The Koleos service manual states the diesel Koleos should use 5W30 ACEA C3.
Looking at the Penrite site they now offer ACEA C4 (RN0720 rated). Not that passionate about Penrite but useful as a reference.
Sent an email to Renault FR about what oil SHOULD be used and they responded with the oil should be 5W30 RN0720.
The ELF site says the following:
For 30,000 km covered, an RN0720 standard oil oxidizes 3 times less than an ACEA C4 oil and 6 times less than an ACEA C3 oil
It can be seen that the C4 oils are supposed to produce only 60% of the ash C3 oils emit.
Better for DPF filters.
Why doesn't Renault advocate its use in my service manual? (Probably because it's an even more boutique oil here than C3????)
The oil I am using is Solaris DPF which is C4 (level C3 RN0720 rated).