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It is a concerning report. I would definitely do a couple more flushes and retest. What did you observe when you did the bottom end, and importantly, why did you need to do it? I would think readings like this indicate thrust bearing failure in progress.
As a small plane pilot and we get oil analysis every 50 hrs the first and second check after overhaul usually has higher levels of metal. would recheck after a few hundred miles.
What others have said. Those are high metal numbers in quite a few categories. I assume you've now changed that oil when you sent the sample. If you still have the filter (hope you do), you need to cut that open and look to see if there's anything in it.
I would run 500 miles, change it again and send in another sample. If metals are high in that next sample tok after only 500 miles, I think you have a problem.
I like those high Zinc and Phosphorous numbers from your oil, but it would be better to use an oil that also has high Moly in it, which is an anti-wear additive. The best oil I've found with high Zinc, Phosphorous, and Moly is Driven DT50, which is a 15/50 and what I run in my 928s. Their GP1 is also good if you want a non-synthetic oil.
Here's a series where I used BR40 break in oil for 100 miles after putting a different engine in the car, then 2 rounds of the GP1. Was solving a fuel distributor issue at the time and why the fuel dilution was slightly high. This is from a suoerchsrged 79 with an 83 4.7L in it.
Thanks for all the responses. I too thought the metals were high. I did as a precautionary for some cylinders were low in compression 1, 4 and 7 were setting around 92, 85 and 85 respectively End play on the flex plate was .05 so not that bad. But decided to get rebuilt. Had 928 Motorsports do the job. Did the NIKASIL plating on cylinders, new forged pistons with all new rings, polished crank, new main bearings, rod bearings and polished the water pump area. $$$$$ Use for this vehicle is only driving enjoyment.
I had used the AMSOIL break in oil that is specific for this application. I have not run this up over 5000 RPM yet due this process that has been done. Also had a local machine shop port and polish my heads and also deck them.
I did the flex plate procedure last weekend no problem there. I had put in the Constantine Super Clamp due to a problem I had with another engine fail many years ago.
Hope this is just break in metals and not another failure.
Thanks for the input that you all have reported. Will test next batch of oil after running for another 1000 miles.
... Did the NIKASIL plating on cylinders, new forged pistons with all new rings, polished crank, new main bearings, rod bearings and polished the water pump area ...
OK, that explains the nickel but not in a good way, nor why that (and the iron and aluminum) wound up in the oil.
I agree on change-drive-retest, but I would also want to have a look inside with a borescope.
How many times was the oil changed during the break-in and at what intervals? My concern would greatly deviate depending on your answer. Also, how long is it taking from a cold start to run your engine up to operating temp?
Thanks for all the responses. I too thought the metals were high. I did as a precautionary for some cylinders were low in compression 1, 4 and 7 were setting around 92, 85 and 85 respectively
That's not good at all...
Your compression numbers should be 180+ psi on an S4.
How many times was the oil changed during the break-in and at what intervals? My concern would greatly deviate depending on your answer. Also, how long is it taking from a cold start to run your engine up to operating temp?
I ran the break in oil for 200 miles then put in the Valvoline VR1 20-50 and ran for 1000 miles as per instructions from builder. Just made the change about 2 weeks ago and have about 100 miles on used the same oil. Supposed to run for about 5000 miles per their instructions think I will do it sooner. It heats up to operating temp in about 7 minutes of driving.
Your compression numbers should be 180+ psi on an S4.
Sorry it looks like the way I wrote that I was talking about the current engine but that was the previous numbers and was a big deciding factor on why I did the rebuild. I have not done a compression test on new rebuild yet. Looking do that after some break in time. It pulls very nicely and have noticed any lag when getting on it a bit.
I ran the break in oil for 200 miles then put in the Valvoline VR1 20-50 and ran for 1000 miles as per instructions from builder. Just made the change about 2 weeks ago and have about 100 miles on used the same oil. Supposed to run for about 5000 miles per their instructions think I will do it sooner. It heats up to operating temp in about 7 minutes of driving.
It's coming to operating temp normally, so that's good. If the oil analysis is on the first oil change (second fill), then I wouldn't be concerned at this point in time.
08-12-2021, 07:17 PM
Thoughts on this Oil Analyses
