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 Post subject: Ethanol content in fuel raised from 2021
PostPosted: Mon Jun 29, 2020 5:59 am 
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Joined: Sun Jul 06, 2014 7:20 pm
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Location: Cadwell Park
Model: 924
This is the first I’ve read on this, but if true it raises some major concerns for those of us running older cars.

Anyone got any further knowledge on this?

https://www.express.co.uk/life-style/ca ... cle-damage

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 Post subject: Re: Ethanol content in fuel raised from 2021
PostPosted: Mon Jun 29, 2020 8:36 am 
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Location: Bournville - Land of Chocolate
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Recent thread:

https://porsche924.co.uk/forum/viewtopi ... it=ethanol

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 Post subject: Re: Ethanol content in fuel raised from 2021
PostPosted: Mon Jun 29, 2020 8:54 am 
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The threat has been a concern for classic car owners for a while Paul, the classic car press is well aware of it. The biggest concern is for rubber fuel system components which will not have been manufactured in period as ethanol resistant, and for which there are no modern reproduction E proof components manufactured, so a lot of owners have to rely on old stock.

Less of a problem for modern classics where there may be current re manufactured parts which should be compliant, could still affect parts in the car which have been in for the last 20/30 years though such as fuel lines, diaphragms or O rings so the problem exists for all of us.

Something like the 924's fuel distributor could be an issue.

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1984 924 N/A RUBY RED METALLIC - 924 of the Show, National 2018
1988 924S Guards Red - sold
1986 924S Guards Red - sold
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1980 924 LE MANS#1 - sold
1980 924 LE MANS#2 - sold
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 Post subject: Re: Ethanol content in fuel raised from 2021
PostPosted: Mon Jun 29, 2020 5:46 pm 
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Location: Birkenhead (UK)
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Hopefully synfuels might start running in bulk in the next few years which will prevent the need to use trashy ethanol.

I can see a few resorting to LPG.

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1983 Silver(ish)/rust n/a manual - Project Candy, SCRAPPED
1982 Guards Red n/a manual - Project 66, SOLD.
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 Post subject: Re: Ethanol content in fuel raised from 2021
PostPosted: Mon Jun 29, 2020 8:41 pm 
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Bit of interesting viewing, courtesy of the MR2 Roadster owners forum. One of the guys was convinced that his car ran better on Shell Optimax and BP Ultimate, despite the pumps indicating a 5% ethanol content same as other fuels, he therefore carried out some simple tests encouraged by the attached video, and demonstrated that these 2 fuels in his location were ethanol free.

The basic argument being that adding Ethanol, be it 5 or 10%, besides gumming up the engine, is giving you only 90 or 95% of effective combustible fuel, the Ethanol adding little to the combustion effect.

Make of it what you will!

https://youtu.be/c3if0nZqgvM

https://onedrive.live.com/?authkey=%21A ... 26&o=OneUp



https://onedrive.live.com/?authkey=%21A ... 26&o=OneUp

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To travel hopefully is a better thing than to arrive - RLS

1984 924 N/A RUBY RED METALLIC - 924 of the Show, National 2018
1988 924S Guards Red - sold
1986 924S Guards Red - sold
1984 924 N/A Black - sold
1980 924 LE MANS#1 - sold
1980 924 LE MANS#2 - sold
1977 924 Martini - sold


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 Post subject: Re: Ethanol content in fuel raised from 2021
PostPosted: Tue Jun 30, 2020 12:02 am 
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Location: Cadwell Park
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Interesting and worrying in equal measure!

(Sorry hadn’t seen earlier thread)

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 Post subject: Re: Ethanol content in fuel raised from 2021
PostPosted: Fri Jul 03, 2020 1:43 pm 
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Joined: Thu Nov 30, 2017 6:21 pm
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Location: Stockholm Sweden
Model: 924
Depends on the car you drive. A K-jet engine might need a tune to insure it gets a bit more fuel.
Most rubbers and plastic are MORE resistant to ethanol than petrol. The biggest issue is that ethanol is a really good cleaner, it will dissolve old petrol varnish and gummed up fuel residues in the system.That might be a hazard.
If you have a turbo, ethanol is pure gold!

If you want pure petrol, do as in the videos above but on a larger scale. Then you have pure petrol, 5-10 % more expensive than before and with lower octane.

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 Post subject: Re: Ethanol content in fuel raised from 2021
PostPosted: Fri Jul 03, 2020 5:02 pm 
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But both Nitrile and more significantly Viton are not compatible with Ethanol.

Viton is normally considered the bullet-proof back-up, so there are your new valve seals gone for a start and I can't think what you can replace them with?

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1983 Silver(ish)/rust n/a manual - Project Candy, SCRAPPED
1982 Guards Red n/a manual - Project 66, SOLD.
1982 Garnet Red n/a manual - Project XLE (463 licensed, 1519 sorn'd)
1983 White n/a manual - Mr White Returns


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 Post subject: Re: Ethanol content in fuel raised from 2021
PostPosted: Fri Jul 03, 2020 5:44 pm 
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dd924 wrote:
But both Nitrile and more significantly Viton are not compatible with Ethanol.

Viton is normally considered the bullet-proof back-up, so there are your new valve seals gone for a start and I can't think what you can replace them with?


And how long before either break down due to ethanol exposure to a point of needing replacing? 5000 miles, 50,000, 500,000? or 1yr, 10yrs, 50yrs?

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1980 924 Turbo Series 1 - Alpine White & Guards Red
Omega forged pistons, lightened and balanced bottom end, ARP studs + Cometic MLS HG, Piper fast road cam, K27/26 3257 hybrid turbo, 951 ducted FMIC, Custom intake manifold, Mittelmotor dizzy & cam pulley, Adj boost - dyno’d at 239.5 rwhp @ 1.05bar, Zeitronix ZT2 & Phormula KS4 knock sensor, 944 turbo all alloy radiator, Hayward & Scott custom tapered race exhaust, GAZ Gold coilovers, Fuch'ed up, Quaife LSD
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 Post subject: Re: Ethanol content in fuel raised from 2021
PostPosted: Fri Jul 03, 2020 6:31 pm 
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Location: Atherstone
Model: 924 na
from what I understand it will only be increased on ron-95 fuels, so the premium stuff we use should stay at 5% for sometime

the legislation is for a maximum content allowed, so even when marked the actual amount could be lower, will be worth keeping an on each sellers literature to see if they announce the actual amounts they are using and shop accordingly

currently sticking with Shell V-power & Tesco Momentum with their 99 ratings and E5 whenever possible

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Chris Valentine (rallyimp)
1981 924rallye NA white - https://porsche924.co.uk/forum/viewtopi ... 24&t=21236 - https://porsche924.co.uk/forum/viewtopi ... =7&t=20065
1966 Hillman Imp Rally Replica https://porsche924.co.uk/forum/viewtopi ... 10&t=28521
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