[V8] Causes of Bad MPG?

Wed Jan 10 18:08:49 EST 2007

As long as you are in the warmer part of the state, I don't see much problem.
I have run Delo 400 15W40 in every car I ever owned and year 'round. It has been
a problem only a few times in the below zero weather, but that does not happen
too often now-a-days - what with the global warming and all :-)

I do have a case of 5W30 oil for my next change though. It is the recommended
oil for the Explorer, and I figured I would try it in the V8 just for fun.
As luck would have it, we are scheduled for a cold snap starting tonight - and
tonight is when I plan to change it. Should be fun. They are predicting hi teens
temps with wind chill at -20 in the high country.
I would have a hard time using the 5W30 in the summer though. It just seems too
light - even though Ford says it is fine. I have never had a oil related failure
in any motor.
(and that includes the time I tore a hole in my Jeep oil pan while fighting a
giant sagebrush)

Dave

Quoting quattro + 5 or 8 = fun <thequattroking at yahoo.com>:

> i don't think you would have a problem. however, when i lived in WA state, i
> tried and experiment one VERY cold night.  i left two bottles of oil sitting
> outside.  one was a 20w50 the other a 10w30.  both were the old mobil1
> formula.  in the morning, before the sun was out, the temp was about 10
> degrees.  I opened both and poured them into a cup.  there was no question
> there was a VISIBLE difference in terms of how the 10w30 poured over the
> 20w50.  the 20w50 was MUCH thicker.  i personally run straight 30 weight in
> my truck all year round.  why?  it has VERY bad stem seals.  30 weight seems
> to slow the blowby a bit.  and honestly, i really could care less about the
> startup effects of the thick oil on a 1986 f350 with a 7.5 liter.  the damn
> thing wont break.  been doing that for 10 years and the thing runs as good
> as it did when i got it.  on my v8 though, the tollerances are much better.
> i am a bit more concerned about that engine.  however, since moving to CA
> all i run is 20w50.
>
>
> Shayne
>
>
> PARTING:  1972 Mercedes Benz 280 SE 4.5
> PARTING:  1986 Audi 4000 CS quattro
>
>
> > From: Ron Wainwright <ron_01056 at yahoo.com>
> > Date: Wed, 10 Jan 2007 13:12:22 -0800 (PST)
> > To: <v8 at audifans.com>
> > Cc: <pjager at telus.net>
> > Subject: Re: [V8] Causes of Bad MPG?
> >
> > Then I am nutz. I've never..repeat never had a problem
> > running 20/50 year round.
> >
> >  Ron Mit 5spd smile...still :-)
> >
> >
> >
> > Date: Wed, 10 Jan 2007 11:01:19 -0800
> > From: Paul Jager <pjager at telus.net>
> > Subject: Re: [V8] Causes of Bad MPG?
> > To: v8 at audifans.com
> > Message-ID:
> > <DLECLFBCCBAOKOODGNHIOEEBJGAA.pjager at telus.net>
> > Content-Type: text/plain; charset=us-ascii
> >
> >
> > Lower the better. Energy efficient oils are very low
> > viscosity. It
> > takes
> > energy to operate and flow in sludge.
> >
> > 20W50 is nuts unless you use a block heater.
> >
> >
> > -----Original Message-----
> > From: v8-bounces at audifans.com
> > [mailto:v8-bounces at audifans.com]On Behalf
> > Of Paul Jones
> > Sent: January 9, 2007 3:33 PM
> > To: v8 at audifans.com
> > Subject: Re: [V8] Causes of Bad MPG?
> >
> >
> > Oil vicosity incorrect? Is there a particular
> > recommended viscosity of
> > oil?
> > What if full synthetic is being run?
> >
> >
> >> From: Paul Jager <pjager at telus.net>
> >> Reply-To: pjager at telus.net
> >> To: V8 list <v8 at audifans.com>
> >> Subject: Re: [V8] Causes of Bad MPG?
> >> Date: Tue, 09 Jan 2007 15:29:12 -0800
> >>
> >>
> >> Dragging parking brake
> >> dragging brakes
> >> insufficient tire inflation
> >> battery issues causing alternator to be in full
> > charge mode
> >> Oil viscosity incorrect
> >>
> >>
> >> -----Original Message-----
> >> From: v8-bounces at audifans.com
> > [mailto:v8-bounces at audifans.com]On
> > Behalf
> >> Of Jason Wilkerson
> >> Sent: January 9, 2007 1:15 PM
> >> To: V8 list
> >> Subject: [V8] Causes of Bad MPG?
> >>
> >>
> >> My new v8q is getting really bad MPG - I replaced the
> > o2 and that
> > worked
> >> on my last v8 - didn't here.  I'm thinking bad wire
> > to the ECU? Bad
> >> ground? Runs like a champ - just about 5 MPG less
> > than my former v8q?
> >> Same years so the running gear is the same.  ANY
> > Ideas will be
> >> entertained.
> >>
> >>        Thanks,
> >>             Jason
> >>
> >
> >
> >
> >
> >
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