Blackstone Oil Report: Cause for Concern?

Kgolf31 · 05-11-2012, 04:40 PM

Report shows some extra metal that is usually contributed to rod bearings. My temperatures do rise alittle ONLY when I'm autocrossing. Immediately after the temps fall under 210F again and never get above that during DD. As well, anything that can explain the gas?

Thoughts?

kennyfrc · 05-11-2012, 08:39 PM

Those number are high but not quite to the panic point. The iron has more to do with the amount of time the oil was in use than wear it seems. Lead would be worrisome to me at 9-10PPM on a 4K oil change interval. Your change interval was too long to to jump into swapping bearings. Reduce the interval to 4K and see if wear decreases. I would sample at 2K and 4K followed by a change to see if your wear numbers are trending higher than average then decide what to do.

Also, Google "S54 Oil Analysis" for some interesting reading.

http://www.bobistheoilguy.com/forums...Number=2482388

FWIW, I would panic at or around 15-20PPM of lead on a 4K change interval.

05-11-2012, 04:40 PM	#1
Kgolf31 Brigadier General 460 Rep 4,531 Posts Drives: 2007 Z4MC, 2012 128i Join Date: Sep 2008 Location: Ohio iTrader: (4)	Blackstone Oil Report: Cause for Concern? Report shows some extra metal that is usually contributed to rod bearings. My temperatures do rise alittle ONLY when I'm autocrossing. Immediately after the temps fall under 210F again and never get above that during DD. As well, anything that can explain the gas? Thoughts?
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05-11-2012, 08:39 PM	#2
kennyfrc First Lieutenant 18 Rep 376 Posts Drives: 2008 Z4MC Join Date: Aug 2010 Location: ATL GA iTrader: (1)	Those number are high but not quite to the panic point. The iron has more to do with the amount of time the oil was in use than wear it seems. Lead would be worrisome to me at 9-10PPM on a 4K oil change interval. Your change interval was too long to to jump into swapping bearings. Reduce the interval to 4K and see if wear decreases. I would sample at 2K and 4K followed by a change to see if your wear numbers are trending higher than average then decide what to do. Also, Google "S54 Oil Analysis" for some interesting reading. http://www.bobistheoilguy.com/forums...Number=2482388 FWIW, I would panic at or around 15-20PPM of lead on a 4K change interval. __________________ Toy: 2008 Silver Z4MC 300WHP/241TQ Mods: OEM Euro Headers, RPI Scoop Daily: 2010 Tacoma Double Cab
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