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Normal oil pressure for 5.3

Normal oil pressure for 5.3

Postby tex50 [OP] » Jun 01 2012, 2:10am

Can someone tell me the normal oil pressure ranges I should be experiencing. 103k. Valvoline high mileage 5w 30w. Napa gold filter. Little bigger than stock. Thanks.
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Re: Normal oil pressure for 5.3

Postby ASTE25 » Jun 01 2012, 4:16am

I'd say 45-50 when warm.
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Normal oil pressure for 5.3

Postby Machster69 » Jun 01 2012, 4:22am

My 2010 idles 25 warm
My 08 idles 35-40 warm
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Re: Normal oil pressure for 5.3

Postby 2003Z71 » Jun 01 2012, 4:25am

I run 5W30 Mobil One in my 2003 5.3 with 100K on the clock. 40 psi at idle hot, and 55 psi at highway speed.
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Re: Normal oil pressure for 5.3

Postby tex50 [OP] » Jun 02 2012, 11:25am

I get 60 cold idle to 70 running cold. 40-45 warm idle to 60 running warm. Idle seems consistent to your numbers but upper end seems high. Good or bad?
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Re: Normal oil pressure for 5.3

Postby Z15 » Jun 02 2012, 12:09pm

Don't use speed as the factor, use rpm's.

Here is some info that may help Oil Pressure

Low oil pressure is not necessarily bad....in fact it can be very beneficial within reasonable limits.
High oil pressure is not necessarily good....in fact it can be a cause of great concern.



Circulation of the oil is produced by a pump and not a compressor. The most important criterion for good lubrication is oil flow and not oil pressure. The oil pressure will vary considerably around the engine, declining with distance downstream from the pump.
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Normal oil pressure for 5.3

Postby Machster69 » Jun 02 2012, 12:11pm

Gm spec is 6psi/1000 rpm

Anything lower is considered low
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Re: Normal oil pressure for 5.3

Postby EKinMN » Jun 02 2012, 1:57pm

So at idle it should be around 6 PSI or less? :shock:
Mine is about 25 at warm idle in Park, 20 at warm idle in Drive and slightly over 40 at 200RPM warm while normal driving.
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Normal oil pressure for 5.3

Postby Machster69 » Jun 02 2012, 2:37pm

No idle is like 500-600rpm which means, it can be 3-4 lbs...
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Re: Normal oil pressure for 5.3

Postby Explorer » Jun 02 2012, 3:02pm

You're fine tex50. If I had a engine running 3-4 psi at idle, I'd be looking for an overhaul. Tolerances are a lot tighter than they were 40 years ago. Thats why recommended oil weights should be used. In general, "Safe" has always been 10psi per 1,000 rpm, not "recommended" that low.
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