You plan to spend an hour or so changing the oil and filter. However, it turns into a much longer task because you have difficulty removing the old filter. More than likely it was installed improperly. Here are few suggestions for removing stubborn filters.
First, make sure you are turning the filter in a counterclockwise direction to remove it rather than tightening it further. Your sense of direction can get confused when laying on your back or doing contortions to get at the filter.
Position a strap type filter wrench as close to the filter base as possible to reduce the chances of crushing filter. Sometimes two wrenches will help. For instance, use both a strap type and end cap type wrench. This requires two hands, and sometimes two pairs of hands. If you can, increase the lever arm by placing a piece of pipe over the wrench handle. Sometimes large channel lock pliers can be used to grab and turn the filter if you can get it around the filter. Also wrap the filter with some duct tape to increase friction between the filter and the wrench.
If these do not work, you will have to resort to more desperate methods. However, be careful not to be too aggressive and damage the threads or score the surface of the filter mounting surface. Pierce the filter with a large screwdriver and use it to apply more leverage. If room permits, use a chisel placed at the filter's rolled edge and tap with a hammer a few times to loosen the base. Insert a pry bar between the filter base and mounting surface to gently loosen a stuck filter. If all else fails, tear or peel the filter's can off the base. Then use a chisel to loosen the base from the mount.
Avoid using heat from a welding or propane torch to unstick a stuck filter. It is quite easy to burn wires and hoses or even start an engine fire, especially if the engine compartment is dirty.
When replacing the filter, only hand tighten to make it easier to remove the next time. Follow the instructions usually found on the filter itself. Normally, this means continuing to turn the filter about 3/4 to one full turn after the filter gasket contacts the mounting surface. The gasket should also be lightly coated with oil to prevent the gasket from sticking and distorting resulting leaking. Then run the engine for a few minutes. Put a piece of clean cardboard under the filter's location to check for drips and leaks.
