77 Lubricants Motorcycle Oil 4T 25W-60

Worth knowing

Of the three oils in the 77 Lubricants Motorcycle Oil 4T line, only the 25W-60 has API SL; the 10W-40 and 20W-50 list SN, while JASO MA2 is common to all three. There is no other 25W-60 in this line, and the closest by viscosity, the 20W-50, belongs to a different SAE grade. The article on the API SL class explains what SL requires and which engines API intends it for.

The viscosity at 100 °C, 25.9 mm²/s, lies near the upper limit of SAE grade 60, which spans 21.9 to 26.1 mm²/s, and at 40 °C the oil is almost twice as thick as the 20W-50 of its line: 286.8 against 147.5 mm²/s. The data sheet gives CCS cold cranking not as a typical value but as a maximum, 10,000 mPa·s at -10 °C, whereas the SAE J300 limit for grade 25W is 13,000 mPa·s. This oil’s data sheet gives no sulphated ash figure, although 1.1 % is stated for the other two oils in the line.