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    Lexus and E10 petrol – can I use it in my car?

    The new E10 petrol grade was introduced across the United Kingdom from September 2021. The move is part of the government’s strategy to reduce harmful emissions from transport

    Although the new E10 petrol retains the same 95-octane rating as existing unleaded petrol, it contains a much higher proportion of ethanol.
    Currently, all petrol supplied at filling stations contains a five per cent mix of ethanol, which is why it is known as E5. However, from September 2021, that proportion will be doubled in standard grade petrol. The fuel will be identified by the code E10.

    This change will not affect Lexus owners with a diesel-powered vehicle.

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    Which Lexus models can use E10 petrol?
    The good news is that the vast majority of Lexus models with a petrol engine or hybrid powertrain and that were officially supplied within the European market since January 1998 are compatible with E10 petrol. The only exceptions to this rule are the following models:

    Lexus IS 250 with 2.5-litre V6 4GR-FSE engine made between August 2005 and September 2007
    Lexus GS 300 with 3.0-litre V6 3GR-FSE engine made between January 2005 and September 2007
    Lexus LS 460 with 4.6-litre V8 1UR-FSE engine made between August 2006 and September 2007

    Can I use E10 petrol in my imported Lexus?
    If your Lexus is an imported model that was not official sold in European markets, we recommend staying on E5 by using super unleaded, which has a higher octane rating. Having received queries from owners regarding specific imported models, we are investigating this further.

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    How can I check if my Lexus can use E10 petrol?
    All new Lexus models manufactured since 2011 and equipped with a petrol engine or hybrid powertrain are compatible with E10 fuel. This can be confirmed by checking the owner’s manual or looking at the information printed on the inside of the fuel filler flap. If you are still unsure, use E5 petrol, which will continue to be dispensed from the super unleaded pump at most filling stations.

    Why is the ethanol content being increased?
    Ethanol is a renewable, non-fossil biofuel produced from sustainable sources. It is made using by-products from the farming industry, such as those from wheat, corn and sugar crops.

    By increasing the proportion of biofuel in petrol, the content of fossil fuel and therefore our reliance on it decreases. This will reduce the overall levels of CO2 (carbon dioxide) emissions from vehicles and help the government achieve its climate change targets. It has been calculated that this change from E5 to E10 petrol will cut harmful transport emissions by 750,000 tonnes a year. That’s the equivalent of taking 350,000 cars off the road.

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    Why isn’t the ethanol content much higher?
    The composition of ethanol is different to that of a crude Oil based fossil fuel such as petrol. Higher blends of ethanol can cause corrosion of some rubbers and alloys used in the engine and fuel systems of some older vehicles.

    A small number of these vehicles will need to continue using E5 petrol, and this will remain widely available at filling stations in super unleaded grade.

    Is this change to E10 petrol only happening in the UK?
    No. In fact, E10 petrol is already common throughout the world. It has also been the reference fuel used for all new car emissions and performance testing since 2016.

    Useful link  -  The government has a simple ‘E10 checker’ tool on its website here

    Original Article Source: https://mag.lexus.co.uk/e10-petrol/




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    Thanks, good to know, that's all fine. What's not fine, is that ethanol has a much lower energy density, which of course means you are getting less energy per litre. Given that prices did not drop by 2p per litre, we are getting less for our money, some 1.5% less - inflation that is not reflected in any CPI.

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    I came a bit of a cropper with this, I’ve driven nothing but diesels for the last 17.5 years, so the switch to e10 completely passed me by. Then I bought a 2005 gs300 last month, filled it up at the nearest garage… almost certainly with e10. Which I later discovered the 3rd gen gs300’s can’t use. 
     

    About a week later lots of Check VSC warning lights came on, which obviously caused me to fret. Then a couple of weeks later, after having topped up a few times with e5 and gradually diluted the e10, after I filled the tank up the Check VSC warning lights disappeared for a while before coming back on. I topped up again last week… and the Check VSC warning lights vanished, never to return.

     

    I can’t prove it, by I’m 99% certain that they were caused the e10 fuel. It can’t be a coincidence, surely? I know that the Check VSC warning lights can be caused by a faulty O2 sensor or an I’ll fitting fuel cap.

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