Five Years, Five Oil Change Reports from Blackstone

[Flavor 987S]

Chuck, thanks for posting your UOA history. I had very similar numbers to yours, but my oil change interval was more like 6,500 miles. I don't think you'll see major changes to your next UOA with the DT40. It will be the test after that (2nd run on the DT40) that you should see the most impact, once the DT40 gets permeated into the system at a higher % and you "wash out" the Mobil package. Jake has said (Lake, at Gibbs, confirmed) that the Mobil package and the Gibbs package fight each other in the beginning, that's why Jake likes to recommend a flush with the BR40 before the DT40.

I plan on running the DT40 in my new Carrera for a little while and observe the UOA's. I may then stay with it or move to the Mobil 5W50, which has given me great results in the past. Much like Redline 5W40 did.

[Jake Raby]

Originally Posted by Flavor 987S

Jake has said (Lake, at Gibbs, confirmed) that the Mobil package and the Gibbs package fight each other in the beginning, that's why Jake likes to recommend a flush with the BR40 before the DT40.

Exactly. Cross pollination will exist for at least 2 oil services if you do not carry out a changeover flush.

[Benjamin]

Originally Posted by Jake Raby

Exactly. Cross pollination will exist for at least 2 oil services if you do not carry out a changeover flush.

Jake, my car has been run on Mobil 1 up until now and I have just purchased DT40 for an upcoming oil change. If I do a flush with BR40, how long should I run it before changing to the DT40?

[Flavor 987S]

Originally Posted by Benjamin

Jake, my car has been run on Mobil 1 up until now and I have just purchased DT40 for an upcoming oil change. If I do a flush with BR40, how long should I run it before changing to the DT40?

Couple hundred miles.