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Correct Engine Oil for Ford Diesel (SMax 2.2 TDCI) engine

MurrayC
MurrayC
in Ford S-Max Club

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Has anyone gone down the rabbit hole of what is the correct oil for their engine? Have have the 2.2 TDCi but I believe the Ford spec is the same for all diesels built between 2010 and 2011>

Ford spec: WSS-M2C913-C

The manual also states:
Topping up the oil: If you are unable to find an oil that meets the specification defined by WSS-M2C913-C, you must use SAE 5W-30 that meets the specification defined by ACEA A5/B5.

My 2011 SMax has both a DPF and a Catalytic Converter and quickly googling the ACEA specs shows that cars with these should use the low-SAPS spec ACEA C# oils. The ACEA A5/B5 oils have better wear protection properties though.

I was just going to buy the AECA A5/B5 oil as normal but now I've freaked myself out by researching it. Does anyone know more about this and why it's ok to use the A5/B5 oils with the DPF and Catalytic Converter?

  • Quote


    To freak you out even more, Ford change these specs after the cars are sold. Often the handbook specs become incorrect after a few years. I suspect the correct spec is now WSS-M2C913-D instead.

    But tbh it doesn't really matter on this engine as there is no wetbelt. Low SAPS oils produce less ash for the DPF when burnt. But the engine shouldn't be burning much oil anyway. I've never seen someone fill up a DPF quickly using Ford spec oil so far.

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