Toyota has had problems with sludge build-up recently, too.
I don't know if it was called a "recall" or not, but they had to replace engines or do rebuilds that were waaay out of the warranty period.
2001 E430, Bourdeaux Red, Oyster interior.
1973 280SE 4.5, 170,000 miles. 568 Signal Red, Black MB Tex. "The Red Baron".