Basics, If the battery is OK and the starter just clicks it is the starter. If the starter turns the engine over but won't start it could be a crankshaft or camshaft sensor or fuel pump. It needs to be diagnosed or it can be extremely costly to just replace a lot of unnecessary parts in it.
because their piece of junk!
typical Chrysler product
yes
Because you didn't charge the battery.
Unless you ran it out of oil and the engine is locked up, it is not the oil.
There could be a few reasons why a 1990 Chrysler Lebaron will crank but not start. The fuel pump could be out or the car could be out of gas. There may be a malfunction in the ignition system causing no spark.
teeth on fly wheel may be rounded or teeth on stearter drive are rounded.
5w30
Try the crank sensor/cam sensor. It will ack like it is out of gas when it acts up, may start fine then suddenly it will ack like it is out of gas.
The instrument cluster can cause that problem. It shorts out the communication system between the computers.
See link below
4.5 quarts.