E5 Bio fuel in Cerb

[alinton]

What are the opinions on using E5 biofuel in the Cerb?

Its 5% bioethanol, 99RON. Apparently suitable for all cars - but what does the Collective think?

A.

[Old Geezer]

I was reading somewhere (might have been the Telegraph yesterday) that the E85 gives more power but lower MPG.

So just a drop of the stuff in the E5 might improve things without the negatives??

I would however suggest that you get their statement on compatability, and perhaps even write to them and ask about high performance engines.

Steve

[Ireland]

Andy,

One of the lads on Octane.ie is running a 200SX on it and he said that the power is better but the economy is much worse.

Have a look on there and you should be able to locate him as he has it mentioned either under the avatar or as a signature.

If it is suitable for the Cerb it may make your life easier ..... no additives needed to get the octane rating up to where you need it.

[jammy_basturd]

Old Geezer said:

I was reading somewhere (might have been the Telegraph yesterday) that the E85 gives more power but lower MPG.

So just a drop of the stuff in the E5 might improve things without the negatives??

I would however suggest that you get their statement on compatability, and perhaps even write to them and ask about high performance engines.

Steve

If you use enough to get any more power then it'll be enough to lose mpg.

In fact the ECU will take a while to register the different mix of petrol and adjust, so while you're getting lower mpg, you're ECU will be adjusting, so you'll probably get more downside than good.

[900T-R]

E5 is a nice marketing term for something that's required by EU law - or becoming required in due course - anyway. All the petrol on sale today has a certain amount of biofuel mixed with it - it started with 2.5% or so and will continue until we reach 5.25 or 5.75% or so in a year or two, which is deemed to be 'safe' for all cars on the road today. It's said tha most cars will be fine with up to 10% biofuel content - but fortunately the Eurocrats have taken the hint that they might not want to push their luck just yet.

[carl_w]

Tesco 99 RON is E5 biofuel -- supplied by Greenergy (see http://www.greenergy.co.uk/tesco_99_octane/FAQs.ht... )

Edited by carl_w on Monday 3rd November 11:18

[Ireland]

What the UK gets is usually very different to what we get here.

There will probably be a difference with this as well.

[Mimic]

hello,

I have got some answers to your questions. In all gas station in EU, IO95 is already E5, without your knowing.
E85 is different. The cerbie's engine isn't calibrated for E85: fuel's consumption is higher, the injectors must be bigger, spark advance must be increased, special treatment on pistonheds and exhaust valves (alcohol is more corrosive)etc. Without precautions, less perf ( power,torque) and more fuel consumption.
With these precautions, 5% more in power and torque for an atmospheric engine. With a good adapted turbo gasoline engine, it's possible to win 15% more power.

To conclude E5 yes! E85 no for your Cerb !

Advices from an engine test bench engineer from France

[ridds]

Not sure about the power increase thing myself.

Engine tests I have performed have shown no gain in performance in non-knock controlled N/A engines without re-optimising spark and fuel timing. Boosted ones could well see improvements but again it would need to be re-optimised to gain the true benefits.

Engines with knock control will show some gains, again the Cerb does not have this.

These gains are obtained by the more advanced spark, NOT the fuel itself.

Bio-Ethanol has a lower calorific value than straight petrol so it shouldn't show any gains.

DO NOT put E85 anywhere near a Cerb without a lot of tinkering with pumps, injectors, a new tank, remap, etc etc etc.