How to spot the leaking cylinder - old skool way

[johno90]

Probably 'cos ethanol creates more moisture on combustion.
Mine runs on LPG most of the time & I've never used E10, so the above red residue in mine's more likely due
to coolant water getting into the combustion chamber and causing the chemical reaction to produce the red oxide buildup.
It think it's just fine ferric oxide for the most part. The high pressure & high temperature inside the combustion chamber is
ideal to produce that particular oxide of iron.

Unfortantly thats a complete negative. Without going to deep into the actual chemical science it cant be and never has been red oxide.

Only things that make a plug look like that are leaded fuels, fuel that has ethanol or some of those intank additives you can buy. Fyi fuels these days can have ethanol without advertising. Like bp95 has it but doesnt say unless you get the mdss and read it.

If your interested later on i can do the chemical break down of how it happens

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