Does a DPF make my engine consume more fuel?

An Active DPF system can increase fuel consumption over older non DPF equipped engines because they use additional fuel to stimulate higher exhaust temperatures post combustion. The fuel penalty with this type of system can be as high as 5% of fuel consumption. As well, as a DPF becomes loaded with soot/PM and ash, exhaust flow is restricted reducing engine power and performance and increasing fuel consumption.