I am using standard available fuel across Dubai, i.e. Special and Super. Ford Dubai is telling me that in past couple of months some bad fuel came in Dubai with high quantity of Megnese which caused this, now its fine as per Service center representative. so the damage has been done and they charged me. But I am not satisfied with this reply from Ford UAE. UAE is among the GCC which produce very good oil, i can not expect this atleast in this region known for good fuel.