Siroil
Siroil is a range of engine and transmission oils. Autotools stocks Siroil Extrasint 0W-40, 5W-30 and 5W-40 engine oils, Sint 10W-40, gear oil, ATF and 2T oil.
Extrasint oils cover several specifications, including C2 and C3, VW 504/507, Dexos2 and Mercedes-Benz and BMW approvals. For gearboxes there is 75W-90 GL-4/GL-5 gear oil and ATF Dexron II and III, and for small engines 2T mixing oil and SAE30 lawn mower oil.
Check the specification in your service book, not just the viscosity: a 5W-30 C2 and a 5W-30 C3 are not always interchangeable.