When you replace your oil filter it come with a new gasket. Just make sure when you remove / replace the old oil filter the oil gasket comes out with it.
Buy a new 2000 ford expedition
Where is the transmission dip stick located on a 2000 Ford Expedition and where do you insert the transmission fluid at?
In the oil pan under the oil filter the filter screws onto it
With engine oil filter change ( 6.0 quarts ) according to the 2000 Ford Expedition Owner Guide
Its in the gas tank, part of the pump assy.
According to the 2000 Ford Expedition Owner Guide : Motorcraft ( FA-1634 ) is the engine air filter used for the 4.6 and 5.4 liter engines
Be sure you are installing the correct oil filter for that engine.
Cabin Air FilterMost 2000 Ford Expeditions will NOT have a cabin air filter. It was a dealer installed option for this year. And the parts for the dealer installed option were difficult to come by. If it exists in your 2000 Ford Expedition (and it probably does not), it is underneath the glove box. You need to remove between 3 and 9 screws to get to the cabin air filter.
According to the 2000 Ford Expedition Owner Guide ( 5W-30 ) * with engine oil filter change , 6.0 U.S. quarts of 5W-30 engine oil
I believe it is 6 quarts ( 5.7 liters ) with filter change
Both the 4.6 liter and 5.4 liter V8 engines in a 2000 Ford Expedition take : With engine oil filter change : ( 6 quarts ) according to the Owner Guide
According to the 2000 Ford Expedition Owner Guide : With engine oil filter change : Both the 4.6 and 5.4 V8 engines take : ( 6.0 U.S. quarts of 5W-30 )