Wanted to document the various engine oils we use, and what we find good, and bad.
Most of the life of my car, it has run on Shell Helix Ultra, fully synthetic. Although last change I tried Delo 400, and it seems to be the best mineral oil for a diesel you can buy in India. I will try this for one more change before deciding to stick with it.
Briefly tried Mobil 1, but removed it quickly(around 2000kms) as my engine started making "vague" sounds.
I used to change the Shell synthetic oil for every 6000 to 7000 kilometers, and will do the same for the delo 400 I am currently running.
What about you? What oil do you put in your cars?