On Mon, 24 Aug 2015 21:07:45 +0100, newshound wrote:

They all contain ethanol which is hygroscopic.

Got a link for that for UK fuels? They are *permitted* to contain 5%,
possibly to be increased soon. Doesn't mean they do.

They do.

The RTFO is a gov't target for a minimum of (currently) 4.75% of road
fuel by volume to be bioethanol, rather than extract of dinosaur.

https://www.gov.uk/government/upload...tachment_data/
file/371589/rtfo-2014-15-year-7-report-1.pdf