1990 Nissan 300ZX Oil Pressure Drops

NISSAN 300ZX
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MARTYDGRISSOM
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I have a 1990 nissan 300zx
I recently bought it. lately I have notice when i take off the oil pressure drops down a bit. Could someone explain what could cause this problem?
Apr 16, 2006 at 3:59 AM
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LOSONE
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That response measn either you are low on oil, it needs changing, the sending unit is bad or a worn oil pump.

The last you don't want to hear, an engine with some bad beariing causing a loss of oil pressure.

How many miles on the engine??
Apr 16, 2006 at 6:00 AM
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MARTYDGRISSOM
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There is about 110,000 miles give or take a few. I thought it might need a oil change. what kind of bearings are they.
Apr 17, 2006 at 2:30 AM
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LOSONE
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  • 1,616 POSTS
Connecting rod and cam bearing you will hear first. TRY the oil change with Castrol High mileage 10W30 (green bottle) and a Honda orig filter.
Apr 17, 2006 at 8:49 AM
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MARTYDGRISSOM
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Thank you for your info. I will try the oil change. I'll keep you posted. Again, thank you
Apr 18, 2006 at 2:33 PM

Suggested Repair

Verify the oil level and change the oil using Castrol High Mileage 10W-30 with a Honda original filter. If pressure still drops when accelerating, have the oil pressure sending unit, oil pump, and possible worn connecting-rod or cam bearings checked.

Conversation Summary

The owner of a 1990 Nissan 300ZX with about 110,000 miles noticed oil pressure dropping when taking off. The expert said possible causes include low oil, oil needing a change, a bad sending unit, a worn oil pump, or worn bearings. They recommended trying Castrol High Mileage 10W-30 and a Honda original filter first, and the owner agreed to try the oil change.

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