944 turbo and ethenol in petrol

[jonnyporsche]

Hi all. I'm sure it must have been covered on the forum before but has anyone got a definitive answer on our cars and ethenol in petrol. Are they fine on E10 if not which suppliers do E5. What octanes have more ethenol in etc. Looking on the interweb just is more confusing. Clarification Please Someone[]

 

[jwindwood]

My understanding is that our cars are most definitely NOT OK with Ethanol (According to Porsche.) The quantity in normal unleaded is increasing, but I was advised to use super unleaded which contains proportionally much less Ethanol. Additives are being developed as we speak for when problems occur.

 

[GlennS]

The word from Porsche is here

http://www.porsche.com/uk/accessoriesandservice/classic/news/classicnews/?pool=uk&id=2011-05-23-classic

Basically, no 944 is "safe" on E10. E5 is fine. Porsche say

"These Porsche vehicles may not be run on E10 fuel. As an alternative, Super unleaded (98 RON) can be used. With a maximum bioethanol content of 5% (E5 fuel), Super unleaded is compatible with these vehicles."

Read it whilst your wallet is weeping.

 

[jonnyporsche]

Thanks Glenn. Now its a case of finding out which companies only put 5% ethanol in their high octane petrol as I'm suspecting that they are not all the same.

 

[Mike_Pollock]

The petrol cos at the moment are only allowed to put 5% in the 98RON, 10% is allowed in the standard stuff.

 

[jonnyporsche]

Thanks Mike. Helpfull as always.[]

 

[Hilux]

Its also about the effect ethanol in high concentrations has on materials like alloys and rubber.

We`ll all be having to replace our rubber fuel hoses and filter housings etc with nylon if the concentration is upped.

Its an alchohol so a great degreaser that unclogs cr*p within old systems (blocking injectors and filters etc), attacks rubber and dissolves some alloys

Mind you, your injectors will never have been cleaner []

 

[Mike_Pollock]

I was aware of the damage to some rubber and plastic bits but that's the first I've heard about alloys . What types of allot does the ethanol attack?

 

[Hilux]

Ethanol is alcohol and is therefore capable of dissolving rubber, plastic and solids (rust on steel and corrosion on aluminium alloys)

The result is contaminated fuel and ruptured pipes/containers/filters and fuel rails.