So what would you say about me changing regular mineral based engine oils in Karachi at 5000 kms, petrol, CNG and diesel applications.
The engines have lasted for more than 200K and still no work required, I know other people who have had similar results. The oils being used are packaged by Caltex and more known as Havoline Motor oil and Delo 400. Got em from 210 litre drums (the best)
I used to strech the oil change to 6000 if I did highway driving too much on that certain oil.
Either you guys are buying snake oil or you have other problems in your engines, like overcooling or choked PCV.