awilli6

Hey guys,

please take ale a look at this report and give advise on the health of my engine. I was running Mobile 1 - 15W50 for this oil change. I have since found the Royal Purple 20W50. The crank end play is within tolerance. The PO installed a super clamp & Bearings so this shouldn’t be a problem in the future.

awilli6

A little clearer

awilli6

Engine has 165K on the clock

jpitman2

Silicon, lead and copper are a bit elevated. Si usually means there is either dust, sand etc getting past the air cleaner, OR some silicon sealant fragments have got into the oil. I have had much higher lead levels in mine (car did 10 years in Saudi, where there was no lead free fuel), with no apparent ill effects, apart from a bit of slap type noises when cold.
Do another test after an oil change, and several 1000 miles, and see how its trending. How many miles were on that oil?
jp 83 Euro S AT 57k

awilli6

only about 3500 miles on that oil

IcemanG17

the lead and copper are VERY concerning. lead means bearing wear, copper means its through the bearing into the backing of the bearing.....be VERY afraid. Example, my old race 928 never showed higher than 15 lead.....last test before it through a 2-6 rod bearing was only 7....then busted rod, blown motor

Silicon is probably bad air cleaner or old make-a-gasket

islaTurbine

Or the silicon means the Lokasil-lined cylinders in your Porsche 986/996/987/997 are wearing away and you’ll soon be dealing with a scored bore(s).

Joking aside, I agree that a single oil analysis is somewhat meaningless. You really have to get two or three under your belt for that engine in order to get a baseline for its health and where it’s possibly headed.

Every engine is different and has lived a different life so it’s not fair to compare it to other engines of the same model unless some of your readings are just way off the charts. Do another oil change and analysis within the next 6 to 12 months and see what the data shows.


Edit: I agree that your values are elevated and concerning. But you still need more trend data to compare them to IMHO. Or just preserve what engine components you have now and start a rebuild.

jcorenman

The good news is that iron and aluminum are normal. Bearings are layers of lead, then copper, then steel... The concern is copper, 51 is quite high. Levels of 5 to 10 is typical in my experience. And lead is typically in the 3-6 range (1 ppm per 1000 miles driven seems to be typical), so a bit high. Backstone's "universal averages" in the last column are specific to the 5.0L 928 engine type, so those are valid comparisons.

Did you cut open the filter? That is certainly worth doing if you still have it. The "dirty" side is the outside. Cut the filter media loose around the top and bottom, stretch it out in the sunshine and see if there is anything to see.

And what was the crankshaft end-play? I assume it was checked with the clamp loose, hard to get a valid reading otherwise.