Renault Laguna II - Phase 1 - Engines - Average MPG from 1.9 DCi Engine - Page 37 - 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 #181 of 380 (permalink) Old 21st April 2009
 
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Originally Posted by Jonlucpicard View Post
I have just done my first long run in the Scenic from Manchester to Devon and back.
On the way home i filled up at Sainsburys in Newton Abbott, reset the computer and jumped straight onto the A380.
The computer didn't register any mpg for a couple of miles then it showed 28mpg, by the time we hit Bristol it had climbed to 38mpg and when we got on the M6 it was showing 49mpg.
It went up 1mpg at a time, is that how it should work?
Also i have 205/55 tyres fitted and the originals were 205/50's. How much difference will they make?

Cheers
Jon
Not sure on the scenic but on my Lag II the MPG on the computer used to go up in 0.4 increments I think.

The tyres wont make a difference at all mate. They are just a higher profile, and will give you a slightly better / comfier ride that all.
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post #182 of 380 (permalink) Old 21st April 2009
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The chance of profile will give a slightly different rolling radius, and so will effect your Speedo slightly and so effect the calculations done by the computer. iirc it's only about 1 mile in every 30 difference tho (depending on tyre dia), so not really noticeable
post #183 of 380 (permalink) Old 21st April 2009
 
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Originally Posted by Pat.w View Post
The chance of profile will give a slightly different rolling radius, and so will effect your Speedo slightly and so effect the calculations done by the computer. iirc it's only about 1 mile in every 30 difference tho (depending on tyre dia), so not really noticeable
Oh ok, I'll shut up then

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post #184 of 380 (permalink) Old 21st April 2009
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It's barely worth mentioning in the grand scheme of things Dave
post #185 of 380 (permalink) Old 28th April 2009
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Quote:
The chance of profile will give a slightly different rolling radius, and so will effect your Speedo slightly and so effect the calculations done by the computer. iirc it's only about 1 mile in every 30 difference tho (depending on tyre dia), so not really noticeable
According to my satnav the speedo is spot on.
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