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Ethanol E5 and E10

Post by johnnyonions » Subscribing Member » Thu Sep 06, 2018 1:33 pm
Joined: Tue Apr 28, 2015 11:33 am
Posts: 308
Ethanol in the petrol , currently can be upto 5 percent known as E5 , but EU legislation is allowing it to rise to 10 percent E10, what effect if any does this have on our older engines , especially those who have non hardened valve seats .


Re: Ethanol E5 and E10

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Post by Phil Bradshaw » Club admin » Thu Sep 06, 2018 2:58 pm
Joined: Sun Sep 02, 2012 7:15 pm
Posts: 3818
In terms of valve seat damage probably little measurable change.

Compression ratio is too low for ethanol content to affect ignition timing.

Keep adding your favourite lead replacement additive. :)
  • What is real is not the external form but the idea, the essence of things. Constantin Brâncuși

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