E10 versus E5 Petrol

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duncanda
Posts: 51
Joined: Wed Aug 01, 2018 9:17 pm

Post by duncanda » Tue Dec 21, 2021 4:35 pm

I have a 2017 hybrid and I first used E10 petrol early in December on a long return trip from Scotland to Liverpool. To my surprise I only averaged 44mpg in both directions. This was with three up and light luggage. Recently I completed a return trip from Scotland to Nottingham, but due to my disappointment with E10, used E5 instead. I averaged 51mpg with four up and a very full boot. It worked out it was cheaper for me to pay the premium price and use E5 petrol. I use to get high 50s to low 60s mpg on my work commute, prior to E10 with only me onboard.

Has anyone else noticed their fuel consumption increase with E10?

AlanW55
Posts: 212
Joined: Sat Mar 11, 2017 4:31 pm

Post by AlanW55 » Tue Dec 21, 2021 10:39 pm

It's widely reported in the motoring press, search E10 v E5 on Google. The government says the difference in mpg is around 1%, so we can take that with a pinch of salt. Ethanol is not as efficient as petrol, so a reduction in mpg is not surprising. I can't quantify it like you have, but don't doubt what you say. I'll stick with E10 for the environment, if even that's true......
UK 2021 HEV 4 in silky silver, standard spec.
previously UK 2017 First Edition HEV in pearlescent white, standard spec.

duncanda
Posts: 51
Joined: Wed Aug 01, 2018 9:17 pm

Post by duncanda » Wed Dec 22, 2021 7:33 pm

Thanks for your reply. I was mainly interested in mpg, but having read a few articles, I'm not convinced of the environmental benefits of E10.

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