Toyota Avensis Owner's Manual page 734

6-1. Specifications
1AD-FTV engine without DPF catalytic converter
 Diesel fuel that contains between 50 ppm and 500 ppm of sulfur
Oil grade:
ACEA B1, API CF-4 or CF
Recommended viscosity (SAE):
Temperature range anticipated before
next oil change.
Oil viscosity (5W-30 is explained here as an example):
• The 5W in 5W-30 indicates the characteristic of the oil which allows
cold startability. Oils with a lower value before the W allow for easier
starting of the engine in cold weather.
• The 30 in 5W-30 indicates the viscosity characteristic of the oil when
the oil is at high temperature. An oil with a higher viscosity (one with a
higher value) may be better suited if the vehicle operated at high
speeds, or under extreme load conditions.
734
AVENSIS_OM_OM20B88E_(EE)
SAE 5W-30 is filled into your
Toyota vehicle at manufacturing,
Preferred
and the best choice for good fuel
economy and good starting in
cold weather.
If you use SAE 10W-30 or a
higher viscosity engine oil in
extremely low temperatures, the
engine may become difficult to
start, so SAE 5W-30 engine oil is
recommended.