What oil to use in Diesel engine 1.3CDTi , Opel Corsa D 2007 - 5w30 or 5w40 ?
I got 31.000km or 20.000 miles so far.
(The specifications say 5w30 , but still, is 40 better ? )
temperatures here go to -10C (15F) in winter, and +45C (110F) in summer.
I will use semi-synthetic.