[V8] 2 Questions: Tires & Gas Mileage

[Ed Kellock]

stock size of 215/60-15 on 15x7.5 et35 rims
optional size overseas 235/50-16 on 16x8 et35 rims
more common size and reasonable fitment for everyday use would be 225/50-16
on 16x7.5 et35 rims
other optional size would be 215/55-16

Audi OEM rim options:
early A6 4.2 winter package wheels 16x8 et35 which came from the factory
with the 235/50's but could easily accomodate 225/50's.
urS6 16x7.5 et37 "Avus" rims
urS4 16x8 et40 rims

Some A4/neuS4 rims will work but their offsets are not quite right at et45
or so.  Some have used these with spacers to push them back out to where
they should be in the wheel well.  I feel the add'l expense, weight, and
hassle of a spacer is not worth it.  Unless you're in love with one of those
wheel designs.  I don't think they look quite right on the V8, regardless of
offset.

Aftermarket could provide more options.  If you go tight with the offset say
et40 or more and you still have UFO's, best to test fit.  I think pretty
much any 16-inch with offset of et35 or less (lower numerically) should be
okay as far any fitment interference is concerned, but may result in pushing
the wheel/tire too far out of the wheel well.

Numerically speaking, higher offset numbers will tuck the wheel/tire further
back inside the wheel well.  Lower numbers will push the wheel/tire out of
the wheel well.

Ed

On 9/26/06, Campozano, Robert <RCAMPOZANO at mgmmirage.net> wrote:
>
> Good morning,
>
> 1.  I am in need of new tires and would like to know what is the correct
> size tire for a 16 inch rim for the V8.  I know I could probably get the
> info from the archives but I do not have access to the archives at this
> time.  So any guidance is appreciated.
>
> 2.  I am at my wits end with my whopping 10-11 miles per gallon.  I have
> replaced my 02 sensor 3 times in the last year and a half and the last
> 02 replacement I replaced the temp. sensor as well which I was told was
> most likely the reason the first 2 02 sensors went bad...the 3rd one
> must be bad again.  The first couple weeks of 02 replacement all is well
> but then slowly but surely gas mileage goes right back down again.
> Un-burnt fuel is pouring out my exhaust at pretty much any speed.
>
> Can a faulty FPR cause this?  I ask because it almost seems like I began
> having these issues when I replaced the FPR.  The car runs pretty cool
> (just above the 75 mark) and rarely gets to the 100 marker.  If I
> replace the 02 sensor and don't reset the fault codes would this cause
> this issue.
>
> Guys, I am ready to get rid of my car because of this issue.  I do not
> mind the 15-17 miles a gallon I was getting a year and a half ago but
> when you are filling up every 160-180 mile of driving at $40.00-45.00
> dollars a fill up it starts to *REALLY* hurt the pocket.
>
> All help is appreciated.  Thanks to all as always,
>
> Zay Campozano | Computer Engineer | MGM MIRAGE(tm)
> rcampozano at MGMMirage.net
>
>
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