congrats on the purchase of disel rolla, drive safe, and avoid washing engine at service station specially when its hot, this step will ensure ur cars longer pump life. use 20 50 or 15 40 grade engine oil, do oil change before 4000 km as its too hot and u will be driving your car on a.c ofcourse. make sure air filter is clean and in useable condition, chocked air filter effects fuel consumption and pick too much