Absolute rubbish that E10 adversely affects your fuel system in any tangible, noticeable way. Show me the evidence. So the 200+ million cars in the USA using E10 every time the fill up are 'damaging their fuel system' too?
Actually it isnt rubbish at all if you have done any research on the topic or know anything about chemistry. Ethanol can react with certain types of plastics and rubber and modern cars (ie, less than 5-10 years old) have plastics/rubbers designed NOT to react as blends up to 10% can be used; however older cars certainly can be subject to ethanol fuel damage (and usually are).
Here are just a few snippets as it seems you don't like to research for yourself;
Is Ethanol Eating Your Car's Engine? - Forbes
David Sedgwick 2007, "Ethanol: Energy savior or farmer's pork barrel?", Automotive News, [Online], vol. 81, no. 6240, pp. 112, Science Direct (aka, scientific journal)
At least one reason for voiding the warranty is that “the extra ethanol could corrode plastic, rubber and metal parts in cars not built to handle it,” as Hot Air states.
The blend issue is apparently limited to cars with a pre-2001 vintage, which means that the cost of higher ethanol blends would likely to be borne disproportionately by consumers with older vehicles
Add-ons can include a new fuel tank, stainless-steel fuel lines, a new engine control unit and special rubber O-rings
That is in relation to getting cars ready for ethanol blended fuels
Maciel, A.V., Machado, J.C. & Pasa, V.M.D. 2013, "The effect of temperature on the properties of the NBR/PVC blend exposed to ethanol fuel and different gasolines", Fuel, vol. 113, pp. 679-689, Science Direct
NBR (acrylonitrile–butadiene copolymer)/PVC (polyvinylchloride) blends are widely used by the automotive industry for parts of the fuel supply system because they have good resistance to oils, fuels and solvents
and the findings
The ethanol fuel had the most significant impact on the NBR/PVC blend because it promoted the extraction of 21% of the blend constituents (Table 5), regardless of the immersion temperature
The ethanol is polar and extracted the polar components of the blend
Blend referring to the NBR/PVC polymer blend in the fuel system components
The NBR/PVC samples immersed in the ethanol fuel did not swell and showed a weight loss rather than weight gain. The higher polarity of the bioethanol promoted the extraction of a larger quantity of the constituents of the blend compared with the other gasolines studied. Thus, care should be taken when this biofuel is used in the presence of the NBR/PVC blend, as for example in flexible fuel cars
And finally, a warning about using ethanol blended fuels in cases where NBR/PVC is used in the fuel systems due to the polarity of the ethanol.
Also, just for clarity I will cite this as well;
NBR/PVC blend is used in the rubber parts requiring excellent Ozone and Weather resistance. In the automobile industry, many manufacturers have been specifying Polychloroprene rubber (CR) to get ozone and oil resistance in the auto parts
So there you go. I've cited two peer-reviewed scientific studies and a Forbes article. Feel free to do your own research on the topic. But don't tell me its rubbish mate.
End of they day, the only reason that ethanol blended fuels exist is because the EU is hell bent on reducing carbon emissions to the point where all vehicles will soon have to be electric (which opens up another debate) and as such, are essentially forcing the world to shift to blended biofuels. Which in turn also raises concerns about food security as most of the ethanol blended fuels are sourced from corn crops, especially from developing nations which is putting pressure on their food supply chain.
So I stand by my point that ethanol fuels are the anti-christ of fuel systems.