ivangene

sooooo you are saying use the WD-40 ..... right ?

LVDell

I agree with you right up until the point about getting "off their lazy asses". Some people do NOT have the technical ability nor understanding to get to those answers. For this reason, it helps to have experts that have got off their asses to research this stuff and help the community out.

As far as the 15W-50, sure it's great, but not in the winter months. If you live in a climate that doesn't have cold winters then fine but if you have a winter, then the 15W-50 needs to be changed.

I am moving from the 0W-40 Mobil1 to the 5W-40 Amsoil for my car.

In the end though, if people just understand that changing their oil FREQUENTLY can help avoid a lot of the crap that can happen to these (and other) motors over time. Maintenance, Maintenance, Maintenance, there is no substitute.

ivangene

has anyone ever been told to run a synthetic oil LONGER so it can do its job... and that most people change it out TOO fast??

I dont want to say where, but a shop I trust(ed) told me that?

LVDell

Not at the 15 and 20K intervals being rec'd these days!

Ed, so the "trusted" shop thinks that oil doesn't work when it's new? Maybe we should be buying slightly used oil?

1999Porsche911

Unless you do the research yourself, what "proof" would convince you? I could tell you that I have a PHD is Fluid Mechanics and then you would want proof of that. I could tell you I have 30+ years in pratical application with NASA and you would want prrof of that. I could provide you with pictures of my degrees, whether real or otherwise and would you accept that? I could provide you with the awards I received from NASA, real or otherwise and would that be acceptable?

OR....I could just be some bum hanging out on the internet rasing doubts about the erroneous beliefs of motor oil properties and maybe raise some doubts in your mind. Enough doubts where you feel compelled to find the truth about it yourself.




People's qualifications, as described on sites like this should be suspect and common sense and individual investigation and reaseach should be done to verify statements made. You're a statitician. Any suspicions in someone's statement that he has, on average, 4 -5 cars in his shop daily for IMS replacement?

LVDell

Damnit, I'm going back to Canola Oil!

ivangene

Good point Dell, and fwiw I have not let them touch my car since - though I still stop in, say hi and lookk at cars being worked on for info gathering

Charlie C

Dell, Is Amsoil 5W-40 on the Porsche list? If so, is the updated list available online? I searched Porsche's web site but could not find it.

LVDell

It's not on the Porsche "list" I don't think, but the weights are.

You can see the Amsol formulations it on the Amsoil website. The have standard motor oil and racing applications. Probably use their 5W-40 LINK in the cooler months and their 15W-50 LINK in the warmer months.

Remember, the Porsche list is the "recommended" oils.

RallyJon

Exactly. That's my big problem with most oil discussions--so many of the people here are in always warm climates, or never drive their car in the winter. Nice to hear from those folks, but their opinions are pretty worthless to me in my situation.

If Jake says "listen to your engine" I can tell you that it won't be saying anything pleasant when I start it in the work parking lot on a cold winter evening if it's filled with 15W50.

The issue isn't whether 0W40 or 5W40 is evil. A single digit before the W is a necessity around here. It's which 0W40 and 5W40 are good, solid oils that haven't sold out to emissions and cost cutting requirements, have quality basestocks that don't need viscosity extenders, and have the anti-wear additives that Porsches need. Not too hard a question, eh?

Jake Raby

As a Vendor, being forward with information is a really big challenge when you are countering what Porsche dictates.. Its a tough place to be in, and I really dislike it.

I learned long ago that 10% of the readers of a post/ thread will argue about anything and will "parrot" whats stated in advertisements as gospel, even if they have absolutely zero direct experience... Most of those I have argued with in the past don't even change their own engine oil, but they are experts.

Maybe one day I'll come up with a directive concerning oils and sell it as a reference.. At least if people are going to cause trouble I'll make something off the BS that comes with it.. And it won't be quite so easy for them to copy/ paste statements into threads on forums that start WWIII.

As we learn more and more about the engine and find things that defy conventional wisdom its going to be difficult to share the data without ending up creating conflicts that pull me away from the lab.

1999Porsche911

It gets a hell of lot colder here in Chicago than SE Penn and I use 15W50 all year round. Synthetics are alot different than conventional oils. The pour rate of 15W50 is - 38F which is only about 10F higher than 5W30.

RallyJon

Fascinating. The pour point of Motul 300V 5W40 is -33°F--actually higher that the 15w50 that you're talking about. The pour point of the remarkable (until recent reformulations) Mobil1 Truck & SUV 5W40 is -49°F.

How do you suppose that happened? Something more to it maybe? Extra variables? Stats don't tell the whole story? Hmmm.

1999Porsche911

Shhhhhhhhhhhhhhhhhhhh! These are things that the marketing department don't want you to talk about.

RallyJon

Exactly. So, since synthetics that use viscosity extenders use them to bulk up the high end:

a) what sort of pisswater do you suppose they start with to get those low flow numbers?

b) what sort of witch's brew do they have to add to said pisswater to get it to resemble a 50 weight oil for a minute or two until the additives burn off?

c) if they do that to 15W50, does the 0W40 go right from the kitchen faucet to the bottle, or what?

Can't trust a f'ing thing anymore...