For example, Honda is reported to be testing a 0W-8 motor oil. Looking to the future, OEMs are investigating the use of even lower viscosity motor oils. (As a cautionary note, always check the vehicle’s owner’s manual to verify the OEM recommended oil grade before changing motor oil.) This trend is continuing today with the introduction of even thinner engine oils.įor instance, some new Dodge and Ford models require 5W-20, while newer Toyota and Honda models require 0W-20 and 0W-16 motor oils.
Since the 1980s, the viscosity of motor oil has become gradually lower primarily to improve fuel efficiency. The No.1 motor oil today is 5W-30, which accounts for 56% of the light-duty market.
Prior to 1985, the standard motor oil was 10W-40 however, today it represents just 2% of total sales.
