77 Lubricants Engine Oil TLE 10W-30

Worth knowing

Within the Engine Oil TLE range, DAF PSQL 2.1E and DAF PSQL 2.1E LD appear only in the data sheet of this 10W-30. The 5W-30 and 10W-40 data sheets say just “DAF”, and the 15W-40 does not name DAF. Both codes sit in the “Exceeds” block, so they are the oil maker’s own statement: of the four catalogue oils with DAF PSQL 2.1E, only one holds the approval. DAF’s split by interval and engine group, and the Daimler Truck numbers, are covered in the overview of truck oil codes.

DTFR 15C100 is approved here, while DTFR 15C110, a low-ash specification with an extended interval, is only declared. The range’s 5W-30 and 10W-40 hold the 15C110 approval, but they are other grades, suitable only where the documentation allows. Hot viscosity does not separate this oil from the 5W-30: both have 12.2 mm²/s at 100 °C and a pour point of -33 °C. The difference shows at 40 °C: 82.6 against 72.5 mm²/s, and in the viscosity index, 146 against 167. The CCS lines (5,650 mPa·s at -25 °C here, 5,900 mPa·s at -30 °C in the 5W-30) use different temperatures, so cannot be compared.