a 1998 car will have (2) 02 sensors per bank. In other words, a v6 or v8 will have a total of 4 sensors and a 4 cyl. will have 2 sensors. One is located before the catalytic converter and one is after or behind the cat.
The 1998 Ford Mustang owners manual shows ( 5 quarts ) WITH FILTER CHANGE
there are 2
They have 4 total two in the front two in the back
It depends if you have the dual exhaust (in the case of the GT). With the GT there are four o2 sensors. One on each pipe directly before and directly after the converters.
two o2 sensors on a 93 mustang 5.0
There are many online resources for information about the 1998 Ford Mustang. Some places are sites like Wikipedia, who have encyclopedia-style articles about a massive amount of topics.
According to fordparts.com the 1989 Ford Mustang GT has ( 1 ) oxygen sensor
With engine oil filter change ( 5 quarts ) for the 3.8 liter V6 engine in a 1998 Ford Mustang according to the Owner Guide
With engine oil filter change , the 4.6 L V8 takes : In the 1998 Ford Mustang ( 5 quarts ) In the 1998 Ford Expedition ( 6 quarts ) In the 1998 Ford F-150 ( 6 quarts )
The 2001 Ford Mustang has 12 valves.
The 2010 Ford Mustang has 12 valves.
The 2012 Ford Mustang has 24 valves.