Interesting Oil Article from FP

[kevin derhouson]

http://store.forcedperformance.net/merchant2/graphics/subaru_oil/Forced%20Performance%20Recommendations%20for%20Motor%20Oil.pdf

[daniel Dee]

I have experienced several bearing failures in engines before so
I am not surprise at all...

I used Royal Purple 20w-50 in my TSI  but RG put in their 5w-30 and I have been diluting it with more 20w-50 since.
I agreed that 20w-50 is like pancake syrup when it is cold so warm up is required.

For the track 20w-50 or more ,,,,I hate bearing failure.

 

[John Hartman]

you should monitor oil  temps while choosing oil weights for your car.  if the oil never comes up to temp, its also hard on the bearings.  Too thin is bad but so is too thick.

There is an EXCELLENT article in GRM about it.

[Ken Hawkins]

IIIInnnnnteresting....

Over at the Rennlist forums, for years you could start a flame-war over oil recommendations for the 928. It has essentially finally sorted out that Mobil 1 should be verboten for anything other than your grandma's Hyundai...

In the 928 world there is a common failure of one of the con-rod bearings which had been blamed on improper drilling of oil galleys in crank. Others never experienced this problem despite having the same year/engine. Seems that oil brand really does make a difference.

Ken

[Trevor Robinson]

http://www.bobistheoilguy.com/cms/index.php?option=com_content&view=article&id=82&Itemid=1

also ran into this little artical

[Sy Haw Wong]

Interesting article, but the test was conducted on a high performance 500whp+ turbo. 

Would this mean Mobil 1 10W-30 is still shit for stock or mid range (16g/T28) modified cars?  Somehow I don't think so but I maybe wrong.

I use Mobil 1, but if Royal Purple was cheaper, I probably choose that over Mobil 1 ~ But I may actually go for it in my next oil change since I am choosing longer milage to break in the oil before change.  So the little extra maybe worth it.  Dunno.

[John Hartman]

Mobile has been getting a bad rap the last few years.  Not sure if its deserved or not, but I have seen several tests that show its not as good as many other oils.

FWIW I run Royal P in the Talon and Castrol Syntec in the Mazda.

But then some higher end cars reccommend Mobile from the factory.  Hell its right on the oil cap on Vettes and has been for years.

[KevinBuckham]

From what I understand this was written to target the failures of the EVO FP Black and similar turbos (standard bearing) as they were failing quickly for some people due to poor oiling.  I also think this helps explain why so many end up with bearing and oil pump failures.  Now we can add Mobil1 to the list of DSM oiling issues:

- oil trapped in the head (esp. 6 bolt heads)
- pickups sucking air (high G's, oil is all in the head)
- extremely low idle oil pressure in some DSMs
- stuck oil squirters
- oil just isn't providing enough protection for the severe conditions we subject it to (Mobil1 and similar on-road synthetic oils)

In regards to manufacturers still recommending Mobil1, first Mobil1 tends to be a bit thinner than competitors helping fuel economy numbers, and secondly I'll bet the bearing area in any current production car takes into account the lesser properties of the current generation of catalytic converter safe (and fuel efficiency targeted) engine oils.  I don't think there is any volume manufacturer or synthetic oil that would pass muster for a vehicle manufacturer to use (catalytic converter compatibility, fuel economy, consistency, availability, and high volume production) that provides appreciably better protection than Mobil1. 

For us, we can switch to a high zinc and phosphorous combination oil, as we either don't care about cat longevity and/or we care more about engine protection.  I wonder how sludge build up is with these racing oils as they have far less detergent additives.  I have a feeling I would be most happy with a oil a little more street friendly, and replace my oil for track duty.

[Jason Harwood]

I use Motul.

[daniel Dee]

A spun bearing will break your heart and maybe your bank account..
My bearings look like 100,000 KM after just 1 year so I will do anything to protect my motor bearings.
So Bearing load protection is first.

Motor oil was originally design to protect the motor
and high performance engines need the most protection.
So fuel economy,,ease of cold starting...long life ..will come second in my choice of motor oil.

[John Hartman]

Dan, thicker is not always better, again, the oil has to come up to temp.

[Jason Harwood]

Dan, thicker is not always better, again, the oil has to come up to temp.

Correct.

I've never experienced bearing failure as I have always ran the proper oils designed for my automobile.