Sounds good. From what I have seen in the US, ALL of the 5W-40 oils have a fairly high diesel rating (CI-4 or better). Other than the 15W-40 oils, with very few exceptions, most other weights have only a CD diesel rating or none at all.

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Ron Schroeder
'85 300 Turbo Diesel 2 tank WVO
'83 300 Turbo Diesel 2 tank WVO
Some former WVO vehicles since ~1980:
'83 Mercedes 240D
'80 Audi 4000D
'83 ISUZU Pup
'70 SAAB 99 with Kubota diesel
'76 Honda Civic with Kubota diesel
'86 Golf
Several diesel generators
All with 2 tank WVO conversion
LI NY