I run the Motorcraft 5W-20 with a Motorcraft filter in my daughters 2000 Focus ZX3 Z-TEC 5-speed manual with 5000 mile change intervals.On a side note, I performed some maintenance on my son's 1999 DOHC Neon 5-speed manual last month.I replaced the spark plugs, wires, A/F, 5W-30 Maxlife (120,000 miles) with a Purolator oil filter. I also had to replace the coolant temperature sensor because it was throwing a code and replaced the valve cover gasket and the leaking sparkplug tube o-rings since the spark plug tubes were full of oil! Anyway, the top end of the little Neon motor was perfect! No sludge anywhere to be seen; it looked new! And the compression test showed between 170-180Psi.
