ORIGINAL: Eugoogoly
Just checked the specifiaction of the fuel im using. its 8% synthetic oil and 2% castor oil. Is this killing it?
Are you saying your fuel only has a total of 10% oil?
A .52-sized engine needs at least 17% oil, and preferably 20% with at least 1/4 of the oil content being castor.
10% oil will ruin your engine pretty quickly!