i have a cultus 2012 model, and the problem i am having is that whenever i turn on the AC with blower, car starts to consume so much petrol that it pretty much becomes america 
, i have a suspect which is car alternator, i checked my car voltages when car is running and on 1500 RPM without any load voltages are 13.9 to 14.2 and when i turn the AC,Blowers,Led Lights(Head light), And Windshield vipers ON voltages drop to 13.7 something but after some minutes like 2,3 minutes of constant running voltages drop to 12.9 voltage and even 12.6 (when automatic radiator fan on for some seconds).
Now the confusion is that 13.9-14.2 is a great reading according to my research but i don't know about the voltage after putting load on generator.
Can anybody help me with it ? I will be thankful to you.
