zeroptzero

Although they list upper limits, a typical oil change interval UOA will show lead in the range of 1-2 ppm, so 139 is in the stratosphere, all wear metals are showing much higher than typical averages even if below the upper limits.

zeroptzero

No easy way to check main bearings, even with the engine out I gave up checking mine , but I had so much metal in the bottom of my pan it wasn't even worth checking any further. An oil pressure test is easy to do and worth checking along with the rod bearing check in terms of easy tasks.

Chuck S

Curious what Blackstone wrote in their comments and what it was the last couple of tests. Hence my request to see your report.

Blackstone universal average for lead in the S000 is 1ppm which my first analysis 5 years ago showed. Last 5 years it has been zero (0) with all the other metals well below averages. But we don't know your other metals nor their history. This is simply one sample.

-- Chuck

James187

Chuck S

Thanks for the information. Don't see any historical data, is this the first analysis?

Many metals are over the Universal Averages of S2000s tested here in the US by Blackstone Labs. Not sure your engine oil other than it's SAE 40. Even multi-grade is too thick at start up. Not sure the validity of testing viscosity at 40°C (104°F), the important temperature is 100°C (engine operating temperature).

Your excessive metals vs Blackstone (US) universal averages are attached (below).

Don't know if any of these are alarming but there are a lot of them well over average.

If you've only tested and not changed the oil I'd change the oil and filter and pull another sample in 500-1000 miles. No need to dump the oil you can draw it out the dipstick hole if you're careful not to grab all the sludge off the bottom.

-- Chuck

slalom44

Your silicon values are high as well. That might be the cause of your bearing wear. It might be a bad air filter or leaks in your intake manifold. If you have an aftermarket air filter consider going back to OEM. Also, let us know your flashpoint and fuel dilution levels. If you have lots of fuel dilution that could contribute to bearing wear.

With crazy high lead levels that you have, you probably have increased oil consumption as well. I agree that you need to check your oil pressure, especially at idle with a warm engine. If you see any oil light flickering at idle it's immediately time for new bearings.

zeroptzero

^ I also noticed the high silicon value, it could be dirt, sometimes it comes from other sources too. James187 what intake are you running on your S2000 ? Any known intake leaks around the intake system or the valvecover ?

ThreeD

Got it. I was planning on doing rod bearings pre-emptively around 100K. Sounds like if I wanted to check the mains @ same time it would be engine out instead of just dropping the pan.

starchland

Big ends can be done in the car but can get quite awkward when measuring. For the mains you would need to have the crank removed and that entails taking off the trans. If you do find low oil pressure and in fact is bearing wear then you caught this early and hopefully you can save what’s left of your motor

zeroptzero

^ checking the oil pan for any chunks of metal would be good to know, draining oil doesn't reveal metal pieces as they stay in the pan surprisingly.