R134a
R134A is the only approved refrigerant for automotive use.
The 2002 Ford Focus runs on regular unleaded.
According to the 2002 Ford Focus Owner Guide : ( 5W-20 ) engine oil is recommended
Ford doesn't use timing marks sorry
5w-20
According to the 2002 Ford Focus Owner Guide : For the 2.0 litre SPI engine and the 2.0 litre Zetec-E engine : ( 5W-20 )
r134a
134A
R-134a
A 1998 Ford Windstar would use refrigerant 134a
all you need is a torx screwdriver
For a 2002 Ford Focus, it is recommended to use a coolant that meets Ford's specifications, specifically a 50/50 mixture of distilled water and Ford Premium Engine Coolant (which is typically a green, ethylene glycol-based coolant). Ensure that any coolant you use is compatible with aluminum engines, as the Focus has aluminum components. Always check the owner's manual for specific recommendations and to verify any updates on coolant specifications.