WEll, the other family car here is a '97 Honda CRV SUV. Is that an "older engine" that would benefit from using the 15W40 for diesels, like Delo or Delvac?

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1983 300D, the "Avocado"
1976 240D, 4-spd the "Pumpkin", SOLD to Pierre
1984 190D, 2.2L, 5-spd, my intro to MBZ diesels, crashed into in 2002