E10 fuel and chainsaws?

[Stubby]

1 minute ago, openspaceman said:

I don't think flame speed comes into it very much, I think higher RON fuels has a slightly lower calorific value,  it's just that the lower compression engine burns at much the same temperature but the power stroke expands from a lower initial pressure, so you get less work out of the heat put in. Conversely if you put a lower RON fuel in an engine that is designed for higher RON then as the piston compresses the fuel:air mix it may become hot enough for the fuel to ignite before the spark or, more likely, as the spark starts the combustion, the pressure and temperature from the expanding flame front detonates unburned fuel.

This .

[chopperpete]

There is some info here that may help....recommendation is to use super unleaded, as some fuel has  zero ethanol content....useful if equipment is not used everyday...

The big switch from E5 to E10 fuel | Demon Tweeks Blog

BLOG.DEMON-TWEEKS.COM

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As the rollout continues throughout the summer of 2021 to adopt E10 petrol (with 10% ethanol content) as the standard grade on UK forecourts, it’s a move that could impact hugely...

 

Edited September 18, 2021 by chopperpete

[coppice cutter]

Interesting.

 

I fix motorcycles for gainful employment during the spring/summer and have seen an increase in problems since the introduction of E5 and suspect it's only going to get worse with E10. Specifically all classic bikes or those in infrequent use.

 

The more I look in to Aspen I'm actually wondering if there's a future market there in the motorcycle trade as well as horticultural.

[Stubby]

3 hours ago, coppice cutter said:

Interesting.

 

I fix motorcycles for gainful employment during the spring/summer and have seen an increase in problems since the introduction of E5 and suspect it's only going to get worse with E10. Specifically all classic bikes or those in infrequent use.

 

The more I look in to Aspen I'm actually wondering if there's a future market there in the motorcycle trade as well as horticultural.

I think you are right , however you might not get as much work ...

[SimonHS]

Has anyone tried B3C Ethanol Shield 2T Oil?  It claims to protect from ethanol damage and stabilise mix for 12 months.  I'm going to give it a try, and use E5 only.

 

B3C Ethanol Shield 2-Stroke Oil - 1ltr

B3CFUEL.CO.UK

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PROTECT  your 2-Stroke engine against ring wear, sticking, rust & corrosion PREVENT  future problems with Ethanol Shield 2-Stroke OilPRESERVES fuel with triple...

 

[Dan Maynard]

Has anyone tried B3C Ethanol Shield 2T Oil?  It claims to protect from ethanol damage and stabilise mix for 12 months.  I'm going to give it a try, and use E5 only.
 

B3C Ethanol Shield 2-Stroke Oil - 1ltr

B3CFUEL.CO.UK

---

PROTECT  your 2-Stroke engine against ring wear, sticking, rust & corrosion PREVENT  future problems with Ethanol Shield 2-Stroke OilPRESERVES fuel with triple...  

I haven't tried that, but what E5 are you going to be using? Several of the supers (Esso, BP, Shell I think) will be labelled E5 as required by law but actually be 0% because the label is for "up to 5%" but doesn't mandate a minimum. This is not in all regions though, to be fair.

Just thinking if you have no ethanol then of course the additive will be fine.

I'm thinking the super (ethanol free) is the way to go, I've saws back to 90s and don't actually know how old my chipper is.

[Dan Maynard]

I don't think flame speed comes into it very much, I think higher RON fuels has a slightly lower calorific value,  it's just that the lower compression engine burns at much the same temperature but the power stroke expands from a lower initial pressure, so you get less work out of the heat put in. Conversely if you put a lower RON fuel in an engine that is designed for higher RON then as the piston compresses the fuel:air mix it may become hot enough for the fuel to ignite before the spark or, more likely, as the spark starts the combustion, the pressure and temperature from the expanding flame front detonates unburned fuel.

But now the lower RON fuel has 10% ethanol which has half the calorific value of petrol per kg, so maybe the calorific values are evened up?

[SimonHS]

16 minutes ago, Dan Maynard said:

I haven't tried that, but what E5 are you going to be using? Several of the supers (Esso, BP, Shell I think) will be labelled E5 as required by law but actually be 0% because the label is for "up to 5%" but doesn't mandate a minimum. This is not in all regions though, to be fair.

Just thinking if you have no ethanol then of course the additive will be fine.

I'm thinking the super (ethanol free) is the way to go, I've saws back to 90s and don't actually know how old my chipper is.

Thanks.  I did not know that.  My closest petrol station is BP.  It looks like their Ultimate E5 petrol is ethanol free (for the moment) except in the South West of England.  Good to know.

[openspaceman]

5 hours ago, coppice cutter said:

Interesting.

 

I fix motorcycles for gainful employment during the spring/summer and have seen an increase in problems since the introduction of E5 and suspect it's only going to get worse with E10. Specifically all classic bikes or those in infrequent use.

 

The more I look in to Aspen I'm actually wondering if there's a future market there in the motorcycle trade as well as horticultural.

It may be so if bought 200litres at a time it would just over double the cost, which is insignificant on my low mileage on bikes and 49 year old car. What RON are these alkylate fuels?

 

[neiln]

I think only Esso currently guarantee the super as e free.  Shell stopped a couple of years ago and not sure bp ever have, I just looked on their website and I can't see them claiming anything other than E5.