Hello guys,i have been using Shell 10w-30 oil in my vehicle for a long time, this oil is semi-synthetic so I want to replace it with a fully synthetic one. I want to use 0w-20 oil for fuel economy but the manufacturer recommends min. 5w-20 oil. Can I use 0w-20 oil on my car ? My car is Hyundai Accent Blue,1.4 D-CVVT nat.asp. engine,60.000 km.The country i live in is max. 35 degrees in summer, min. 0 degrees in winter.
Hello I have a similar Hyundai with a similar engine. In America 5w20 is recommended by Hyundai, however, many Hyundai service centers and owners use 5w30 to avoid potential engine problems in the future which unfortunately these engines have a reputation for developing if lighter oil is used.
What is most important if you would like to see an increase in fuel economy is to make sure that your fuel system and fuel injectors in particular stay clean. Not doing this will rob your engine of power and fuel economy more than anything else.