Since you already performed the common oil consumption fixes with no external oil leaks the only options you pretty much have are trying to do an engine flush to try and clean the rings or swap/rebuild the engine. The injectors were probably coated with carbon because of the oil burning which probably caused the EPC code. "Scientia potentia est".
Usually a faulty fuel pressure regulator will produce a few symptoms that will alert the driver of a potential issue. 1. Misfires and a decrease in power, acceleration, and fuel efficiency. One of the first symptoms of a possible issue with the fuel pressure regulator is engine performance issues. If the vehicle’s fuel pressure regulatorThanks to a finer focus on fuel efficiency — a strength the five-pot did not possess — the base 2.5-litre is now gone. Instead, we have a new 1.8-litre turbocharged four-cylinder engine, dubbed 1.8T or 1.8 TSI, delivering the same amount of horsepower, more torque, and better fuel economy than the outgoing 2.5 five-cylinder.
The new 2013 Corolla delivers lower emissions and class-leading fuel economy across the entire engine range, offering customers attractive cost-of-ownership benefits. The line-up features a choice of a 1.4 litre D-4D turbodiesel and four petrol engines a 1.33 litre Dual VVT-i unit, a 1.6 litre engine available with Dual VVT-i and Valvematic
Fuel Consumption - Economy - Combined: 33 MPG 7.1 L/100 km 40 MPG UK: Fuel Consumption - Economy - Open road: 42 MPG 5.6 L/100 km 50 MPG UK: Fuel Consumption - Economy - City: 25 MPG 9.5 L/100 km 30 MPG UK: Range : 569 miles / 915 km: Fuel Tank Capacity : 17.2 gallons 65 L 14.3 UK gallons: CO2 emissions : 164 g/km (Audi) Emission standard : Euro V The Golf is suppose to average 7.4l per 100Ks. Can't compare a diesel to a petrol car, Average rating is a mix between town and highway driving and it also depends on how hard you push the car and how often you sit in traffic, a bigger capacity car will use less fuel if you drive it at 120km/h then a 1.4i at the same speed. Alex. lA0AJ.