fuel gauge?

4.2 V8 32v Naturally Aspirated - 414 bhp
RS6BRIT
3rd Gear
Posts: 403
Joined: Fri Jan 28, 2011 6:22 pm

Re: fuel gauge?

Post by RS6BRIT » Tue Sep 09, 2014 3:26 pm

redrsr wrote:
Ranger Rico wrote:don't do it it will be all the dirty fuel at the bottom.
Never quite worked out if this is true, a fuel tank empties from the bottom, would expect any crap in the fuel after a fill to be the first to be sucked out, am I missing something?
Nah, the fuel pump is mounted in the tank from the top. The bottom of the pump sucks up fuel through a gauze type filter that is fixed to the pump housing and sits just off the bottom. Still its not good practice to run the tank too low as there is more crude toward the bottom that will kick up when low. Also water sinks to the bottom of the tank as its heavier than the petrol and so you could suck up that along with the fuel resulting in a crappy burn and loss in performance.

Also I'm sure that the warning light comes on at different times dependant on how your driving at the time. I've had it on at 25 miles and at 50 miles. You can always get to the actual remaining miles using the + and - buttons though.

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PetrolDave
Cruising
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Re: fuel gauge?

Post by PetrolDave » Tue Sep 09, 2014 3:51 pm

RS6BRIT wrote:Also I'm sure that the warning light comes on at different times dependant on how your driving at the time. I've had it on at 25 miles and at 50 miles. You can always get to the actual remaining miles using the + and - buttons though.
AFAIK the warning light comes on at a fixed level in the tank, but the miles remaining depends on how enthusiastically you're driving (or not!) to generate a short-term averaged mpg figure - so the two will very rarely agree (unless you always drive like you stole it!).
Gone: 2006 B7 RS4 Avant (Phantom Black)

RS6BRIT
3rd Gear
Posts: 403
Joined: Fri Jan 28, 2011 6:22 pm

Re: fuel gauge?

Post by RS6BRIT » Tue Sep 09, 2014 4:57 pm

PetrolDave wrote:
RS6BRIT wrote:Also I'm sure that the warning light comes on at different times dependant on how your driving at the time. I've had it on at 25 miles and at 50 miles. You can always get to the actual remaining miles using the + and - buttons though.
AFAIK the warning light comes on at a fixed level in the tank, but the miles remaining depends on how enthusiastically you're driving (or not!) to generate a short-term averaged mpg figure - so the two will very rarely agree (unless you always drive like you stole it!).

You mean there is another way ??!!!


That makes perfect sense, should have figured that out myself really :bash:

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