Renault Forums :: Independent Renault forum - View Single Post - Laguna II mpg calculator

View Single Post
post #7 of (permalink) Old 19th March 2007
Diamond member
Eeeps's Avatar
Join Date: Oct 2006
Posts: 447
Nominated 0 Times in 1 Post
TOTW/F/M Award(s): 0
Thanks: 1
Thanked 28 Times in 27 Posts
Originally Posted by Schmooster View Post
They have extremely accurate measuring devices; the ECU and common rail injection system is precision tuned, you're not telling me it doesn't know exactly how much fuel it's using, couple that with total distance travelled and then it's just a very simple calculation. It knows how far I've travelled, this is a journey I've made twice every day for the last 2 years so I know how far it is, it 'estimates' this bang on. It even estimates how far I'll get when I fill up, it'll read 440 miles, or thereabouts, I then drive 330 miles in a week, the estimate usually reads around 100 miles left (give or take 10-15 either way depending) but the average mpg is 41.5 constant, actually it's just gone up to 42.1 this week - which is odd because diesel just went up!

So, if it can estimate the fuel remaing (in terms of miles) and it knows the distance covered since filling up, how can it not know the mpg?

So surely it would read more than I was getting in this case, not less? I get approx 46-50 but it says I'm getting 41.5 (well, 42.1 as of this week).

I know it's screwy, I just wondered if it was common among the model - my guess is it'll be a software error as the sensors seem Ok. It's not km/m conversion because I'd be better off, not worse.

Thanks for your input though guys, it's always appreciated and your opinions valued.

What would be interesting to take note of is the gallons used figure and the miles travelled to see which one does not tally with reality.

Currently in Eeeps's garage:
2011 Clio III dCi 88 Dynamique and 2016 CitroŽn Grand C4 Picasso Exclusive+ EAT6 2.0 BlueHDi
Eeeps is offline  
For the best viewing experience please update your browser to Google Chrome