[s-cars] Castrol GTX High Mileage Oil - the real issue is not "seals"

[Taka Mizutani]

That's a good one. I've never heard that before.
Ego? That's the pot calling the kettle black.
On Dec 17, 2013 3:18 PM, "Stott Hare" <stott at gwi.net> wrote:

> Taka,
>
> You act like a Jersey housewife trying to provoke a catfight.  Apparently
> you perceive yourself behind in some score and felt the need to call Scott
> out on some random thread.  Don't be so surprised or let your ego swell too
> much just because he answered.
>
> -S
>
> -----Original Message-----
> From: s-car-list-bounces at audifans.com
> [mailto:s-car-list-bounces at audifans.com] On Behalf Of Taka Mizutani
> Sent: Tuesday, December 17, 2013 1:07 PM
> To: Scott Justusson
> Cc: s-car-list at audifans.com
> Subject: Re: [s-cars] Castrol GTX High Mileage Oil - the real issue is not
> "seals"
>
> Scott- is Castrol GTX HM formulated for higher ZDDP? The current S* spec
> oil
> mandates lower ZDDP levels, so you won't find a conforming oil with high
> ZDDP levels.
>
> I'm glad that you find it so important to comment every time I put anything
> on the list.
>
>
> On Tue, Dec 17, 2013 at 1:11 AM, Scott Justusson <qshipq at aol.com> wrote:
>
> > Sigh, here we go again....  This has nothing to do with seals,
> > swelling or
> > (OMG) the switch from synthetic to dino oil.  This is an educated
> > mechanic legitimate concern about M1 products reducing the levels of
> > Zinc and Phosporus to comply with the lower EGR/catalyst effects of
> > wear additives, driven by the EPA>Car Manufacturers.  One might argue
> > that, esp on cold start, an engine at 245k would benefit from extra
> > ZDDP(dino)/ZDTP(synth) Zinc and Phosphorus.  Previous levels were in
> > the 1100-1300 range, the new standard is sub 800.  M1 Claims this change
> is safe for new and 'old'
> > vehicles, but I think that is plain marketing BS.
> >
> > The best compromise to the OP IMO, is to switch to M1 Turbo Diesel
> > Truck Oil or a Delvac Synthetic, as both retain much higher levels of
> > cold start/worn engine tolerance, wear barriers.  Short of that, a
> > change to a Castrol dino product will yield the same results.
> >
> > As a rule I don't enjoy engine oil discussions, but dragged in by a
> > point-by, happy to back up the educated mechanic recommendation and
> > concern, than anyone focused on 'swelling seals' totally missing the
> > legitimate issue.
> >
> > BTW those in select states might just find that M1 Turbo Diesel Truck
> > oil by the gallon at Autozone, is less than Wallyworld brand dino oil.
> >  BtstockeduponT
> >
> > Taka, you just try to hard, it's the Holidays, and it would appear Mr
> > Rodrigez educated mechanic is just looking out for a good customer.
> >
> > Cheers
> >
> > S "Taka point-by again" J
> > 95.5 S6 M1 Turbo Diesel Truck OIl
> >
> >
> >
> >
> > -----Original Message-----
> > From: Taka Mizutani <t44tqtro at gmail.com>
> > To: s-car-list <s-car-list at audifans.com>
> > Sent: Mon, Dec 16, 2013 2:50 pm
> > Subject: Re: [s-cars] Castrol GTX High Mileage Oil
> >
> >
> > I would not do that myself- going from full synthetic to a
> > conventional oil with seal swellers doesn't really make sense to me,
> > especially if you've had no issues with running synthetic. The
> > synthetic will last longer and be more resistant to viscosity
> > breakdown, often has a lower pour point and a higher flash point.
> >
> > However, you should ask Scott because I am not qualified to answer any
> > questions about cars at all.
> >
> >
> > On Mon, Dec 16, 2013 at 2:56 PM, Thomas Rodriguez <trodri69 at gmail.com
> > >wrote:
> >
> > > My '95 S6 has 245K miles.  Head was rebuilt about 40K miles ago but
> > > otherwise the engine is original. I've been using Mobil 1 5W/30
> > > synthetic motor oil for as long as I can remember. Engine runs
> > > strong. I add about
> > a
> > > quart between scheduled oil and filter changes every 3K miles.
> > > Otherwise there are no signs of burning or leaking oil.
> > >
> > > Last week my mechanic recommended we switch to Castrol GTX High
> > > Mileage 5W/30. I agreed and have driven about 300 miles with this
> > > oil in the engine.  I understand that this oil is not synthetic.
> > >
> > > Any thoughts about using the Castrol GTX HM oil?
> > >
> > > Tom
> > > '95 S6
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