I have a 2006 Motorbike, Suzuki Marauder with a 250cc air cooled engine that uses the same oil for the gearbox. As usual I have an oil question, what oil should I use given its age, were fully synthetic oils about back then or did suzuki use them in the 250 marauder. People are telling me synthetic will not do well in such a low powered engine that will only be used to potter around town with the longest run being 12 miles each way with a break before returning.
Also worried about rust inhibitation, are synthetics using ester liable to hold water and thus cause rust in the gearbox for example.
Not sure I should post this here but I have seen a few motorbike related issues commented on so am taking a chance, not meaning to upset anyone either though so mods feel free to delete.
Thanks in advance.