Microlighters

I used Castrol 2T (mineral) on my 503 for many years - no problems.
When I bought some more oil (a few 500ml's) I noticed their contents certainly lookes like ordinary golden oil - not blue or green as two stroke should.
I am not sure if any of this ended up in my mixtures and took it back to the Castrol distributors to investigate and are still waiting for an answer from then since January 2008. I have some of the golden oil left as proof but I heard through the grapevine that some Castrol batches had some mix-up problems of product getting into wrong labelled containers etc.

Question: what damage can possibly occur if one or two mixtures actaully made it to my tank before me noticing. I am not sure what the other oil was but as said it definitely looks like ordinary oil.

Any opinions appreciated

Drain your tank, throw all the fuel in the car, it will happily burn it. Then put fresh fuel in the plane and proper 2-stroke oil. 2-stroke oil is specifically coloured to enable the user to see wether he has premixed or not. If the oil was normal golden colour, it was not 2-stroke oil.

Don't take any chances.

Did you run the motor? If so check your plugs, clean if necccessary, flush the rest of your fuel system, clean your carbs. They might be gunged up with the thicker auto oil.