"Seems that whenever an engine stuffs up everyone wants to jump on the oil ratio bandwagon to justify their cause."
that is so true ,
I used to believe that using the most expensive 2 stroke oil at exactly the right ratio was critical,
then one day went riding with a mate and he mixed up the fuel for both bikes {air cooled Ossa + Yam IT},
when packing up at the end of the day he realised he had made a mistake and had mixed some Silkolene Fork Oil with the petrol instead of Silkolene 2 Stroke Oil !
both bikes ran perfectly all day on the Fork Oil Premix, maybe we where just lucky or maybe these old engines will tolerate different oils & ratios more than you would think
anyway , just saying , not trying to offend anyone,
has anyone else done anything similar ? or are we the only idiots to have done this