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First, I don't own a diesel powered CRV. I do own a diesel powered Chevrolet truck.

Reading through this there are some comments that could mislead readers. Viscosity (5w-40) is only part of the issue in selecting oil. With diesels you need to verify the API service "Performance Level" is appropriate for diesel service. You can buy oil that has a proper viscosity but is intended for gasoline engines. other oils are diesel only, and some are both.

Diesel combustion chambers operate at much higher temperatures and thus need oils appropriate for these temperatures.

Diesel ratings are compounded by the usability with the amount of sulfur in the fuel. This becomes an issue if you have a particulate filter (diesel equivalent to a catalytic converter).

Here is a link to a 3 page pamphlet on oils ratings.
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