Quote:
Originally Posted by v50inred
If Volvo are happy to run an oil with saps of 1.12 in a Dpf equipped vehicle then that is their opinion and if the car is under warranty they will potentially be fixing any issues.
My position is to go for a lower saps, 0.8 is as low as a quality C3 oil, but I believe you can't have a C3 oil with reduced HTHS hence why Mobil Super is not a C3 oil.
Both oils will certainly be perfectly acceptable for the engine.
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Happened to come across this thread while looking for something else and at the risk of setting the debate off again, some engineers think that you should use a higher SAPS oil to protect the cylinder head, even at the cost of a shorter DPF life, because it's cheaper to replace a DPF than a cylinder head. So I guess Volvo are in the protect the head camp.
For My 2003 D5 without a DPF, Volvo recommend 5W-40 oil A4/B4 spec. This has a higher SAPS than the new recommended oil for the latest D5 engines with a DPF. 0W-30 A5/B5 spec. The viscosity is external air temperature range related so I'm not sure why there is so much controversy about the viscosity. The additive package spec is a different kettle of fish though and you ignore that at your own risk.