[V8] Causes of Bad MPG?

[quattro + 5 or 8 = fun]

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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