docmirror

Your local O'rielly will be facing potential fines from the SCAQMD if they get caught and it's on the CA prohibited list. Stuff like $1000 per DAY per infraction. For more info, go to the SCAQMD web page and find the enforcement actions. ZEP recently paid a multi million fine for some kind of washer fluid violation concerning a few thou bottles of washer fluid at Dollar General. No - I'm not kidding.

edited to correct acronym.

docmirror

Penrite is an actual synthetic class IV oil, not to be confused with US versions of 'full synthetic' class III petroleum/paraffinic oils. The US gets to sell dino fluid which has been hydrocracked in a diffuser as 'full synthetic' although it has no esters or PAO elements(maybe a trace).

GlenL

Quite the post from Mr. Buchanan. I'll paraphrase:

Read The Freaking Manual

He lambasts synthetic oil but I like them. Looks like better pressures when really hot and I like the way they clean up. That may not matter if I was a better mechanic but I do find myself opening up engines and working on engines with oil leaks. Engines that have run synthetic oil are beautifully clean inside. Oil that finds its way onto the garage floor or car's undercarriage or my arms cleans right up.

docmirror

As I know from personal costly experience, one can run these weights of oils all the time, and as long as the engine isn't stressed to its limits, the film strength will be suitable to keep metal off of other metal. In my failure, I had good, new 10W-40 dino in the car, and it was right in the middle of the dip stick, and the temp of the running oil was in the high, but not redline zone, and the coolant was high but not in the warning zone.

But - rather than poking along at 2000 RPM with short bursts of 4500, I was driving it like my *** was on fire trying(and succeeding) to gradually catch that 997 turbo in front of me. I was about 1-2 laps from flicking my lights for him to 'move over' when the 2/6 rod journal decided it had had enough and welded themselves together.

I sometimes ask myself, if I had a different weight oil, or a syn oil in the car, would this have happened? I don't know the answer, but I know I had the 'right' oil weight in the car for the time of year, it's just that I put the ultimate stress on it, and that was that. For about 3 laps, it was worth it. But for the past 8 years, I have to say there are -- regrets.

SeanR

That's just it Doc, lots of people say "no problems using whatever it is i'm using" and these same people have never opened up an engine and seen what crappy oil does to bearings and other rotational parts.

But instead of listening to those that have practical knowledge (such as Bruce) they don't want to be wrong so they continue using what makes them feel better.

Example, dude on FB posts the very same question and we get the very same answers as here. One guy goes off about how Mobile 1 should never be used in any engine due to not enough ZDDP. He kept arguing that even the 15w-50 doesn't and I was an idiot for even recommending it. So I just posted up a nice little link blowing his rant away. I was put on ignore after that and everyone had a good laugh at him.

https://mobiloil.com/~/media/amer/us...guide-2016.pdf

docmirror

Yes, I understood, and agree with you. No trouble doesn't mean there's been no failure it means they have not detected any failure although there may be damage occurring. As for Mobil 1, I've seen the damage done, and the lawsuits they've lost, and the people they've killed with their crappy aviation 'synthetic' for piston fleet, and it doesn't matter how much chemistry they put in it, Mobil oil is dead to me.

Further, they were centrally involved in the big lawsuit that got US petro based oils to be considered 'synthetic' against all scientific reason. I know, people LOVE their Mobil 1. Their advertising campaign has been a phenomenal success. But their chemistry on the other hand - is garbage.

mark kibort

i would say, the 10-40 could have been the cause, plus the high temps and the oil's inability to support the viscosity... was this a small oil hole crank or a more moderin one (S4 vs S2?)

yes, i agree . they have a GREAT lable and marketing department.
however, the product is crap and is responsible for many 928 deaths. ive used it and saw the oil pressure light come on. we changed it right out after a track day.
never saw anything close to those pressures again.
i think my track record speaks for itself as well.
Mk

Cosmo Kramer

MK:

What formula of Amsoil do you use? They have several 20w50's.

mark kibort

i use the 15-50 racing oil now.. i think the part number is RD50 called "dominator"
but there is a street oil, ive never used, but it should be very good too. its a 20-50

V2Rocket

I pay absolutely no mind (no concern) to ZDDP in oil.
Or brand.

As long as the bottle says 20W50 and has the API seal on the back...it's good enough.

I have had my 944 since 2005 and most of that ran Pennzoil 20W50 but in the last 5 years or so it's been whatever has been available/on sale in the correct grade.

On Sunday I put 6.5 qts of Walmart-house-brand 20W50 into the car...don't care. It was like $15.00 for all the oil I needed.

No oil pressure problems, and no worn out surfaces (cam lobes in particular) when inspected.

hacker-pschorr

That's great - whatever works for you....

A lifetime involved with the automotive repair industry I've seen the results of using cheap oil in cars that are otherwise well maintained and serviced on regular intervals.

I've also seen 944S/928 cams with pits with no explainable reason based on service records, except possible oil contents.

No offense, but a stock 8V 944 isn't exactly a "barn burner" that I would be concerned about either. Something like a 928GT with already suspect valvetrain with regards to cam wear....that's a different story.

I'm not sure I would be concerned with ZDDP levels with a stock US 16V 928 either, there simply isn't a whole lot of camshaft to lifter pressure compared to other cars with known issues.
But I fail to see the benefit of touting such opinions versus just sticking with an over all recommendation for 928's in general.

When in doubt I listen to the engine builders I know with experience in these engines versus rolling the dice to save $50 a year on motor oil.

Rocinante

...and it looks like they recognize this. On their oil selector page, only the 86+ 928s come up as an option:

http://applications.castrol.com/oils...cturer=porsche

for which they recommend their high mileage 10W30!!!

docmirror

Click down on the left side for different weights. Use the 10W-40, particularly in summer. I guess in winter you could go with lower, but for now, stick with 40.

Also suitable for the 944 which has the same general cam lifter geometry.

curtisr

This reference to Pat Buchanan's attempt at shaming Canada for not assisting with the attack on Iraq is entirely sensitive and respectful, IMHO, as it omitted "Soviet" which was part of the complete title for the True North in the view of the former Assistant to the President for Communications.

Had the author and transplanted Canuckistanian wanted to be truly insulting there would have been references to Canada as:

• Canęda
• Diet America
• America Junior
• a frozen wasteland where all the population crowd the southern border because they want nothing to do with the rest of it
• every year, the tale of the "Great 1812 patriotic war against the imperialist Americans" is told and retold to small children until they cry
• Canędia is exactly like the United States except without all of the entertainment, technology, culture, tolerable climates and guaranteed civil rights, which makes it, understandably so, an extremely boring country to live in
• hated by the Westboro Baptist Church
• Canędians think their beer is better than American beer
• the slight difference in average IQs between the two country's populations are more than negated by Canadia's socialist education system which has ensured that most Canadians can do simple math. Canadians are especially good at doing simple math in order to calculate how much alcohol they are ingesting or how much tax they will pay. Using the metric system facilitates their ability to do basic math, so Canędians can also figure out whether or not they are driving over the speed limit in their rusty 928s or other form of conveyance

Source: https://encyclopediadramatica.se/Soviet_Canuckistan

curtisr

When I read the oil threads I experience the full range of anxiety as outlined below.

And then I remember that I'm not the first owner of the car so I relax and then think: "Hmm, so I can't undo what the POs have done but, wait a minute what if they used the wrong/lousy/synthetic oil?! Arrrrrrrrrrrrrrrrrrrrgh! I'm screwed! (Hurries to garage to change the oil...)