I find 15€ or more for fully synth. or around 10€ for partly synth. Oil for 1 litre much too expensive. Therefore, the search for cheap shopping sources made me. First I was in the DIY stores. But there the oil was only little cheaper than at the tank. At least where I was. Above all, I found only 1 litre canister. Why is there no 5 liter canister??. So I researched and informed intensively on the net and learned so much. So that all what I have posted here one before, 2 bar oils should meet the following standards:API TC, JASO FB, ISO-L-EGB oils which do not meet these standards I would probably not take personally. What does not mean, however, that you should be absolutely bad. I do not want to start a discussion here ala “synthetic vs. partial synthesizers” or similar. Here it is only about favorable sources of supply and possible experiences with the ever found sources. for all those who want to know more about 2 bar oils, here is a very interesting and informative link:Knowledge about 2 bar oils Cheap Where to buy:Full synthetic – Actually only necessary for very powerful 2 clocks.Tire direct – High Performer 2-stroke oil fully synthetic from 4,90€ per litre + Shipping TOTAL RACING 2T 1 litre 5,99€ + ShippingPartial synthetic – For most 2 clocks absolutely sufficientTire direct – High Performer 2-stroke oil partly syntheti sch from 3,20€ per litre + shipping Partial synthetic two-stroke oil MZ406 5L 19,99€ (1 litre 4.00€) + shippingPartial synthetic two-stroke oil MZ406 20L 69,99€ (1 litre 3.50€) incl. shippingMineral 2 measure oil is hardly worth it in my opinion because it is only about 0,50 – 1€ per litre cheaper than partly synthetic. Even at 1000km of driving performance per month you save the highest 1€. On the other hand, if you have several 2 measurers in use and have to watch on every euro….. That’s why I list the cheapest 2 measure Oil that I found. Maybe already has an experience with it and can post you here. Maybe it is good after all. I like to be surprised. 2,40€ are already very cheap. 2-stroke motor oil – Universal 20 liter 47,99€ (1 liter 2,40€) + shipping Post your sources and experiences.