77 Lubricants Motorcycle Oil SYN 4T 15W-50

Worth knowing

A JASO mark on the can does not make an oil a motorcycle oil. The brand’s other 15W-50 in the catalogue, the truck oil 77 Lubricants Engine Oil HDX 15W-50, also has a JASO class, but it is DH-1 from the JASO M355 diesel oil system, with ACEA E7 recorded next to it. So of the brand’s two 15W-50 oils, only this one has the MA and MA2 classes.

If the motorcycle’s manual also allows 10W-50, the same line has SYN 4T 10W-50: the same viscosity of 18.6 mm²/s at 100 °C, but a base of PAO and esters rather than hydrocracked oil. For the winter grade 15W, the data sheet gives a CCS of 3,700 mPa·s at -20 °C, and in the typical-values column this figure is labelled as a maximum. It cannot be compared directly with the 5,400 and 5,800 mPa·s of the 10W-40 and 10W-50 in this line: those were measured at -25 °C. The viscosity grade itself, as the article on JASO MA2, MB and choosing a motorcycle oil points out, is set by the motorcycle maker, not by JASO.