'05 V6 low oil pressure at idle. - Nissan Forum
 
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post #1 of 8 Old Sep 20th, 2005, 06:06 PM Thread Starter
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'05 V6 low oil pressure at idle.

Figure I'll ask before I run off to the dealer. At idle my '05 V-6's oil pressure needle drops way down. The slightest tap on the gas makes it go right back up. So I think the gauge is telling the truth but since it doesn't show psi I'm not sure of the exact numbers. I don't want to burn it up due to lack of oil pressure. Anybody else notice this?
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post #2 of 8 Old Sep 20th, 2005, 08:23 PM
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Quote:
Originally Posted by Worren
Figure I'll ask before I run off to the dealer. At idle my '05 V-6's oil pressure needle drops way down. The slightest tap on the gas makes it go right back up. So I think the gauge is telling the truth but since it doesn't show psi I'm not sure of the exact numbers. I don't want to burn it up due to lack of oil pressure. Anybody else notice this?

Yah, mine does that too. It's normal. I noticed the Titan drops down also. Just as long as it pops back up when you put more "R's" on it she'll be just fine.
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post #3 of 8 Old Sep 20th, 2005, 11:07 PM
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Mine does it too. Apparently this is normal. I seem to recall reading about it in the Owner's Manual but now I can't find where I read it. My other vehicles do this same thing when the engine is up to temperature and idling.

Someone once told me a good rule-of-thumb is to have at least 10 psi for every 1000 rpm. Any less is an indication that something is wrong and trouble will soon follow.

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post #4 of 8 Old Sep 21st, 2005, 06:54 AM
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Yeah, it's normal. In fact, all vehicles have lower oil pressure at low RPM. Most vehicles today don't have an oil gauge -- only an idiot light. So, you'd never notice it unless the light went off.
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post #5 of 8 Old Sep 21st, 2005, 07:22 AM Thread Starter
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I'm risking getting things thrown at me but my son owns a Kia Optima that has an oil gauge that reads in psi. It drops less than 3 pounds while idling.
Since the consensus here is that it's a normal thing I'm going to basically forget it but still keep an eye peeled.
Thanks.
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post #6 of 8 Old Sep 21st, 2005, 05:06 PM
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Quote:
Originally Posted by Worren
Figure I'll ask before I run off to the dealer. At idle my '05 V-6's oil pressure needle drops way down. The slightest tap on the gas makes it go right back up. So I think the gauge is telling the truth but since it doesn't show psi I'm not sure of the exact numbers. I don't want to burn it up due to lack of oil pressure. Anybody else notice this?
This issue is covered on page 2-8 of the owner's manual. It is pretty normal for a vehicle with a real oil pressure gauge. Most don't, by the way--what passes as a gauge in most vehicles doesn't really indicate actual oil pressure but warns when it drops below an acceptable level.

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post #7 of 8 Old Sep 22nd, 2005, 07:37 PM
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Rev Biker, when you did your dyno runs post exhaust and cold air intake did you also have an air flow ratio also? did it change any
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post #8 of 8 Old Sep 22nd, 2005, 11:01 PM
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Rev Biker, when you did your dyno runs post exhaust and cold air intake did you also have an air flow ratio also? did it change any
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I have done a number of dyno sessions on this truck; when I did the baseline pulls the air/fuel ratios were good, in the 12-13 area. I opted not to pay the extra cash for the A/F readings when I did the next couple of sessions, but did hook up the sniffer when I tested the aFe intake. I didn't include the A/F readings on the graph because they were pretty well in line (none over 13.2:1) and they made the overall graph too small to be legible onscreen. In general I have found that an intake change doesn't lean out the A/F ratio too much unless a new, larger MAF sensor and/or throttle body are added.

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