How often should a Fiesta ST180 be serviced?
Ford’s standard service interval for the MK7 Fiesta is every 12 months or 12,500 miles, whichever comes first.
For tuned Fiesta ST180s, we recommend reducing this to every 12 months or 10,000 miles, whichever comes first.
Cars used regularly on track or driven particularly hard may benefit from even shorter intervals, depending on use.
Which engine oil should I use?
For most standard, Stage 1 and Stage 2 Fiesta ST180s, a good-quality 5W-20 oil meeting Ford specification WSS-M2C948-B is suitable.
For sustained track use or prolonged hard driving, a higher-viscosity oil may be more appropriate. The exact oil should be selected around the vehicle’s specification, condition and intended use rather than chosen purely because it is thicker.
Which spark plugs are best?
For standard and Stage 1 cars, genuine Ford spark plugs are an excellent choice.
For Stage 2 cars, genuine Ford plugs remain suitable, although NGK one-step-colder plugs may be preferable on harder-driven or more heavily modified setups.
For Stage 3 cars, we normally recommend setting the spark-plug gap to approximately 0.7 mm.
How often should spark plugs be changed?
On a tuned Fiesta ST180, we recommend replacing the spark plugs annually.
Worn plugs can cause hesitation or misfires under boost, particularly once cylinder pressure has been increased through tuning.
When should the cambelt and water pump be replaced?
As a preventative maintenance interval, we recommend replacing the cambelt at approximately 8 years or 80,000 miles, whichever comes first.
The water pump should be replaced at the same time. Much of the labour overlaps, so it makes little sense to reuse an ageing water pump during a cambelt replacement.
Should the gearbox oil be changed?
Yes. Many Fiesta ST180s reach high mileage without ever having their gearbox oil replaced.
We recommend using the correct Ford-specification 75W manual gearbox oil. Changing old gearbox oil is worthwhile preventative maintenance and may improve shift quality where the existing fluid has deteriorated.
Are PCV faults common?
PCV-system faults are relatively common on the 1.6 EcoBoost.
The PCV system and associated pipework should be inspected if the vehicle develops breathing issues, unexplained running problems or signs of excessive crankcase pressure.
Are rocker-cover leaks common?
The rocker cover is another common source of oil leaks as these cars age.
Any visible oil seepage should be investigated rather than simply cleaned away, particularly if oil is reaching ignition components or surrounding areas.
Can ignition coils cause misfires?
Yes. Ageing or failing ignition coils can cause misfires, particularly under boost when cylinder pressures are highest.
Before assuming a tuned car has a software or fuelling problem, the spark plugs, plug gap and ignition coils should all be checked.
Our recommended maintenance setup
For a tuned road car, we recommend:
Oil and filter every 12 months or 10,000 miles
Spark plugs every year
Genuine Ford plugs for most Stage 1 cars
Genuine Ford or NGK one-step-colder plugs for Stage 2
Approximately 0.7 mm plug gap for Stage 3
Cambelt and water pump around eight years or 80,000 miles
Gearbox-oil replacement if its history is unknown
Regular inspection of the PCV system, rocker cover and ignition coils
Vendor:Genuine Ford
Vendor:Genuine Ford
