[V8] Oil Weight

[quattro + 5 or 8 = fun]

I personally own 7, licensed, insured, driving cars/trucks.  My immediate
family has close to 20.  All but 2 run synthetic.  They range from a 1972
mercedes to a new A4.  There is a mix of Ford, Chevy, Audi, MBZ, Subaru,
etc., etc.  ONLY the A4 has had Synth since the beginning.  Not of the
converted rigs have leaked.  The oldest conversion of the bunch was the old
MBZ and a 1986 MBZ with 200K miles.  When I switched the V8 over, I
eventually went to Redline in that.  I noticed a MAJOR reduction of oil
consumption.  It went from about 3 qts every 4K miles to about 1.5.  FYI, I
originally started with M1 but when I switched  shortly after.  I will never
go back.  


Shayne


PARTING:  1972 Mercedes Benz 280 SE 4.5
PARTING:  1986 Audi 4000 CS quattro


> From: "Buchholz, Steven" <Steven.Buchholz at kla-tencor.com>
> Date: Wed, 29 Nov 2006 18:15:26 -0800
> To: <v8 at audifans.com>
> Conversation: [V8] Oil Weight
> Subject: Re: [V8] Oil Weight
> 
> My personal justification for continuing to use the non- or semi-synth stuff
> is that the PT/ABH has such a large oil capacity and is equipped with an oil
> cooler means that there really isn't that much stress placed on the oil.  I
> prefer knowing that the shorter replacement intervals means that there's less
> contamination hanging around in the engine overall ...
> 
> Steve B
> San José, CA (USA)
>> 
>> The oil leaks I would not be concerned about. Like most everyone has already
>> said, most of the cars already leak oil and being in the automotive service
>> industry I can tell you that very few vehicles spring new leaks due to
>> changing from dyno oil to synthetic.  Yes, the "varnish" that may be coating
>> older seals that the synthetic oil  cleans away is true. However if the seal
>> leaks because that "varnish" is gone away, the seal was bad to start with,
>> or it was just being held together by a temporary patch or band-aid, the
>> "varnish" on the sealing surface.
>> 
>> However..... In the case of the V8 engines, I WOULD WORRY about the fact
>> that they run very low tension rings on the pistons due to their unique
>> block and piston design. Synthetic oil, due to it's unique molecular
>> structure which coats surfaces much better than dyno oil (impregnates the
>> metal pores better) can in some (certainly not all, those of you who have
>> used it without problems) cases cause excessive oil blowby past the rings
>> and cause the vehicle to use or burn more oil than some of us may like or
>> leave the fun "blue cloud" behind us as we accelerate.