bioethanol can affect certain rubber and plastic seals, oil seals and gaskets. The ANWB therefore advises using E10 only if your car is compatible with it.

Check the label at the fuel filler flap, the vehicle handbook and the information in the E10 check. Is compatibility unknown? E10check.nl then advises E5 with the same or a higher octane rating and consultation with your supplier.

The original text mentions Euro 95 and premium fuels such as Esso Synergy Supreme+, Shell V-Power, BP Ultimate and Total Excellium as alternatives. Always check both the E5/E10 label and the required octane rating when refuelling; do not rely on a product name alone.

View the E10 check and advice if in doubt

Vehicle information in the E10 check comes from data made available by ACEA, the European association of car manufacturers, and information from official Dutch importers. If in doubt, ask your own garage for advice.

The energy content of bioethanol is slightly lower, so an engine needs a little more of it. The original explanation mentions a difference of two to five percent.

It cites an Australian study with an average increase in consumption of 2.8 percent and figures of around two percent from the German magazine Auto, Motor und Sport. The actual difference also depends on the condition of the engine, driving style and driving conditions.

Bardahl Top Oil lubricates and protects the upper part of the piston and keeps the fuel system clean. This fuel additive is suitable for preventive use with ethanol-containing petrol such as E10.

Top Oil is also suitable for dry fuels such as LPG and natural gas, and for (bio)diesel. Consult the detailed product information for the correct application and dosage. Your vehicle’s compatibility with E10 remains the starting point.

Read the Top Oil product information (PDF)