16-08-2018, 09:11 AM
Like Chris, I think the key thing is a certainty of a link between things going wrong and use of a specific fuel. We've all had fuel system problems at some time and some may have a perception of a link but can we narrow the cause down to the fuel only? My only recent 'fuel' related problems have been with the perishing of rubber components, older original ones especially. On all my cars I've reviewed what's in the fuel system from the filler cap to the inlet manifold and worked out older stuff before they crack and perish. Flexible hoses are the obvious thing attacked as they also move a bit and open up cracks but pump diaphragms and carb components are also in the list. The less obvious one I found was a perished sleeve connector on the filler neck. Old age was definitely a factor in this but I suspect, and I've no clear evidence, that modern fuel is another factor.
Dave
Dave