Originally Posted By: airwave
Hot & Humid weather in Singapore. It's Honda Fit 1.5 Vtec, manual called for 0W-20 but am skeptical the vicosity is too thin. Changing to 0w-40 may affect fuel economy so what do you think.
Be careful if you have a VVT engine if the camphaser runs off the oil pump. 5w20 or 0w20 is what I would use. Temperature means nothing in a water cooled engine. Honda engines love thin oils. BTW, 5w30 made my CRV Vtec run sluggish.