Help, new here and after thoughts on a 100k e89

Specific discussion about the E89 2009 Z4 (sDrive35is, sDrive35i, sDrive30i, sDrive23i)
Busterboo
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Help, new here and after thoughts on a 100k e89

Post by Busterboo » Tue Jan 15, 2019 2:27 am

Good. :thumbsup:
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eff1guy
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Help, new here and after thoughts on a 100k e89

Post by eff1guy » Tue Jan 15, 2019 12:16 pm

Busterboo wrote:
Sun Jan 13, 2019 10:28 pm
In 30k miles in two years, the mpg display's never dropped below 25 fill-to-fill. Long-term it's 26.4.
But how about what it actually works out too by calculation, never mind what the DIS say's :poke:
Next Z landed ..... Z3 3.0i Sport Roadster

Z4 35iS ..... Gone to a new home

Busterboo
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Help, new here and after thoughts on a 100k e89

Post by Busterboo » Tue Jan 15, 2019 6:48 pm

eff1guy wrote:
Tue Jan 15, 2019 12:16 pm
Busterboo wrote:
Sun Jan 13, 2019 10:28 pm
In 30k miles in two years, the mpg display's never dropped below 25 fill-to-fill. Long-term it's 26.4.
But how about what it actually works out too by calculation, never mind what the DIS say's :poke:
Your question assumes that the odometer is accurate, which it probably isn't. Well, not any more than other measuring devices in the car.

Preferring one to another is a waste of time, really. :)
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eff1guy
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Help, new here and after thoughts on a 100k e89

Post by eff1guy » Tue Jan 15, 2019 9:46 pm

Busterboo wrote:
Tue Jan 15, 2019 6:48 pm
eff1guy wrote:
Tue Jan 15, 2019 12:16 pm
Busterboo wrote:
Sun Jan 13, 2019 10:28 pm
In 30k miles in two years, the mpg display's never dropped below 25 fill-to-fill. Long-term it's 26.4.
But how about what it actually works out too by calculation, never mind what the DIS say's :poke:
Your question assumes that the odometer is accurate, which it probably isn't. Well, not any more than other measuring devices in the car.
My question assumes that the DIS is accurate and very often they aren't. What I'm getting at, is do you do a manual calculation to see what you get to the gallon or do you rely on the DIS calculation? A manual calculation is the only true way to see what you're actually getting. i.e. measure the mileage you've done from a full tank to the point that you've re-filled it and then calculate your MPG from that.
Next Z landed ..... Z3 3.0i Sport Roadster

Z4 35iS ..... Gone to a new home

Busterboo
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Help, new here and after thoughts on a 100k e89

Post by Busterboo » Wed Jan 16, 2019 12:28 am

You haven't read what I wrote.
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eff1guy
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Help, new here and after thoughts on a 100k e89

Post by eff1guy » Wed Jan 16, 2019 9:03 am

So in other words you're relying on the DIS calculation which means you could be getting 15mpg for all you know :rofl:
Next Z landed ..... Z3 3.0i Sport Roadster

Z4 35iS ..... Gone to a new home

Busterboo
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Help, new here and after thoughts on a 100k e89

Post by Busterboo » Wed Jan 16, 2019 10:05 am

eff1guy, your assumption that 'accuracy' is available only by reading your odometer and then dividing the number of miles since your last fill by the number of gallons you put in your tank - to give a 'true', comparable mpg - is naïve, because, among other factors:

- The 'accuracy' of your odometer will depend, not least, on your wheel size.
- Your 35iS mileage will read differently from mine, because we have different size wheels.
- Fuel delivery at petrol stations is not 'accurate'. A random AA survey found over-delivery - yes, over - of 4% above pump display.
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mr wilks
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Help, new here and after thoughts on a 100k e89

Post by mr wilks » Wed Jan 16, 2019 1:55 pm

Don't forget tyre pressures Buster :oops: they too can affect mpg :D
Previous Zs :roll:
E86
E85
///MR
Si E85
E89 23i
Si E85
E86
3.0Si E85
///MR
35i Msport 6spd
E86
///MR
E86
35is

911 997 Carrera4


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https://www.instagram.com/andy911wheels/

Busterboo
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Help, new here and after thoughts on a 100k e89

Post by Busterboo » Wed Jan 16, 2019 2:03 pm

And you're right, mr wilks, they can. :D

:thumbsup:
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Phoenixboy
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Help, new here and after thoughts on a 100k e89

Post by Phoenixboy » Wed Jan 16, 2019 3:54 pm

mr wilks wrote:
Wed Jan 16, 2019 1:55 pm
Don't forget tyre pressures Buster :oops: they too can affect mpg :D
:rofl:
E89 s drive 30i manual
space grey
19" 296 wheels with goodyears :)
cruise control
m sport seats
stubby
led halo bulbs
z4 forum sticker, for added power.
Gone: E85 Ruby Black 2.5

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Smartbear
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Help, new here and after thoughts on a 100k e89

Post by Smartbear » Wed Jan 16, 2019 3:59 pm

Phoenixboy wrote:
Wed Jan 16, 2019 3:54 pm
mr wilks wrote:
Wed Jan 16, 2019 1:55 pm
Don't forget tyre pressures Buster :oops: they too can affect mpg :D
:rofl:
Don’t set him off! :lol:
Rob
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e89 Sdrive 20i, plenty of mumbo & good economy-the thinking bears z4 :P
e89 Sdrive 30i, this ones busted, pass me another...
e85 3.0si, i foolishly sold my trouble free car...

Busterboo
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Help, new here and after thoughts on a 100k e89

Post by Busterboo » Wed Jan 16, 2019 6:26 pm

:rofl:

No danger of that, I promise.
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john-e89
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Help, new here and after thoughts on a 100k e89

Post by john-e89 » Wed Jan 16, 2019 9:01 pm

Yeah that’s him....red 35is....
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Massey Ferguson 718 GTS....what were they thinking.....and yet I still bought one..... :oops:
M roady
E89 35is
MR2 mk 2

Just too many toys.....

eff1guy
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Help, new here and after thoughts on a 100k e89

Post by eff1guy » Wed Jan 16, 2019 9:25 pm

:play:
Next Z landed ..... Z3 3.0i Sport Roadster

Z4 35iS ..... Gone to a new home

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Trav
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Help, new here and after thoughts on a 100k e89

Post by Trav » Wed Jan 16, 2019 9:43 pm

You seem to be doing your homeeork so i hope all goes well.
Z4MR A.W.

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