first off , respect YPVSTony. good response. but with respect I stand by pre-mix , I have heard of pipe blockages, pipes falling off and diaphragm failure all leading to engine seizure. I don't know of any other rdlc using the oil pump with nineteen year old pistons, still in good condition as are mine. as far as practical goes , I have a 350ml pop bottle under the seat with silkolen comp 2 off road t2 oil in it, this is my routine 1. run tank to reserve ,look for garage. 2. enter garage, empty pop bottle into tank 3. put fuel into tank (about 10-13 litres ) 4. once you have paid for your fuel the speed hump on the way out of the garage mixes the fuel/oil for you. job done , totally practical