my dealer only has 5w-40 oil in stock. i know the manual states 10w-60. just like to find out if anyone here uses a lower weight oil for their JTS (156, GT) and your comments. I know it may affect consumption but i intend to change the oil every 5000km as i do a lot of town driving. I'm now at about 2000km and the 5w-40 oil is still at max.