DDK - Die Deutschen Klassiker

Enclosed pic is of fuel pipe from my mates 911, it’s around 5years old and as you can see the pipe is showing serious cracks, we put it down to ethanol content in petrol. Check your fuel pipes and replace them with ethanol tolerant rubber pipe.

Is that the pipe from the fuel tank to the fuel pump? What ethanol tolerant replacement have you used?

markm wrote: ↑Tue Mar 07, 2023 12:02 pm Is that the pipe from the fuel tank to the fuel pump? What ethanol tolerant replacement have you used?

Hi Markm,

I believe that any fuel hose that is FKM/NBR and meets the SAEJ30R9 standards while withstanding E5 and E10 grades of bio-ethanol petrol formulations will do the job.
I was wondering which hoses to find, and came across this one ( I am not affiliated with the website or the hose brand anyhow).

https://www.thehosemaster.co.uk/r9-unle ... -fuel-hose

Dennes wrote:

markm wrote: ↑Tue Mar 07, 2023 12:02 pm Is that the pipe from the fuel tank to the fuel pump? What ethanol tolerant replacement have you used?

Hi Markm,

I believe that any fuel hose that is FKM/NBR and meets the SAEJ30R9 standards while withstanding E5 and E10 grades of bio-ethanol petrol formulations will do the job.
I was wondering which hoses to find, and came across this one ( I am not affiliated with the website or the hose brand anyhow).

https://www.thehosemaster.co.uk/r9-unle ... -fuel-hose

From experience last year pretty prompt and speedy delivery from Hosemaster

Sent from my SM-G981B using Tapatalk

The photo missed the key bit! Which SAEJ30 hose is it?

.

The clue is in the thread ...

.

In a related subject I know of two instances where plated hard fuel lines using ethanol fuel have caused issues. The fuel slowly stripping off the plating inside the hard lines and depositing in the MFI injectors. No idea if this is a common emerging problem.

I would recommend a trip to your local Lawnmower or Chainsaw dealer and buying a 5lt bottle of non ethanol petrol.
https://lawn-mower.co.uk/product/aspen- ... roke-fuel/

You can get larger amounts, but if you are storing a car over winter or starting it then this is a good priming fuel and then once you are started, you can fill the car up with e5 or e10 and use a fuel stabilizer. A stabilizer will help with E5/10 corrosion of metals, the flash rate however is not helped as this will degrade over time. Even with a stabilizer the metals and rubbers are effected if left to sit.
At the end of Autumn I give the car a run to drain as much fuel out and take it to a car wash. I drain the remaining ethanol fuel out of the tank and use it in our other cars, then pour in 5 lt of this, give it an Italian tune up and a blow dry to get rid of all the e10 and moisture and then put the car away for Winter , it starts first time in the Spring every time.
I know some motorbike riders of old bikes use only this as they do so few miles. But I can't afford €5/litre prices

.

Esso Energy Supreme+ 99 is ethanol free (in this area at least) - I use it in all my 'old' cars ...

.

Many of these fuel rubber lines are available via type911 etc.
Anyone know if the aftermarket suppliers have/are upgrading their parts to tolerate ethanol?

.
"The SAEJ30R9 specification is designed to withstand modern bio-ethanol enriched petrol (E5 and E10) available at petrol stations" ...

This spec hose is available from multiple stockists at vastly varying prices - the stockist mentioned earlier in this thread is the most expensive I've seen (I usually buy mine from Advanced Fluid Solutions) ...

.

Andy, I was thinking about the pre-formed tight elbow (for example) pipes rather than straight tube.
My 911 has a C2 front mounted fuel pump with Porsche made tight 'U' tubes from tank to pump.
Such a tight bend would make a tube collapse/crease.

That pipe has been on the car since 1994 and the car has only had Shell 97/99 octane in it, but I believe there can be traces of ethanol in Shell fuel.

The Halfords tube I used on the carb'd Lola failed after 5 years using the same fuel as the 911. Failure was it went very hard.
Now has the resistant hose.

Lightweight_911 wrote: ↑Fri Mar 10, 2023 1:09 pm .

Esso Energy Supreme+ 99 is ethanol free (in this area at least) - I use it in all my 'old' cars ...

.

Agree Andy. I have used Esso for 12 years obviously that covers pre ethanol too. I understand the Esso ethanol free is available in most parts of England except the South West and one or two other small areas. To date no issues with hard or soft fuel lines or start up after winter lay up of the cars.

Anyone know the situation with fuel in Europe?

911hillclimber wrote: ↑Fri Mar 10, 2023 4:23 pm I was thinking about the pre-formed tight elbow (for example) pipes rather than straight tube.

Why not just put a metal elbow joint in, instead of bending the pipe?