Recent content by Scotthew

Originally Posted By: Quattro Pete TBN of 4.2 means there is still plenty of additive left. You can easily do 6K miles. To get the full picture, you also want TAN. When TAN starts exceeding TBN, it's time to change your oil. Very true. As I wasn't paying for this sample, I didn't want to use...

Originally Posted By: Quattro Pete Was it the latest "Made in Belgium" stuff? Your VOA shows lower levels of Calcium, Phosphorus, and Zinc compared to this other VOA, but maybe it's because it's from a different lab? Strangely, your UOA shows higher levels of Calcium and Zinc than your VOA...

Originally Posted By: Quattro Pete Report looks fine to me. I don't think I've ever seen Silicon level of "0" on a UOA. You have suspiciously large number of zeros on this UOA... I was thinking that too. And since the additive package is a bit lower on that sample as well, I suspect the ICP was...

You're a wizard, Pete. Thanks!

I've been using 0W-30 GC since I bought my car 34k mi ago. Unfortunately, I've only been bothering with UOAs for the last year or so. For the most part I've been quite happy with GC, but the most recent test showed a suspiciously high particle count on both the used and virgin samples and the...

I changed my engine oil this weekend, and for the first time I decided to run an analysis on a new/clean sample for my own curiosity and a baseline comparison. I've been running GC since I got my car 34k mi ago. I thought you guys here might be interested in the results. 0W-30 German Castrol...