Renault Laguna II - Phase 1 - Engines - Average MPG from 1.9 DCi Engine - Page 14 - Renault Forums :: Independent Renault forum

View Poll Results: What is your avarage MPG?
0-10 MPG 1 0.06%
11-20 MPG 6 0.38%
21-30 MPG 85 5.32%
31-40 MPG 498 31.14%
41-50 MPG 868 54.28%
51-60 MPG 116 7.25%
61-70 MPG 15 0.94%
71-80 MPG 1 0.06%
81-90 MPG 1 0.06%
91-100 MPG 8 0.50%
Voters: 1599. You may not vote on this poll

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post #66 of 380 (permalink) Old 28th August 2006
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Originally Posted by Sans Prix
Why should the glow plugs have anything to do with economy? This is not a very professional response to your problem.

It may well be that there was a faulty glow plug but yours is a compression ignition engine and the glow plugs are not spark plugs in a petrol engine. I would not expect to see a difference in mpg on that. More probable would have been a reprogramming of the injection system. Was this mentioned?
I have been advised by my local Renault dealer that the glow plugs are also used for the control of emissions and having two replaced due to the fact that they were also staying on and draining the battery I noticed that the MPG increased by approx 3MPG to 48.
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post #67 of 380 (permalink) Old 15th September 2006
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I have just done about 500 miles in my Laguna 11 2002 1.9 dci.
It has done 130k but runs excellent, little smokey.

I averaged 41 mpg which is a mixture of town, motorway and various speeds. The computer actually got to 62 mpg and never went lower that 53 mpg.

Also, the computer showed that I burned 9 gallons of fuel, but when I filled up it took 15 galloons of fuel so you really cannot take the computer literally..

The only way to check fuel consumption properly is to fill up the tank till the FIRST click, when the pump cuts out (I use BP as these pumps are slower so the fuel doesn't rush up the tank to quickly...) Do a mixture of town motorway driving around 150-200 miles or half a tank. Then go to the same fuel pump as you filled up before and do the same, fill up to the first click......

You will then know how many litres you have used. Work out how many gallons you used (4.5 litres to english gallon)

You can then divide the miles you have done by the gallons and you will have your figure....

Has anyone got a very accurate computer ??? or are they all the same..


Hope this helps
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post #68 of 380 (permalink) Old 15th September 2006
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I take the computer readings only as an approximate guide. Although when comparing the readings I get and calculating the old fashioned way as per your previous post the mpg is usually within +/- 1mpg of the computer. Sometimes high sometimes low.

Also, as the computer calculate ave mpg, the more miles you do between a reset the more accurate it becomes. Reseting after 100 miles will not be as accurate as letting it run for a whole tankful of over 550 miles.

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post #69 of 380 (permalink) Old 11th October 2006
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Hi everyone,

I am new to renault, I have just bought a 2002 Laguna Initiale 1.9 DCi. I am in the forces and commute from Wiltshire to Cornwall weekly, requiring something that was comfortable yet economical. One week in, and I am extremely impressed with the comfort and specification of this vehicle. Will it last the test of time ?????
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post #70 of 380 (permalink) Old 25th October 2006
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Originally Posted by merky View Post
Has anyone got a very accurate computer ??? or are they all the same..
Mine does seem to read about 5mpg low on average, but I too only use it for a rough guide. If I feel the need to be more "accurate" with the figures I'll work it out myself.

It would have been nice if Renault had an instant consumption figure available on the trip comp.


I think I have CDO. It's like OCD, but with ALL THE LETTERS IN THE RIGHT ORDER
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average , dci , engine , engines , laguna , mpg , phase , renault

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