Morning I'm looking at getting a new 2018 Mazda 3 2.0L diesel, are there any problems with this engine ??

I currently have a 2010 Mazda 3 with the 2.2L diesel engine and every time if goes in for a service its always got
more oil in than last year, which I'm told is due to the fuel used to clean the dpf valve getting pumped in to the sump
which for me is altering with the viscosity of the oil

thanks