Hi, my car is a 2008 vrs Octavia, BMN engine, mapped. I've been reading these can do up to 600 miles on a full tank? 🙈

Seems to me a bit of a tall story, I'd be glad if mine achieved 500 miles without refueling. Just wondering what kind of mpg those normally achieve?  

 

I never got less then 600 miles to a tank on a remapped 2006 1.9 PD TDi.

 

However I drove it for economy, the remap was simply to have the power & torque when it was needed on a mid range overtake, I also ran the tank to close to empty every time always going 50 or more miles beyond when the fuel computer said zero miles. I would usually refill with 55-58 litres and have driven 650-700 miles

 

If you are enjoying the power (and why not!) doing urban journeys and not using the full tank capacity then 500 miles seems reasonable.

 

On my first tankfull I wanted to see what the maximum economy was and also just how far I could drive beyond the "Zero miles remaining", I drove really slowly on the motorway and autoroute journey to France, probably 60 mph then spent the week going for long drives exploring local roads free of traffic and getting to know the vehicle, I drove like I was on an economy contest, the car ran out of fuel at 850 miles.

 

The vehicle was not remapped for the initial journeys, I did it after 6 months, the economy did not seem to be affected aside from the first tankfull when I was enjoying the novelty.

Edited 24 November, 20214 yr by J.R.

We have two BMM 2007 Octy estates in the family, one standard and one remapped.  Both average 42mpg or 9.25 miles/litre once warmed up, giving around 450 miles per refill if you stay out of the reserve.

Edited 24 November, 20214 yr by MikeTheThinker

5 minutes ago, MikeTheThinker said:

We have two BMM 2007 Octy estates in the family, one standard and one remapped.  Both average 42mpg or 9.25 miles/litre once warmed up, giving around 450 miles per refill if you stay out of the reserve.

oh noo, that's more like my car, I was thinking maybe if I drove it slower, I'd get more out of it. I do have the impression that fuel consumption has increased since I got it, but it's most likely my driving 🙄  I've also noticed that even a slight increase in speed, from 70 to 80mph, makes a considerable difference in fuel consumption 😆 I was hoping the difference wouldn't be noticeable until I'm doing 90-100mph 😄

1 hour ago, J.R. said:

I never got less then 600 miles to a tank on a remapped 2006 1.9 PD TDi.

 

However I drove it for economy, the remap was simply to have the power & torque when it was needed on a mid range overtake, I also ran the tank to close to empty every time always going 50 or more miles beyond when the fuel computer said zero miles. I would usually refill with 55-58 litres and have driven 650-700 miles

 

If you are enjoying the power (and why not!) doing urban journeys and not using the full tank capacity then 500 miles seems reasonable.

 

On my first tankfull I wanted to see what the maximum economy was and also just how far I could drive beyond the "Zero miles remaining", I drove really slowly on the motorway and autoroute journey to France, probably 60 mph then spent the week going for long drives exploring local roads free of traffic and getting to know the vehicle, I drove like I was on an economy contest, the car ran out of fuel at 850 miles.

 

The vehicle was not remapped for the initial journeys, I did it after 6 months, the economy did not seem to be affected aside from the first tankfull when I was enjoying the novelty.

oh the good old 1.9 tdi, I'll miss them forever. although my 2004 passat was nowhere near as economic, if I managed to get 700 miles out of it, I considered myself lucky and it really took some effort. my 2002 a3 was much better, 6 gears and lighter, it had both fuel and power 😄  shame my vrs won't manage 600 miles.. I drive on motorway mostly, but I drive through town on a weekly basis as well 🙄

28 minutes ago, Martini06 said:

I was thinking maybe if I drove it slower, I'd get more out of it.

On a recent trip with ladders on the roof rack I stayed below 65mph, mainly motorway, and the car ('07 Scout BMM mapped to 180) was reporting mid-50s mpg.  I didn't do an overall mpg check on that run so my numbers are from the 'on the go' mpg figures.

 

6 hours ago, Martini06 said:

  I've also noticed that even a slight increase in speed, from 70 to 80mph, makes a considerable difference in fuel consumption 😆 I was hoping the difference wouldn't be noticeable until I'm doing 90-100mph 😄

 

Wind resistance is 30% more at 80mph than 70 mph which is a 30% increase in fuel consumption on its own, what is often overlooked is that power = work done per unit time, the act of going faster even if there were no increase in wind resistance would require 14% more power, there are lots of other resistances at play but simplistically driving at 80 mph vs 70 mph will increase fuel consumption by a third or more.

 

Working the figures backwards its easy to see that driving at 60 mph massively increases the range on a tank of fuel.

 

At 100 mph you would be consuming more than double the fuel than at 70 mph.

On 24/11/2021 at 18:07, J.R. said:

 

Wind resistance is 30% more at 80mph than 70 mph which is a 30% increase in fuel consumption on its own, what is often overlooked is that power = work done per unit time, the act of going faster even if there were no increase in wind resistance would require 14% more power, there are lots of other resistances at play but simplistically driving at 80 mph vs 70 mph will increase fuel consumption by a third or more.

 

Working the figures backwards its easy to see that driving at 60 mph massively increases the range on a tank of fuel.

 

At 100 mph you would be consuming more than double the fuel than at 70 mph.

Thanks for the info! I didn't know the exact values. No wonder I always need to refuel 😅😆 not gonna fault the poor car. 

Having filled up the tank today the computer says 450 miles, although I've already done 30 miles to it so not bad! 

So, I've taken it easy and done 200 miles to it since filling up the tank and indeed, the gauge has not yet reach half tank, computer now says 280 miles left 🤪 if only. 

Defo it'll be mainly my driving to blame😅