[V6-12v] C4 100 new owner questions

[Elliott Potter]

On Wed, 23 Jun 2004, Tom Christiansen wrote:

> Hi,
>
> I thought 98 octane (RON) was equivalent to 92 octane (R+M/2). But I may be
> confusing it with the European Premium LEADED which is (or rather used to
> be) 98 octane (RON).

The rule of thumb is MON ~= (RON-10), so AKI ~= (RON-5).  More or less.

> Bottom line: BUY PREMIUM GAS...

Agreed ... people think they can get away with buying midgrade, but you
really shouldn't.  In a pinch, you can put it in, and the ECU has a
different fuel/timing map to compensate, but it will totally gunk up the
top end.
--
Elliott

> Tom
>
> At 06:32 PM 6/23/2004, Elliott Potter wrote:
> >I'm gonna dispute your numbers here ... The recommendations I've seen
> >for minimum fuel octane are 95 RON for AAH and AAH/AFC engines, and 91
> >RON for straight AFC engines.  95 RON is a good rule of thumb for all
> >12v engines.
> >
> >Around here[1], "octane" means "(R+M)/2" (or AKI) ... I think 92 AKI is
> >the recommended minimum.  Running more than one or two octane higher
> >than what's on the fuel door is probably just as bad as running too low
> >octane.
> >--
> >Elliott
> >
> >On Wed, 23 Jun 2004, Tom Christiansen wrote:
> >
> > > Audi recommends using 95 octane ((RON+EON)/2) or 98 octane (RON) in their
> > > vehicles. You may run on a lower octane gas as an emergency but should
> > > switch to 95/98 octane as soon as possible.
> > >
> > > Tom
> > >
> > > At 09:12 AM 6/23/2004, Nathan Widmyer wrote:
> > > >hmm, well, I do use 93 octane only, I could try the injection cleaner
> > > >because it would be easy to run through.  I could take a quick look at
> > > >the MAF sensor too.  I'll see how those turn out if I need to do the
> > > >other items.
> > > >
> > > >On Wed, 23 Jun 2004 07:56:49 -0500, Jon Spensko
> > > ><spensko at cox-internet.com> wrote:
> > > > >
> > > > > Kent,
> > > > >
> > > > > "The car hesitates on acceleration."
> > > > > This could be:
> > > > > Fuel Filter
> > > > > Put some good quality injection cleaner in the gas
> > > > > Run premium gas
> > > > > Vacuum leak, check all lines especially the brake vacuum booster line.
> > > > > Intake plennum seal, AKA: Le Doughnut
> > > > > Dirty MAF sensor
> > > > > (Start with those)
> > > > >
> > > > > regards
> > > > > Jon Spensko ><))>
> > > > >
> > > > >
> > > > >
> > > > > ----- Original Message -----
> > > > > From: "Kent McLean" <kentmclean at mindspring.com>
> > > > > To: <v6-12v at audifans.com>
> > > > > Sent: Tuesday, June 22, 2004 11:32 PM
> > > > > Subject: [V6-12v] C4 100 new owner questions
> > > > >
> > > > > > My new-to-me '94 100S Avant (FWD auto) is not without
> > > > > > its problems.
> > > > > >
> > > > > > - The car hesitates on acceleration. Sometimes it's just a
> > > > > >    subtle stutter. Other times a full fledged "I don't want
> > > > > >    to go".  I need to pull the codes, if it's possible like
> > > > > >    it is on the Type 44 200.
> > > > > >
> > > > > > - There's a slight shimmy from the steering. I presume out
> > > > > >    of balance or out of round wheels and tires. The wheels
> > > > > >    look like they've hit a few curbs (kerbs).
> > > > > >
> > > > > > - When I first shut the car off, I couldn't get the key
> > > > > >    out of the ignition. The owner's manual provided a clue.
> > > > > >    The car has to be in Park to remove the key. On my car,
> > > > > >    it seems the parking interlock is a bit out of adjustment.
> > > > > >    Fiddling with the shift lever trips some switch so I can
> > > > > >    remove the key. Is there and adjustment to be made? Or a
> > > > > >    switch to be replaced?
> > > > > >
> > > > > > I'll have more questions as I put on the miles.
> > > > > >
> > > > > > Regards,
> > > > > >
> > > > > > Kent McLean
> > > > > > '89 200 TQ, "Bad Puppy"
> > > > > > '94 100S Avant, (name to be determined)
> > > > > >
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