Mobil 1 oil weight

[Taka Mizutani]

No, Mobil 1 is not PAO based. You're about a year old on your info if you're
showing that. That was the big news on bobistheoilguy forum last year.

Pennzoil Platinum's original formulation was group V, never was group IV,
now is group III, which is the same crap they call "synthetic" that is the
basis of current Mobil 1, Castrol Syntec (exc. German Castrol 10W30) and
pretty much all others save Redline and some other esoteric oils.

I don't know what this GF rating you're talking about.

Splitting hairs, I know, but I'm not spending $4-5 per qt. for "fake
synthetic" oil- at that point, I might as well use whatever's cheapest.
That's why I have a small stockpile of "real synthetic" oil that I use for
the turbo engines. Once that runs out, the STi is getting Redline 10W30.

Taka


On 4/30/07, Ameer Antar <antar at comcast.net> wrote:
>
> I did some reading and it looks like Mobil 1 and Penzoil both are GF4
> rated
> (and PAO-based). I've had trouble finding anything with GF5.
> Unfortunately,
> none of the manufacturers give the rating on 40 or 50 weight oils, so
> they're
> probably not GF4. I've had no trouble with 10w30: no clatter, no leaks,
> but
> then this is a rebuilt engine. I think I might stick with it since the 40
> weight is not as highly rated.
>
> I just took another look at the oil grade chart on SJM's site and noticed
> that
> the chart for the '95 S6 looks very similar to the chart for the 5kt/tq.
> What's
> interesting is that the '95 shows a second group for "Energy Conserving
> Oil".
> Here they say it's ok to run just about anything all year round: 5w30 -
> 10w40.
> I think this shows that oil has changed quite a bit over the years. I
> think
> almost all of the oils are Energy Conserving except for the heavier
> weights, so
> with that and the fact that it's fully synthetic, I think 10w30 is
> probably
> fine for the summer. I might switch to 5w30 or even 0w-30 during the
> winter. I
> think the main thing is that the second number, which reflects the
> viscosity at
> temp is correct. The first number just says how easy it is to flow at
> startup,
> which is definitely important for winters here in the NE.
>
> So I think the lesson learned is: 10w30 for warm weather and 5w30 for cold
> as
> long as the oil is EC rated. But if you have noisy lifters or weak seals,
> thicker oils will help.
>
> -Ameer
>
>
> -------------------- Original Message --------------------
> From: Taka Mizutani [t44tqtro at gmail.com]
> To: Steve Marinello [smarinello at entouch.net]
> Cc: Ameer Antar [antar at comcast.net], Quattro List [quattro at audifans.com]
> Date: 4/30/07 7:47:51 AM
> Subject: Re: Mobil 1 oil weight
>
> Same experience here- Mobil 1 15W50 (before they went to the crap Type III
> that they're using now) never burned any oil, no lifter clatter, good oil
> pressure and oil temps. Even subjected to summertime track abuse, the oil
> didn't crap out on me.
>
> I won't use the light stuff in the I-5 cars- I tried Castrol 5W50 in the
> 200,
> LOUD lifter clatter, oil consumption, etc.
>
> Mobil 1 10W30 in the winter months was okay, but I used oil, maybe 1/2 qt.
> every 5k oil change.
>
> I'm currently running Pennzoil Platinum 10W30 (the old Group V stuff) or
> German
> Castrol Syntec 10W30 or my last existing bit of the old Mobil 1 10W30.
>
> I've put Quaker State Q Power full synth in the Miata, because it's
> normally
> aspirated, not high strung and I don't really care- engines are dirt cheap
> for
> a Miata. Still run full synthetic and do 3-5k oil changes even in the
> engine
> that I don't care about.
>
> Taka