On the Diesel Fiesta you need the 5W-30 Ford Motorcraft oil, or any other good brand of fully synthetic motor oil with the 5W-30 specs.
You need the correct filter for your model of diesel engine Fiesta.
The old 1.8 straight diesel used a metal cannister filter, whilst the later Tdci Duratorq engines have a paper element filter in a plastic housing (looks like a bomb or a fat plastic bottle with a hexagon cap) on the side of the engine block.
You need to be specific as to year or Mk of Fiesta and as to which engine is fitted as they're all different.
Paper element filter in a black plastic housing which looks like a fat bottle with a hexagon head, on the side of the engine block. You need to take off the front section of the air pipe to get at it.
Ford recommend 5w/30 for all their latest petrol and diesel engines.
The Fiesta has undergone many design changes in its many years of production and it has been fitted with a variety of different petrol and diesel engines. All have different oil filters. One petrol variant is reputed to have its oil filter located behind the engine where not even the Ford mechanic can get at it - but that may be an Urban Myth. You need to identify which engine you've got fitted.
a ford 7.3 powerstroke diesel uses 15 quarts of oil with a filter change.
You need a carbon filter for diesel fumes
If the diesel fuel "gels" then yes the filter will need replaced.
You need to be specific as to engine type (diesel or petrol, and then which size or type of diesel or petrol), and also quote year and/or Mk number. All have different sump plugs, oil filters and so on.
You need a Wix Filter # 51365
According to the 2000 Ford F-250 , 7.3 liter diesel supplement : With engine oil filter change : ( 15.0 U.S. quarts )
ATTACHED TO THE ENGINE, THE ENGINE IS THAT NOISY BIT AT THE FRONT. Lift hood and its under there.. good luck In other words - You need to be more specific as to whether it's a petrol engine (and then which particular engine - they're all different) or the 1.4 diesel. All are different!
By loosening the bleed screw on the pump. The filter may also need to be primed, which should be done first.