A document has just been passed to me named “Guidance note for filling station operators on the introduction of E5 patrol and B5 diesel” which was sent to fuel retailers in the UK with regard biofuels.  Obviously, this document refers to retailers, but similar situations will affect motorists.  The note suggests that biofuels are going to be trouble and cost beyond the obvious.  They appear more susceptible to contamination and indeed aggravate it, are likely to attack certain materials, may contain more water which could separate out in the tank and they can increase galvanic and electrolytic corrosion.

Could there be some expensive repair bills on the way?

A copy of the document in pdf form is available here.