Rebuild is almost finished and engine is back in one piece and in the frame so its time for the oil, going to use 10/40 but not sure whether to use mineral, semi synthetic or fully synthetic, as the oils about at the time of production were mineral based thought I'd use that but open to...

:(......does anyone know where I can buy 10/40 mineral oil for my XR400 in the Oxford area?

Hi, Sorry if this has been done before but, you don't know if you don't ask. I've just bought myself a 4000 Klm old 2003 Transalp. I'm really pleased with it so far, love the comfortable upright ridding position. I want to change the oil. What is the general consensus, syntheic or mineral...