Hey guys,

Thought someone might be interested in the status of JWS3309 automatic transmission oil with 10 years and 153000 miles on it from a 2008 R56 Cooper S.

Metals were high but the oil hadn't deteriorated. Compliments of Blackstone Labs:

 

That's a pretty interesting result: thanks for posting that. How did the oil look visually coming out?

 

It was very very dark red/purple like a very dark red wine with a little bit of brown too. I didn't even intend to change the fluid yet but I was doing an engine swap, and the tranny tipped over in my truck's bed and a couple of liters spilled out. So I drained a sample's worth and added two new liters. After I get the engine running, I'll drain and fill two more times

Anyway the tranny was shifting fine. The oil was still viable but full of wear metals. I had never serviced it.

The lab said they only have a few samples from our transmission in their database so those universal averages, while specific to our transmission, aren't from a robust database.

Per Blackstone labs "The averages are based on samples we've seen from the Aisin 6-speed, but there's not a whole lot of them, and most of the intervals were much shorter than yours. I looked through other reports and there were a few with metals about half as high as yours after going about half as far on the oil"

This drip appears to be the only picture I have.

 

Thanks! Hope it goes back together and all is good!