faisalk Posted October 7, 2014 Report Share Posted October 7, 2014 Hey. I am bit worried about my car these days. I have Q45 from 2 years. But the fuel consumption is way too much these days. Can anyone tell me how to diagnose the fuel economy of a car. I am really worried about it. Link to comment Share on other sites More sharing options...
ethan Posted November 15, 2014 Report Share Posted November 15, 2014 There are many reasons for fuel consumption in a car. I can explain you few: >Oxygen Sensor: When the oxygen sensor becomes sluggish, it affects the fuel economy of the car.> Coolant sensor: When the coolant sensor becomes defective or inaccurate, the circulation of the coolant is irregular in the engine. The fuel mixture will not remain rich and it will waste the extra fuel and the fuel consumption will be very high.> Engine Thermostat: Defective thermostat results into high fuel consumption.>> Engine Misfiring: Engine misfiring waste a lot of fuel.> Fuel Injectors: When fuel injectors are dirty it results into low fuel economy.> Oil viscosity: if the viscosity of the oil is not as per requirement of the car, that also leads to poor fule economy.All these things affect the fuel consumption. Link to comment Share on other sites More sharing options...
faisalk Posted November 15, 2014 Author Report Share Posted November 15, 2014 Thank you. Can you explain me oil viscosity in detail. Link to comment Share on other sites More sharing options...
ethan Posted November 16, 2014 Report Share Posted November 16, 2014 See every car has a specific range of oil viscosity which is best suited for that specific car model. If in case you put oil in your car with a different viscosity as required, it affects the engine badly which can result into leaking of oil and ruining your complete car engine. The oil viscosity required for your car is always guided by your dealer, workshop and also mentioned in your car guide book. Link to comment Share on other sites More sharing options...
jatin Posted November 17, 2014 Report Share Posted November 17, 2014 Thanks dude. For explaining. I was looking for a posts about oil viscosity only. I think I got my answer. Thanks man. This forum really helps a lot. Link to comment Share on other sites More sharing options...
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