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Originally Posted By: d00df00d As I understand, ICP is the most accurate method but catches the smallest range of particle sizes, and the particles most relevant to engine wear tend to be bigger than ICP can detect. This would mean that the UOA has the following uses: 1. If one of the numbers...

Originally Posted By: d00df00d Regarding the lab: Try to find out if they use ICP, RDE, or RFS to detect wear metals. That will affect the conclusions that can be drawn. He has told me he uses ICP for this method. How does that affect the interpretation? Thanks Craig

I am VERY interested now. I had a fault code recently for fuel control bank 1-4 and also 5-8. The SES light came on and then went out. It's not been on since, I've had another instance of this bank 1-4 system too lean and the same for 5-8, but then it was quiet for 8 months. I've noticed nothing...

Yeah I have been told with the first UOA it's difficult. The lab said the results were good and he was pleased with it. It's a uk based lab www.theoillab.co.uk The drive it has is 23 miles each way most of the time, so does 40 miles a day. Few short trips but I will say it's on a fast road...

Just like some opinions on these results. The car is predominentally used as a commuter car. I have some consumption but it only seems to happen after a long trip of about 200 miles non-stop. Other than that it can go for 2 months with none at all. I would like to reduce the iron, I have been...

Robert, When I wrote that I wasn't intending to provide his entire argument, I was simply saying that there is one man in particular on the M5 board who is well known as an extremely knowledgable individual when it comes to these cars. He helps a lot of members with all kinds of issues and his...

I saw that thread too and read it.. The problem is you just don't know what do believe do you. I called 3 dealerships today, and they were consistent with their choice of TWS for a 2002 E39 M5. I did stress this and asked them to make absolutely sure that TWS was correct. I asked about 5W-30 and...

Thanks d00df00d, I have some more questions, my driving and temperatures are like this. Stopped in traffic for a while I might get close to 100C (just shy of) for oil temperature, my water temperature will perhaps go up to half way. When driving or cruising down a motorway my oil temperature...

Ok.. so are we saying that there will be not detrimental effects using TWS rather than 5W-30 in a post 2000 E39 M5 engine? I mean these oils must have radically different characteristics surely? If so surely one oil has an advantage over the other? I am a bit confused here, I have also been...

Firstly, I have been trying to search on this forum, I put "BMW" in the advanced search options for subject or content, I set posts in the last 10 years and go 0 responses, and selected all forums for the search. I think something is a miss with the search surely!? Anyone any idea why? Anyway...