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Harold, According to the 2002 Ford Focus Owner manual,
With engine oil filter change : 2.0 liter SPI engine takes ( 3.78 liters / 4.0 U.S. quarts of 5W-20 )
2.0 liter Zetec engine takes ( 4.25 liters / 4.5 U.S. quarts of 5W-20 )
links below talk more about what they think oil should be used. "I hope this helped you out, if so let me know by pressing the helpful button. Check out some of my other posts if you need more tips and info."
If the oil is on top of the plug, your valve cover gasket is leaking. (easy fix). If the oil is on the bottom of the plug (on the screw threads) you have a problem. It could be a burnt valve, blowed piston ring, or even a head gasket. Please let me know more info on EXACTLY where the oil is coming from. Hope this helps, James Booth
HI,your ford may have gear problem which is common on ford mondeo,first check the gear oil if its reddish then your oil is ok and if its burnt like brown colour then you should change the gear oil as well the gear oil filter.
1)new spark plugs properly gapped.
2)new air filter (check every 35000 miles)
3)new fuel filter (every 35000 miles)
4)1 bottle of STP fuel treatment (red bottle) 4x a year.
5) oil and filter change (castrol or another good quality oil every 3-4000 miles.
6)proper air pressure in tires (check every 2 months
7) service transmission every 40000 miles or less.
New oil and filter
8) new plug wires every 80000 miles.
My dad had this problem for years. He always cleared it out when the engine misfired. Ford did not want to know. Garages did not want to look.
Eventually i found someone who had seen it before.
Along side each pair of plugs there is a 'core plug' sitting at the bottom (some Focus's have a sort of big grub screw instead). These get pourous or holed letting coolant out.
It is hard to see these things as they will be under a layer of 'silt'.
New core plus fitted and job done. No problem for 6 months now.