but if found the big bottles of Mobil one at Walmart cheap!!

 

Too light, find some 5 w 50 M1 online.

 

Is OK if you change the oil every 1000 miles.

 

Not sure what you own, but if it's a P-Car why would you go cheap? I mean really is $1-$2 per quart going to break your bank?

Oil is the life blood of any high performance automobile.

 

$10-$20 more for race fuel

 

I own a turbo, have used may oils over the last 25 years and never had an issue. I change my oil, oil filter and and air filter every 2000 miles. At that interval, most oil weights will do. I also live in a climent that is never colder than 40 and hotter than 90.

 

There's an extensive thread about oil brand and weight, Kevin chimed in a couple times and recommends the M1 5 w 50 I mentioned earlier. If Kevin uses it...

At the very least, make sure the oil is porsche approved. I don't believe 0 w 30 is on the approved oils list.

I wouldn't do it- but it's not my money if you have an issue with your motor...

 

I run 5 40W but have seen race engines use 0 30W. I was told that the engine will rev faster with the lighter oils.

 

Definitely true. A race motor just needs to last until the end of the race.

 

Here are some articles on motor oil that may interest you guys...

http://www.supramania.com/aehaas/

 

This is an interesting site.

I read Oil 101 by A E Haas and, well, was underwhelmed. I didn't read the remaining lessons.

In Dr Haas biography he says, at the end of Oil 101:

"About the author:
Dr. Haas is a physician and surgeon. He graduated from the University of Florida with a degree in biochemistry with honors. He studied motor oils since high school where he did independent studies on this topic. He studied the properties of viscosity.

And

"I will try to minimize technical terms and be somewhat vague rather than exact. I will round and average numbers to make the point simple rather than mathematically exact. Thickness has the same meaning as viscosity. Viscosity is a measure of the resistance of a fluid (liquid or gas) to flow."

In science and engineering it is imperative to be exact. Vague is a useless concept unless you need to defend erroneous notions against factual information.

Even if he is partially correct there have to better sites discussing oils; it might be advisable to search for those sites.

And use Porsce recommended oils.

As an aside, can you can get a license to practice medicine in Florida with a degree in biochemistry?

 

But exactness to the point of distraction is of no use!

Shall we develop quantum equations to determine the interaction of each molecule as it courses through an engine in order to achieve the "exact" understanding?

At what level does YOUR ability to comprehend drop off? Indeed at what level does precision and exactness have no benefit?

Everyone has a different interest and different level of understanding... I found the Haas article to be a good "101" level discussion for people without any science/math/tribology background. Those with more intense needs and capabilities can look elsewhere.

I did find the bio to be tedious, but the writings of some use.

A


PS the more one reads about tribilogy and oils, the more one begins to understand (or should) that we (car forum posters) are generally pretty ignorant. Anyone having a discussion about oil usage and recommendations without UOAs to reference is pissing in the wind...IMHO

 

A basic fact is that lighter oils will break down faster but still offer protection. If you use lighter oils, just replace it more often.

 

True to a point.. but there is a point at which an oil no matter how "fresh" will just be too thin for the application. Period.

Is it 40? 30? 28? 35?

Nobody I've seen on here has the knowledge to say what the minimum 100C viscosity is for our motors. Lots of 'stories' and anecdotes...

 

Yes, but our cars will not see that point driving on the street.