mobile 1 0W40 analysis results 8700 mile OCI, 00 boxster s

[saaber]

Used oil analysis results fyi

72k miles on car, 8700 mile oil change interval. Normal boxster driving, no track use, moderate climate. Used mobile 1 0W40 since new. My next oil analysis will be on redline 5W40.

Saw very few Porsche results on "Bob is the Oil Guy" and most showed iron in 20-29 range (but several were in break in period). I was worried about highish iron levels but looking at the other very limited data it doesn't look unusual.

Does anyone have links to other boxster used oil analysis results? Thanks!



Site to interpret report here fyi http://www.blackstone-labs.com/gasoline_diesel_report_expl.html

[Brucelee]

Doesn't it want to make you run that oil for 20K like Porsche recommends in the newer Boxes?

Just kidding. Thanks and I will be very interested in seeing the Red Line data. My hunch is that the values will be better.

[CJ_Boxster]

I'd be very interested to see the results of Redline as well. Also would be great to see results of Royal Purple too

[brp987]

It's interesting that an engine with silicon liners instead of iron, that the iron would be high and the silicon low.

[John V]

Similar to my oil analysis after a 7.700 mile interval and mostly street driving. Except my iron was only 11ppm. Silicon was 19ppm. My next oil change was at 8k and had elevated levels of wear metals due to a lot of autocrossing, but not to extreme levels.

My new interval is 5,000 miles during autocross season and 8,000 miles otherwise. This is using 0W40 Mobil 1.

15,000 mile oil changes? Yeah right... if you want the motor to wear out in 100,000 miles.

[Paul]

Originally Posted by John V

Similar to my oil analysis after a 7.700 mile interval and mostly street driving. Except my iron was only 11ppm. Silicon was 19ppm. My next oil change was at 8k and had elevated levels of wear metals due to a lot of autocrossing, but not to extreme levels.

My new interval is 5,000 miles during autocross season and 8,000 miles otherwise. This is using 0W40 Mobil 1.

15,000 mile oil changes? Yeah right... if you want the motor to wear out in 100,000 miles.

I've reported this before so I'll give the short version. When Porsche tested the 996 turbo in the US, they drove it 100,000 miles in the LA area on 87 Octane gas and did not change the oil at all, just added it as needed. When the motor was torn down, it was still within new tolerances. This was presented as a tech session at a Porsche Parade.

[saaber]

Originally Posted by brp987

It's interesting that an engine with silicon liners instead of iron, that the iron would be high and the silicon low.

Maybe indicator of valve train wear vs. little wear at bottom end? So far I have heard some comments on other sites that the iron levels are actually low but I would like to hear more on that.

O.k., so how is this for a wild-assed theory (I need a physicist to chime in on this one...)
(1) From what I have heard, silicon levels in the oil basically come down to dirt that is getting in there. There are lots of discussions on the Bob the Oil guy site about the effect of different air cleaners on the amounts of silicon in the sample. For example k and N filters do better as they age resulting in less silicon, etc. etc.
(2) Dirt travels in suspension (air) when there is sufficient velocity to keep it from settling out.
(3) The snorkel on this boxster, if it were in place, provides a small "tunnel" through which lots of air travels at a high velocity
(4) The inlet of the snorkel is very near the outside "grilles" of the car
(5) I have run this car de-snorkeled for a long time

So, is it possible that the lower silicon levels seen in this sample are due to de-snorkling? That is, does desnorkling make it harder for dirt to get to the engine due to lower velocities and/or the fact that the new inlet is around 12" or so farther from the outside air?

Talk about a wild-assed theory...

[Paul]

It is interesting that, if I'm reading the comment correctly, the additive package is still 5 times as high as it needs to be.