Ultimate Motor Oil Thread or Why we hate CJ4/SM oils

[Bill Verburg]

Originally Posted by 911 tweaks

Thx bill for your input as always...
Can you share with us what Porsche car(s) you may have,
what engine in car and the oil brand
and weight you are using...
That may answer a lot of q's people may have...
Thx bob

Not that it makes a bit of diffeence
past '72 2.4 used straight 30wt later Castrol 20w/50

current '76 Carrera 3.0 used Castrol 20w-50 for years switched to M1 15/w-50 in the late '80s, put a 964 in it used M1 15w-50, in the quest for more power put a 993 3.8RS in it used M1 15w-50, this engine was too much for the 915 so put a slightly breathed on 993 3.6 which used M1 15w-50
'95 993 original 3.6 used M1 15w-50, now has the 3,8RS in it, track us only, uses M1 15w-50
occasional top ups on all the above w/ BP 20w-50

[911 tweaks]

Thx bill for sharing what you used. .
Top ups means what? Sorry for my not up on lingo...
As for the Mobil one, are you using the "once a yr" oil or the full synthetic?
Thx again...
For what it's wurth, I no longer use brad penn as they significantly reduced
the amount of zddp in their oil about a yr ago so I use joe Gibbs or m1...

[Bill Verburg]

Originally Posted by 911 tweaks

Thx bill for sharing what you used. .
Top ups means what? Sorry for my not up on lingo...
As for the Mobil one, are you using the "once a yr" oil or the full synthetic?
Thx again...
For what it's wurth, I no longer use brad penn as they significantly reduced
the amount of zddp in their oil about a yr ago so I use joe Gibbs or m1...

top ups- a car will occasionally need a gt or so between oil changes, for instance the engine mounted oil filter on the track car has come loose a few times spewing .5qt or so of oil which needs to be replaced, the street car leaks like a sieve so dispers and an occasional qt top up are necessar

yes, both see annual oil/filter changes mileage is always less than 5k.

If I drove more I'd go go annual changes or ~6k filter and oil changes which ever comes first. This is all summer use. winter use and oil short drives are harder on oil so I might change more frequently.

Again I'm not asking any one to do what I do. Do your HW and act accordingly

[HarryD]

Originally Posted by 911 tweaks

... snip ...

For what it's wurth, I no longer use brad penn as they significantly reduced
the amount of zddp in their oil about a yr ago so I use joe Gibbs or m1...

Where did you hear this?

Looking at their 10/2015 PDS, they seem to be where they have always been. https://www.penngrade.com/files/7126-7150-7144-7158-7419_PG1_MultiGrade_HP_Oils.pdf

[911 tweaks]

Two shops that I know of which they have sent out oil and told me such...

[metamusic]

Now I'm scratching my head. Is Brad Penn 20W-50 still a good choice for my 1970 911?

[cnavarro]

The Brad Penn 20w50 is still a good oil, however pricing has gotten a bit out of hand with all the acquisitions and mergers over there :-)

[metamusic]

The Brad Penn is still cheaper than Swepco and I have not been able to discern any major qualitative difference between the two. As far as Delo goes, I think I have a mental block keeping me from putting diesel oil in my 911. So as long as the product is the same, I'll stick with Penn Grade.

[grizzfan]

I've noticed that Brad-Penn 20W50 has gone up $15+ since I last ordered. I've used Amazon in the past as in small town Montana there are no dealers that I'm aware of. Our sponsor sell it but at the single bottle price is prohibitive. So I've decided to run the stuff a little longer than changing annually or at a fixed mile amount. If it's still green it stays in the tank!!!

Tom

[HarryD]

Originally Posted by cnavarro

The Brad Penn 20w50 is still a good oil, however pricing has gotten a bit out of hand with all the acquisitions and mergers over there :-)

Charles:

Thanks for the info. I have had very good luck with the product and when I had to do a top end last year for a damaged cylinder from a back fire, no evidence of any oil related issues.

[HarryD]

Originally Posted by grizzfan

I've noticed that Brad-Penn 20W50 has gone up $15+ since I last ordered. I've used Amazon in the past as in small town Montana there are no dealers that I'm aware of. Our sponsor sell it but at the single bottle price is prohibitive. So I've decided to run the stuff a little longer than changing annually or at a fixed mile amount. If it's still green it stays in the tank!!!

Tom

Hi Tom:

FWIW, The last case I got from Schnell about 6 months ago was $84.

[JDD]

Hi All - I just had a chat with VP tech services at D-A Lubes (they purchased Brad Penn) .
Brad Penn (Penn1) formulations have not changed . Phos and Zinc still at 1400-1500 ppm in
20-50W product. The packaging has changed however.
"PennGrade1 Partial Synthetic High Performance Oil 20W-50 (part#7119)formulation has NOT changed or been altered in any way."
Regards, JD

[Frog76S]

Going to throw more oil on the fire. Not sure if this link has been posted here previously. Interesting read, also recommend as a sleeping aid if your no able to fall asleep.

It's motor oil wear test protection data, check it out.

https://540ratblog.wordpress.com/

[ClickClickBoom]

Originally Posted by grizzfan

I've noticed that Brad-Penn 20W50 has gone up $15+ since I last ordered. I've used Amazon in the past as in small town Montana there are no dealers that I'm aware of. Our sponsor sell it but at the single bottle price is prohibitive. So I've decided to run the stuff a little longer than changing annually or at a fixed mile amount. If it's still green it stays in the tank!!!

Tom

I go with eBay, free shipping mode. Way cheaper than local distributor.

[BER]

Originally Posted by Frog76S

Going to throw more oil on the fire. Not sure if this link has been posted here previously. Interesting read, also recommend as a sleeping aid if your no able to fall asleep.

It's motor oil wear test protection data, check it out.

https://540ratblog.wordpress.com/

I scanned that blog a couple days ago. You are "right on" about the cure for insomnia. I did find some "interesting" results in the section of Engine Wear Protection Results.

Be interesting to hear some other perspectives on the test data results.

[Trackrash]

Originally Posted by BER

I scanned that blog a couple days ago. You are "right on" about the cure for insomnia. I did find some "interesting" results in the section of Engine Wear Protection Results.

Be interesting to hear some other perspectives on the test data results.

A lot of folks have debated this guys "results".

[big911fan]

Based on this guy's background it's hard to debate his qualifications however. He's a practicing mechanical engineer, a member of the SAE, a member of ASME, a drag racer and engine builder, and a patent holder for a jet engine component. He breaks a lot of eggs with his findings. Therefore he has a lot of critics. But what are their professional credentials and background?

Ever wonder why we never see actual quantified wear ratings from oil companies or the SAE test results? It's because the oil companies consider them proprietary and don't want comparisons. At least his are independent comparisons with no marketing biases.

If there's a criticism to be leveled here perhaps it should be that his test methodology and equipment are proprietary and have not been "peer reviewed" as pure science and engineering principles would dictate. There is apparent consensus however that too much ZDDP is harmful. See the comment from Brad Penn on that topic.

[Trackrash]

Found some interesting background info here on testing motor oil.
Motor Oil Testing Methods

[BER]

If there's a criticism to be leveled here perhaps it should be that his test methodology and equipment are proprietary and have not been "peer reviewed" as pure science and engineering principles would dictate. There is apparent consensus however that too much ZDDP is harmful. See the comment from Brad Penn on that topic.

Don't see anyone criticizing the author or his findings. I just find the results "interesting", and as you pointed out motor oil wear ratings are rarely seen published. We can each draw our own conclusions.

[big911fan]

Regarding Amsoil, I hardly find their testing independent and their results were not done at operating temps if that's important. A few years ago Quaker State had an oil challenge to ANY oil company that could prove through independent testing that they had a higher wear ratings than QS for full synthetic 5w30. Nobody took them up on the challenge. See how QS consistently ranks in the wear ratings in the blog. Maybe there's something to his testing.