Just the one?
Champion Filters (not connected with Champion Spark Plugs)
10W30 in the engine.
Recommended....5W30.
Right side front of the oil pan.
Probably Wix.
On a 2000 Ford Windstar : There are ( 3 or 4 filters ) It may be equipped with a cabin air filter For the engine there is the air filter , oil filter , fuel filter
Purolator, but to Ford specs
Purolator Pure One is bascially a Ford Filter
How many does what have oil filters? it only has one oil filter and a oil strainer in the oil pan below oil pump
Front of engine, below oil filter
the rear passnger side corner of the oil pan
According to my Chilton's Auto Repair Manual : For the 1991 Ford Tempo , 2.3 litre four cylinder engine : ( 5.0 US. quarts with engine oil filter change )