We are having an issue with wifeys 2012 SC... Since filling her car with this new E10 fuel, her engine management light keeps coming on for "running lean bank 1 & 2"

Any thoughts please wise ones?

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Last edited by ur20v on 4th Oct 2021 6:47am. Edited 1 time in total

E10 petrol has a lower cetane rating than E5 so if the car is set up to optimise performance on E5 then it could give the systems your wife is experiencing. Generally assumed that the lower cetane rating will impact on consumption by circa 5%.

Perhaps try mixing E10 and super unleaded? Or a fuel additive. 2012 tdv8 Westminster arrived Jan 19 gone Dec 23

200 TDi discovery bobtail gone
RR classic v8 bobtail gone
300 tdi Discovery 3 dr gone

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Last edited by ur20v on 4th Oct 2021 6:47am. Edited 1 time in total

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Last edited by ur20v on 4th Oct 2021 6:47am. Edited 1 time in total

Super unleaded is still E5 here...

Craig... Mine runs OK on E10 but it does pink a bit on light throttle high gear situations so I do one tank of each and it seems OK...  Pete

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2014 L405 Autobiography SDV8 4.4 Loire Blue Ebony interior
2011 L322 Vogue SE 4.4 TDV8 Baltic Blue. Parchment over Navy Interior. Sold
2012 L322 Autobiography 5.0 Supercharged Ipanema Sand, Jet Interior. Sold
2002 L322 Vogue 4.4 V8 Epson Green, Ivory over Aspen Interior (Fatty Offroader) Sold
-Click for Project Fatty off roader-

In the UK Super Unleaded is E5.

Dunc. The life you have is the only one you'll get; make the most of it.
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2012 4.4 TDV8 L322 Autobiography
2003 TD5 Oslo Blue D2 ES Premium Auto (with mods!)

Thanks guys, it’s literally happened within minutes of me filling it up with E10 for the first fill up! Drove home, some 30min drive and as I got close to home the EML came on! Strange so I plugged her in and it’s telling me Bank 1 too lean Bank 2 too lean!
Now I’ve just recently changed the snout on the SC so wondered if I’d messed something up? But I’ve checked my work and all is fine… Now every time the car is driven it’s giving the same faults! All within 2 miles or so… Problem is, her full tank may take 2/3 or maybe 4 weeks to empty!

Could try adding something like this…

https://www.halfords.com/motoring/engine-o...66788.html 2012 tdv8 Westminster arrived Jan 19 gone Dec 23

200 TDi discovery bobtail gone
RR classic v8 bobtail gone
300 tdi Discovery 3 dr gone

I use this in the MG (still have a leaded head!)

https://classicvalvemaster.co.uk/products .
Experience is the only genuine knowledge, but as time passes, I have forgotten more than I can remember
Volvo V70 P2 2006 2.4 Petrol 170bhp Estate SE
MG Midget Mk1 1962

Previous: L322 Range Rover TDV8 3.6 2008; L322 Range Rover TD6 3.0 2002; P38A Range Rover V8 1999

Not sure if that'll work on a modern motor with cats n stuff Joe?

has the car been mapped? It could be that the map was optimised for E5 2011 TDV8 Vogue SE

Good question, and a valid point… I’ll ask the question sir… 👍

Throw a litre of xylene in the tank, it will be fine

Don't want to be called an expert, but I have had my name on several petroleum licenses in the past....

Short answer is that ALL my petrol vehciles are running E5 super unleaded now, regardless of what the government suggests. E10 is what we would have considered to be poor quality fuel in days gone by. The older I get, the more I realise that people confuse wrinkles for wisdom