Renault Laguna II - Phase 1 - Engines - Average MPG from 1.9 DCi Engine - Page 32 - 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 #156 of 380 (permalink) Old 27th January 2009
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2001 Megane 1.9dCi 105

Despite having a few problems in the last few months with the EGR Valve and glow plugs (documented elsewhere on this forum) my Megane 1.9dCi regularly returns 45-50 mpg on the urban cycle and 50-55 mpg on a motorway run, albeit at a steady 70mpg.

I regular put a shot of Redex (diesel) in the tank and this seems to help with the mpg as well.
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post #157 of 380 (permalink) Old 28th January 2009
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Quote:
Originally Posted by Fletch View Post
People seem not to understand if you "knock the engine out of gear" then you are still using fuel on idle, however, if you simply release the throttle, on shut down this doesnt inject any fuel at all.
If the engine wasn't injecting "any fuel at all" then it would not be running, if an engine is turning over at all it needs fuel to fire and i assume it takes more fuel to run an engine at 2000 rpm than it does at 1000 rpm surly this is simple physics
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post #158 of 380 (permalink) Old 1st February 2009
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Quote:
Originally Posted by Pat J View Post
I'm averaging around 43mpg out of mine at the moment. I am going to be cleaning the EGR valve and checking the MAF sensor and changing filters etc, will then post up whether mpg has changed after this.
I find my mpg changes depending who's diesel I use as well.


Have you or anyone else treid the Shell V-power Diesel? Been told you get a more responsive drive and more MPG?Is it worth paying the extra few pence a ltr?
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post #159 of 380 (permalink) Old 6th February 2009
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1.9dci 2006 Laguna. - MPG

Mine has consistently given 42 to 47mpg with a 50/50 urban motorway cycle.
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post #160 of 380 (permalink) Old 6th February 2009
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Quote:
Originally Posted by evhop View Post
If the engine wasn't injecting "any fuel at all" then it would not be running, if an engine is turning over at all it needs fuel to fire and i assume it takes more fuel to run an engine at 2000 rpm than it does at 1000 rpm surly this is simple physics
An engine can be turned over with no fuel going to it.
What it can't do is give you any power with no fuel and this would then slow you down (engine braking).
Think of it this way if you rev the engine out of gear it slows down when you take your foot off the accelerator as the fuel going into it has been reduced this is the same when in gear and manufactures have work out that above a certain rev range you don't need any fuel going to the engine at all to keep it turning over.
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2006 laguna II, initiale sports tourer 2.0Dci , but has had laguna 1 rxe (both phases) and a 98 clio rxe and a Laguna II Sports Tourer 1.9Dci Privilege and a Megane Coupe 2.0 16v in red and a 2007 57 plate megane II privilege 1.5 DCi estate (with Panoramic sunroof) and a 2001 Clio 1.4 Privilagein black.
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