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It takes a few seconds for the oil pump to fill the oil filter and then pressurize the engine's lubrication system.
If your Jeep has the earlier AMC based 4.0, 4.2, or 6.0 liter engines, the oil filter is rather large and takes a few seconds longer to fill. If you change your own oil, you can prefill the filter with oil if the filter mounts with the filter pointing upwards... horizontal mounting makes for a mess.
If you change the oil and the pressure registers within 6 or 7 seconds of start-up and idle, there is no damage to the engine. I have had an engine that was run for three or four 15 second runs without damage (I made an oops installing an oil pump and it wouldn't prime).
If you are concerned about oil pressure, have the engine checked with an external pressure gage. If the pressure is below specifications, the pump may be worn and is taking too long to build up pressure after an oil change. The AMC pumps give long service and usually only need replacement after very high milage.
What else can I help you with?
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A 1991 Jeep Cherokee computer is what fits a 1991 Jeep Cherokee.
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The fuel pressure regulator on a 1994 Jeep Grand Cherokee is part of the pump module in the fuel tank.
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A 1998 Jeep does not have a cabin filter.
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Jeep dealer.
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Which one?
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Change radiator on 95 Jeep grand Laredo?
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A 1998 Jeep Cherokee does not have a mass airflow sensor. It uses a manifold pressure sensor, MAP, which is on the rear of the intake manifold.
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Yes
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"how do you change a throttle position sensor on a 1998 jeep grand Cherokee?" could someone without any experience do it?
What year Jeep Cherokee computer fits a 1991 Jeep Cherokee?
A 1991 Jeep Cherokee computer is what fits a 1991 Jeep Cherokee.
You have 2004 Jeep Grand Cherokee Laredo brake and abs light is on how can you fix it?
How to change the brake switch on a 2004 Jeep grand Cherokee Laredo
