Originally Posted by willrev

I switched to the Castrol Tection Extra about 4 oil changes ago. Car burns much less oil than on the Rotella.

It is not synthetic, but says extended change intervals are ok. I still change mine every 3000miles. I also put in a quart of Lucas Oil Stabilizer. The combo works great.

My mechanic has a diesel roll back he uses for towing and strictly uses the Castrol Tection 15W-40. He swears by the stuff.

Anyone had a Blackstone analysis done on the Castrol Tection???