S40 Trip Computer Current Fuel Consumption Problem
#1
S40 Trip Computer Current Fuel Consumption Problem
The "Current Fuel Consumption" (can also read "Instantaneous") indicator on my S40 Volvo seems to be problematic. The fuel consumption indicated seems to be all over the place, some times reading as high as 45 - 50. Even when stationery it can read 12. What causes this and is it something I should be concerned with. I do not seem to be using excessive fuel and the other indicators, "Average Fuel Consumtion", seem to be working fine.
Last edited by rspi; 11-16-2012 at 12:25 AM.
#2
That's normal. Your instantaneous fuel consumption in a modern car is nowhere near constant. When coasting on the brake, you will often use no fuel as the motion of the car keeps the engine turning. When accelerating it will drop down to just a few MPG. Mine varies anywhere from 6-99MPG in stop-and-go driving. The average consumption is a much better measure of the engine efficiency.
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