Charles Navarro

Between the Rotella and Delo, stick to the Delo, as they are going to continue offering a CI-4 version, which is way better than the reformulated CJ-4 diesel oils for the 2007 and later vehicles with particulate emission filters. Valvoline Blue from what I can tell also hasn't been reformulated, last I saw at Autozone today.

htron435

What oil would you recommend for a 91 964 3.6? I've been running Mobil 1 15/50, and the car sees a lot of track mileage.

bgiere

Charles, the VOA on Rotella CJ-4 looked very close to the CI-4 formula...Is there something I am missing? Thank's for all the research you've done...Great job.