I bought a Mini Pajero model 2010, 660 cc turbo engine. I drove it for about a year with no issue. Then I was driving my Mini Pajero at maximum speed (140 km/h). due to overheating, the 660 cc engine of my Mini Pajero blew up. Anyhow, I searched entire Pakistan for a 660cc Mini Pajero engine. But I couldn't find it. So I had a 1100 cc Mini Pajero engine installed in my Mini Pajero. It has a 35 liter petrol tank. Till about a month ago, my Mini pajero was giving a good per liter average. But suddenly, its average has considerably dropped. before the per liter average drop, I used to drive my Mini Pajero the entire month in one tank. But now, the tank finishes in about 2-3 weeks. Any advice?