MPG Calculation
Thread Starter
Lead Lap
Joined: May 2005
Posts: 625
Likes: 3
From: Ca
MPG Calculation
So how is the MPG actually calculated? What are the factors that affect the calculations? RPM and how hard you step on the pedal? Just curious because I'm wondering how acurate the reading really is.
Lead Lap
Joined: Aug 2003
Posts: 573
Likes: 5
From: Vaughan, Canada
Next time you fill up the gas tank monitor the amount of fuel you put in.
Drive the car as you normally would then on fill up again, note how much fuel (quantity) you used up and what distance you travelled.
Do this over a period of 3 times in mixed (city and hwy) traffic and you will in essence have calculated the most accurat mpg consumption.
You will find the onboard reading is not as far off as you suspected... At least in my case it wasn't
Cheers,
Fern
Drive the car as you normally would then on fill up again, note how much fuel (quantity) you used up and what distance you travelled.
Do this over a period of 3 times in mixed (city and hwy) traffic and you will in essence have calculated the most accurat mpg consumption.
You will find the onboard reading is not as far off as you suspected... At least in my case it wasn't
Cheers,
Fern
CL Community Team
Joined: Apr 2001
Posts: 16,557
Likes: 1,385
From: Austin, TX
Is it fair to assume certain volume of gas per engine rpm? In a carb based engine one could not, but in fi maybe?
Salim
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