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wrench9124, ASE Certified Technician
Category: Car
Satisfied Customers: 3432
Experience:  GM Master Certified, ASE Master Certified, 32 years exp, GM Hybrid Certified, GM Mark of Excellence
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what is the oil pressure in a 8.1L vortec

Resolved Question:

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Submitted: 9 years ago.
Category: Car
Expert:  wrench9124 replied 9 years ago.

Hello, here is the oil pressure spec. i hope this info was helpful

  • Oil Capacity - Without Filter


6 Qts

  • Oil Pressure - Minimum

34 kPa @ 1,000 RPM

5 psi @ 1,000 RPM

  • Oil Pressure - Minimum

69 kPa @ 2,000 RPM

10 psi @ 2,000 RPM

Customer: replied 9 years ago.
Reply to wrench9124's Post: I have an 8.1L not a 5.7 this does not answer my question for the 8.1L after pulling a trailer the oil pressure droped to 20 p.s.i at idle brfore it was at 40p.s.i at idle why is it doing this
Expert:  wrench9124 replied 9 years ago.
Ok, that is the spec for a 8.1 engine, the 5.7L is the oil capacity in metric. not uncommon for oil pressure too get lower after pulling a load. at 20 psi, the oil pressure is still above factory spec.
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