Quote Originally Posted by Astro14 View Post
Are the deposits from high SAPS? Or the increased calcium? I think I would have to do a very detailed brand/additive comparison before condemning an A3/B4 oil on the basis of SAPS.

I’ll keep you all posted on this, as the XC just rolled over 266,000 miles on the original engine. It’s been drinking about 1 quart (liter) every 1,500-2,000 miles for the last several years. Compression and performance are still good.
I'm coming up on 200K miles Astro and have similar oil consumption to you. I change oil every 5K with Penzoil Platinum or Castrol Euro 5W/30 and the performance seems the same as it did 10 years ago (good). So where does the oil go?