E10 fuel

[lesxk8]

I have a  year 2000 XK8 4.0 litre V8. Is it Ok to use the E10 fuel or should i upgrade to the super unleaded 97 octane?

[Wrinkly]

32 minutes ago, lesxk8 said:

I have a  year 2000 XK8 4.0 litre V8. Is it Ok to use the E10 fuel or should i upgrade to the super unleaded 97 octane?

Les, Hope this helps you.    https://www.gov.uk/check-vehicle-e10-petrol

Best Wishes and Regards, John

[John Duff]

I know that my 2000 X100 will run ok on E10 fuel but are the rubber up to it? 
I just had a failure of the rubber pipe leading to the fuel filter. Job done now but how about the rest of the pipes in the system?

Thanks

[N6 JMX]

Hi John, this is a bit of a debate about the length of string! Modern cars such as your X-100 will run perfectly fine on E10 fuel as the ECU (brain) will assess and compensate for the higher quantity of ethanol (the E) and the subsequent lower energy density. Logically, the car's perform marginally better on E5, because of the higher energy density, which may also give rise to a marginal increase in the MPG, but lots of different parameters play out on that issue so it would be a pure side benefit.

As to the rubber hoses, yes, ethanol will degrade the rubber hoses in fuel systems, but the reality is that the fuel system has already been exposed to ethanol during its life span on standard unleaded before the introduction of E5 and E10. Would you need to replace the hoses in a 24 year old fuel system, yes. Would you need to do it sooner when using E10, not necessarily, but it is a wise precaution but on an age related basis as opposed to a pure E10 related basis.

Hope this helps.

N6 JMX