[s-cars] Synthetic oil weight rec's

[Wylie Bean]

I went with the 15W-50 M1. It has been nice the past two days, but I usually run heavy in the summer, and 10W-40 in winter. 
Wylie Bean
TheRingmeister at triad.rr.com
90 cq
91 90q20v
92 UrS4
08 Q7 3.6
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-----Original Message-----
From: Thomas R Green <trgreen at comcast.net>
Date: Thu, 1 Jul 2010 22:37:50 
To: s-car-list<s-car-list at audifans.com>; W. Bean<theringmeister at triad.rr.com>
Subject: Re: [s-cars] Synthetic oil weight rec's

I recommend you pick a good synthetic, Wylie.  I buy 15-50 M1 in the 5  
gallon jugs at Walmart here.  Usually I can find Rotella synthetic    
there in the gallon jug.  I look for the protection recommended in the  
owners manual for continuous high speed driving in the summer since  
we've had two continuous weeks in the 90s.

Tom '95 S6
          '95.5 S6 avant


> -----Original Message-----
> Date: Fri, 2 Jul 2010 01:31:17 +0000 (UTC)
> From: racingiron at comcast.net
> Subject: Re: [s-cars] Synthetic oil weight rec's
> To: lee at wheelman.com
> Cc: S-CAR list <s-car-list at audifans.com>
> Message-ID:
> 	<1481232701.48980.1278034277656.JavaMail.root at sz0060a.westchester.pa.mail.comcast.net 
> >
> 	
> Content-Type: text/plain; charset=utf-8
>
>>> I like Syntec myself. Don't forget that Mobil 1 is no longer full
>>> synthetic as of about 4 years ago.
>>
>> I'm confused.
>
> You're not alone. I'm not a brand loyalist (I currently use both  
> Castrol and Mobil), but it's funny to read someone recommend Castrol  
> and berate Mobil 1 as not "full synthetic." More than ten years ago,  
> Castrol took some conventional stock, heavily modified it  
> (hydroisomerized), and called it synthetic. Mobil sued for false  
> marketing, and the case made it all the way to the SCOTUS, which  
> decided that these Group III oils are sufficiently modified and  
> perform well enough to be considered "synthetic." AFAIK, group III  
> oils can't be labeled "synthetic" outside of North America.
>
> Mobil held out with a pure PAO (group IV) base for a while, but even  
> they mix in some group III these days. It's rumored that they still  
> have more PAO than most other major "full synthetics." The kicker is  
> that the group III/IV mixture actually has some benefits over  
> strictly PAO due to better compatibility with additives and such.  
> Today's "synthetic" oils are so good that group III/IV content  
> shouldn't really be a deciding factor in your choice. Get the weight  
> right, change it regularly, and save your worries for something else.
>
> Eric R.
> '86 urq
> '92 urS
> '93 urS