[Dorchester2]

Originally Posted by torque2me

On that particular engine it might be but the consensus of opinion is they run a little hotter - mine certainly does.
Kev

There'll be no significant difference between E5 and E10 in general and regarding the coolant temperature in particular.
You need to fill in with much more ethanol percentage to detect a difference and the more you fill in with ethanol the cooler will be the coolant.
I'm sorry to say it's not a matter of engine or opinion, but a technical, physical & chemical, effect.

Moreover regarding now the air inlet, ethanol in significant proportion (the more you fill in...) tolerates and even likes warm air (which is absolutely the contrary with petrol as everybody knows) which helps the mix air-ethanol to be better sprayed in micro particles in the injectors.
It's fantastic what I've learnt along the last 5 or 6 years about all those ethanol properties.

At last ethanol is an excellent cleaner of your system and not at all corrosive (I can explain if needed), that's why you are well advised to swap - if necessary - the petrol filter because sometimes some muck might have been gathered in the system along the years. But don't be afraid: I've swapped the petrol filter in both my 4 cyl. Rovers but in my 22 year old KV6 because I don't feel the need at the moment. Another reason: it's far easier (and cheaper) in the 4 cyl. than in the KV6 to swap the filter!

And when last year my good mechanic took off the head in my 25 to swap every gasket & the like, after 3 years of E85 use he noticed that all parts were clean and neat without the slightest alteration and that the spark plugs were nicely light brown coloured and in very good condition: he took pictures at my request to be kept as an evidence.

Hence ethanol in so little quantity (E10) cannot be detrimental but rather slightly positive for your engine chaps...