Renault Laguna II - Phase 1 - Engines - Average MPG from 1.9 DCi Engine - Page 67 - 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 #331 of 380 (permalink) Old 5th October 2013
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Re: Renault Laguna II - Phase 1 - Engines - Average MPG from 1.9 DCi Engine

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post #332 of 380 (permalink) Old 12th October 2013
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Re: Renault Laguna II - Phase 1 - Engines - Average MPG from 1.9 DCi Engine

on my Megane 1.9 dci I usually average 47.4 and have 115 000 miles on. at present have an egr valve not working due to wiring problem.
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post #333 of 380 (permalink) Old 1st November 2013
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Re: Renault Laguna II - Phase 1 - Engines - Average MPG from 1.9 DCi Engine

Quote:
Originally Posted by simchee View Post
Hi,
i have recently bought 2002 - scenic 1.9 dci and average diesel consumption is 9.5 l/100km or in uk units ~25 mpg.

That is quit a lot reading yours post.

Is there something wrong with my car or with my driving (in town 3rd gear with 2.000 rpm about 32 mph)?
On hi-way consumption is 36 mpg (with air-condition).

What should i do, where to look 4 a problem?

with regards
Sinisa
Very late coming back to this, but two things to think about.
First is that (as commented above) you may be using the fuel consumption as reported by teh car; since that assumes the fuel flow is happening all the time your injectors are open, having partially blocked injectors would give very poor reported consumption figures without having poor performance or even actual poor consumption.
So do a journey from full and reset trip (doesn't need to be long) and then top up again at the end. Compare with the trip meter for the same journey. Volumes should agree, and so should consumption.
So, when you find that the reported value doesn't agree with the actual values, then you will be read to have the fuel system cleaned out.
I have used Redex Diesel Advanced (UK name; search Amazon for "REDEX DIESEL ADVANCED 500ML") as my cleaner of choice; put a bottle into a tank of fuel, and you will get performance improvements almost immediately (within 100 miles) and definitely have a benefit by the end of the tank.
(Note there is a similar named treatment for the Petrol injector system, which I have also used to good effect.)
Do not confuse these treatments with the normal Redex (put a shot in with each tank, as upper cylinder lubricant)
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2001 Laguna II 1.9 dCi Dynamique, 1993 Clio Williams, (1999 SLK230, now gone), 2007 A4 cabriolet
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post #334 of 380 (permalink) Old 7th November 2013
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Re: Renault Laguna II - Phase 1 - Engines - Average MPG from 1.9 DCi Engine

Quote:
Originally Posted by simchee View Post
Hi,
i have recently bought 2002 - scenic 1.9 dci and average diesel consumption is 9.5 l/100km or in uk units ~25 mpg.
Just a point;
30 mpg = 9.5 l/100km
25 mpg = 11.4 l/100km

Generically, (mpg)*(l/100km) = 283.74, so
(mpg) = 283.75/(l/100km), and
(l/100km) = 283.75/(mpg).

(You can obviously approximate using 300; 30 mpg approximates to 10 l/100km, so has a 5% error)
Currently in Tolak's garage:
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post #335 of 380 (permalink) Old 22nd November 2013
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Re: Renault Laguna II - Phase 1 - Engines - Average MPG from 1.9 DCi Engine

Never thought much about the fuel supplier making a difference to the MPG.
Driving from Swindon to Leicester back in July and August when I was working there, I was getting 53mpg for the entire journey with air con going the whole way. When I did it with the air con off I was getting 56mpg. Back then I was filling up at Asda.
I've been working for the last 3 months in Eastleigh and I'm getting about 47-49mpg, but I'm not driving as economically as I was going to Leicester. I am now filling up at Tesco.

I'm back in the office next week, which is in Abingdon, about 25 miles along rubbish A roads, so will be interesting to see what figures I get for that journey. Might also try using an Esso garage as well to see if that makes a difference.

My lag is currently on 153k miles too.
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2004 Renault Laguna II 1.9dCi Privilege
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