Assalamo alaikum people
I was using a PSO card for refueling my Altis 2011, and the plugs would get super dirty at 20,000 km. The advisor at Toyota Southern Motors said that their experience for fuels and engine deposits suggested that PSO petrol was dirtiest and Total petrol was cleanest, but this information is not official. So I thought I should change my petrol also.
My car was giving 11km/L filling from PSO company pumps, so I switched to Shell company pumps, got same mileage and same dirty plugs. Now I have switched to Total but they don't have any company pumps so I fill from any that I come across in Karachi. In last 4 fills, car mileage has dropped to 9.5 km/L and I haven't checked the plugs as I usually do it at 20k kms.
The drop in mileage is making me shaky to continue this experiment............is the drop in mileage due to fuel or short filling???? I am thinking of going back to Shell because of the better mileage.
please share your experience with different fuels.