General service questions

[granitelad]

Hi , new to the forum today and hopefully the knowledgeable people on here can help and advise. We recently purchased a 2019 3008 Blue HDi GT Line premium, first registered October 2019 with I think what is the DV5RC (YHZ) Engine which has done 22.5K miles. I have 3 questions regarding servicing, 1. What is the correct oil for this engine, some websites state it`s 0/20, or 0/30 or even 5/30. I am not sure which to use. 2. Been hearing about issues regarding wet timing belts degrading and timing chain breaking. Is it a chain or a belt and is it a wet belt on this car ?, and what are the service intervals for changing. 3. I believe there is a Particulate Filter Additive, how often does this need topped up, is it down to mileage? If anyone can help with any of these points it would be very helpful and appreciated. Many thanks in advance.