Ethanol in petrol.

[Mojocvh]

Okay, subject as per title.

I'm a wee bit concerned that my [old] P&J's, who love a good bit of octane, will not like these new mixes.

Now I've looked at the Shell site but apart from bumpf there's not much tech info readily available, apart from the worrying fact they have upped upper engine lubricity additives by 25%

However the Momentum99 site does have tech info and it's an interesting read.

So, to surmise,have any PH'ers found or know of valid info for the newer Ethanol mixtures of petrol.

ta

Mo.

[stevieturbo]

It's been in most petrol for quite some time now, so cant be the horror some might claim.

[mygoldfishbowl]

This may or may not be helpful.

http://www.pistonheads.com/gassing/topic.asp?h=0&a...

[Mojocvh]

mygoldfishbowl said:

This may or may not be helpful.

http://www.pistonheads.com/gassing/topic.asp?h=0&a...

Thanks for the pointer

"E10 petrol is cleared for use in all Audi petrol driven vehicles, excluding the following vehicles:

First generation direct injection engines:

[GavinPearson]

The USA has been using E10 for years and is looking to go to E15. Ethanol boosts octane, as a guide E85 fuel has a RON value of about 105.

If a car has a correctly functioning lambda sensor & fuel trim I can't see there being any significant issues going to E10, especially if the vehicle has been sold in the USA, the manufacturer will most likely keep fuel injectors common wherever possible to avoid the risk of parts mixup, resulting in perfectly adequate parts going on engines destined for the UK.

[CrutyRammers]

GavinPearson said:

The USA has been using E10 for years and is looking to go to E15. Ethanol boosts octane, as a guide E85 fuel has a RON value of about 105.

If a car has a correctly functioning lambda sensor & fuel trim I can't see there being any significant issues going to E10, especially if the vehicle has been sold in the USA, the manufacturer will most likely keep fuel injectors common wherever possible to avoid the risk of parts mixup, resulting in perfectly adequate parts going on engines destined for the UK.

The worries largely centre around it rotting old types of fuel hose and seals, often in things which predate lambda sensors

[Steve_D]

As a side question stoich is the AFR where all the fuel is burnt. I have always understood this to be 14.7:1 for petrol.
Does the AFR at stoich change for E10 or E15 fuels?

Steve