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Old Sep 1, 2021 | 03:15 PM
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Default E10 fuel

Do we stick to v-power or switch to E10 any thoughts?
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Old Sep 1, 2021 | 03:36 PM
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Stick with V-power, I will be anyway.
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Old Sep 1, 2021 | 03:49 PM
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V power stays at e5 as far as i can tell
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Old Sep 1, 2021 | 03:53 PM
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Yes it does stay at E5

From the BBC website

Those with incompatible vehicles will have to use E5 super unleaded instead, which the RAC says can cost 12p a litre more than standard unleaded.

Last edited by Rusti; Sep 1, 2021 at 03:55 PM.
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Old Sep 1, 2021 | 04:20 PM
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I'd be interested to see how well a mapped e10 car performs compared to an e5 97+ car, tbh... I think it might be surprisingly good, but then the problem is that the E10 isn't widespread enough yet to make the switch safely (imo).
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Old Sep 1, 2021 | 04:34 PM
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So we stick to v-power and potentially pay 12p per litre more not as if we spend enough on fuel as it is 😂. As per above due to the supposedly higher ethanol rating in e10 it will be interesting to see if it adds anymore power to mapped cars.
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Old Sep 1, 2021 | 05:24 PM
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Originally Posted by Rusti
Yes it does stay at E5

From the BBC website

Those with incompatible vehicles will have to use E5 super unleaded instead, which the RAC says can cost 12p a litre more than standard unleaded.
Yeah apparently my 03 Golf GTI is one of the cars on the list that won't run on this new E10 stuff.
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Old Sep 1, 2021 | 05:34 PM
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Originally Posted by ted bass
Yeah apparently my 03 Golf GTI is one of the cars on the list that won't run on this new E10 stuff.
it's another way to force old cars off the road unfortunately.
does it affect all pre 2003 cars? Or is it car specific? I'm not clued up on it as any news regarding emissions etc I just don't bother with as its all a load of bollocks
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Old Sep 1, 2021 | 05:54 PM
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Originally Posted by the shreksta
it's another way to force old cars off the road unfortunately.
does it affect all pre 2003 cars? Or is it car specific? I'm not clued up on it as any news regarding emissions etc I just don't bother with as its all a load of bollocks
Think it's gonna effect a few makes/models of cars that were manufactured 2000 onwards i believe, i did see a list but can't remember off the top of my head what other cars were on it, just noticed that my Golf was classed as one that won't run on this new bloody stuff allegedly, but like you say another way to get rid of older cars same as dirty diesels.
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Old Sep 1, 2021 | 05:56 PM
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Doubt E10 will add any power: They'll use it as a blend with even lower octane basestock.

In other words 95Ron will still be 95Ron. (and remember minimum LEGAL standard of super is 97Ron...regardless of what octane it says on the pump). But you will use more of it as it's a oxygenate and will make the oxygen sensors throw off the fuel trims and enrich the mixture when running closed loop. And it's overall calorific value is lower (you need more of it to produce the same amount of energy).
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Old Sep 1, 2021 | 06:14 PM
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Originally Posted by ALi-B
Doubt E10 will add any power: They'll use it as a blend with even lower octane basestock.

In other words 95Ron will still be 95Ron. (and remember minimum LEGAL standard of super is 97Ron...regardless of what octane it says on the pump). But you will use more of it as it's a oxygenate and will make the oxygen sensors throw off the fuel trims and enrich the mixture when running closed loop. And it's overall calorific value is lower (you need more of it to produce the same amount of energy).
Ive heard lots of newer cars will be thrown out by e10 as you said no power will come of this because the octane rating is the same 95ron



Last edited by lockheed; Sep 1, 2021 at 06:17 PM.
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Old Sep 1, 2021 | 08:39 PM
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Originally Posted by lockheed
Ive heard lots of newer cars will be thrown out by e10 as you said no power will come of this because the octane rating is the same 95ron
I'll know soon enough when I check my long/short term fuel trims. Chances are it may stay within the limits to not throw a CEL

My bigger concern is if it throws off the oxygen sensor ageing adaption (VAG thing; It actively monitors oxygen sensor response ) and catalyst efficiency monitoring.

With that in mind, if anyone has OBD live data monitoring, it's worthwhile monitoring the fuel trims before switching over.
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Old Sep 1, 2021 | 10:31 PM
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Had a fella come over and had a chat at a Shell the other week. He has a 1 year old Golf R and it run poor on E10.

Last edited by ajones3217; Sep 1, 2021 at 10:33 PM.
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Old Sep 1, 2021 | 11:56 PM
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running poor on e10 95 octane or should have been run on sul 99 e5 , shell 99 or momentum both are fine for the scooby , i think the general consensus from a similar post our cars will be fine , but as we know they should be run on higher octane not 95 , i was told by my engine tuner avoid bp sul as not as good as shell or tesco 99 👍
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Old Sep 7, 2021 | 09:01 AM
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Sorry to reignite this, I presume JDM cars that are 99 only can't use octane boosters on 95 E10? Not seen a post on this yet.
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Old Sep 7, 2021 | 10:08 AM
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just continue to use what you should be using............"super"......
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Old Sep 7, 2021 | 11:34 AM
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super only , ideally not bp sul , so only use tesco 99 or shell 99 , or you risk engine damage , an octane booster only adds a bit more octane , so if you did a 95 and put octane booster in it’s still not enough octane to run safely on , all jdm scoobies that i have had , so 5 cars or so now , have been fine with out a re map on shell or tesco 99 octane
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Old Sep 7, 2021 | 09:18 PM
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Default Lavorg GT on E10?

I'm interested to see how the E10 effects my daily , which is a 2017 Lavorg GT , the gov website says it will run fine but in reality who knows , I'm probably going to fill up in a day or two so fingers crossed I don't notice a difference , .

my 2003 STI I'm not worried about that has always had 99ron .
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Old Sep 7, 2021 | 09:56 PM
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In theory if the car is compatible with it and mapped for it it should produce more power as it raises the octane value albeit with a little loss in mpg.
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Old Sep 8, 2021 | 09:03 AM
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Originally Posted by 1509joe
In theory if the car is compatible with it and mapped for it it should produce more power as it raises the octane value albeit with a little loss in mpg.

How? The knock value of 95Ron E5 will still be 95Ron when E10

99RON E5 would still be 99Ron if E10 (none exist yet).

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Old Sep 8, 2021 | 10:53 AM
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Unless I'm missing something in the mixing of it in theory its the same as running Methanol/Ethanol.
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Old Sep 8, 2021 | 11:59 AM
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Racing fuel like E85 which is 85% ethanol (not 10) and is over 105+Ron.

Forecourt petrol already uses octane boosters to get the base fuel to its 95/99Ron rating. What they will do is substitute that octane booster for more ethanol. Or blend it with octane lower base fuel theyby octane will be the same.

Petroleum is made by blending all sorts from the various stages of refining crude oil. The high octane component derived from crude are usually Alkylates. And it's this component that naturally gives it a higher octane; Blend more lower octane components in like Naphtha and the octane decreases. The target octane is what's on the label at pump. So for E10 95Ron to still remain 95Ron, they are going to use less Alkylates and probably blend in more Naphtha.

As an aside Naphtha makes great easy-start if you ever have a reluctant lawnmower or chainsaw (usually found in plumbing pushfit connector lubricant and WD40)

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Old Sep 8, 2021 | 02:19 PM
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Robbing Peter to pay Paul seems to apply here then usual carry on in todays world.
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