Low oil pressure can be extremely damaging to an engine. It is also a good prognosticator of a more serious problem. This is something that you do not want to allow to continue because it will cause severe damage to your engine or even destroy it. Being able to diagnose these issues is a skill that the average car owner can acquire.
This process does not require tools.
Causes of Low Oil Pressure
Oil Viscosity
Using an oil with a viscosity that is too heavy will cause the pressure to run low. One way to fix this is to try a thinner oil. Make sure to read the owner's manual and change the oil to a viscosity that is appropriate for your area and climate.
Clogged Oil Filter
Check the oil filter to make sure that it is not clogged with debris. Sometimes a large clump or grit will build up and cause the filter to clog. An oil change can fix the problem.
Oil Pump is Failing
Failure of the oil pump is another issue. If the oil pump is beginning to go out it will cause the oil pressure to drop. These need to be professionally checked.
Bad Oil Gauge
Failure of the oil gauge is also a possibility. Before taking the oil pan off or getting a major repair you should have the car's oil pressure checked by a local auto store. They will do this for free, and this will back up the result you are getting from your oil pressure gauge. A professional needs to repair this issue.
Faulty Gaskets
Examine the gaskets around the engine head and around the oil pan underneath the car. The best way to do this is to wipe the edges clean with a cloth and then drive or run the car for a few minutes. Make sure that you do get the oil warmed up, since this will allow it to leak and show you where the issue is. If you see large amounts of oil leaking, this can force the engine oil pressure to drop.
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