Elevated hydrocarbons is an indication of an engine that needs plugs or other ignition components. Elevated carbon monoxide is an indication that you may need an oxygen sensor or you may have a plugged air filter or the EGR valve may be dirty.
Petrol contain a high number of components.
Many use standard petrol, some use high octane petrol.
Assuming this is an older car a knocking noise on turning could mean one of the drive shafts is worn. Other things to check - are the bolts tight on the front wheels, if a very high mileage it could be worn wheel bearings.
The only demand that will become high when petrol prices rise is the demand for fuel-efficient cars.
Citroën is a French automobile manufacturer, started in 1919 by André Citroën.
Petrol has a higher value of the heat of combustion.
The headlight fuse on a Citroen Belingo is number 22 and 23 for low beam. Fuses 23 and 24 operate the high beams.
high cost
High octane gasoline (petrol) only provides better fuel mileage in vehicles that require the high octane. In a normal engine running higher octane provides no benefit.
high test
No
It depends on the engine. 100k, 200k, or 300k