oil psi drop at idle

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KNM
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oil psi drop at idle

Post by KNM »

so i went and got my oil changed now i notice,
that when at a stop, my oil psi drops from the normal 52psi (not exactly that but close)
down to i would say around 35 psi.

what could cause this?
is this normal for a 2000 pontiac bonneville SE?

thankyou,
KNM.
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spoiledred94
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Re: oil psi drop at idle

Post by spoiledred94 »

Yeah I "think" that is normal. In my 94 SE that I had for 7 years had a range of Oil pressure from 30 ish at idle up to a lot higher or so at wot. My 2001 SSEi is somewhat the same though to a lesser extent. Your oil change may have cleared some sludge and clogs letting the op change more freely.
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crash93ssei
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Re: oil psi drop at idle

Post by crash93ssei »

It is normal for oil pressure to drop at idle with any engine. As long as when the RPMs go up the oil pressure does as well then you are fine and that is normal.
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BlackHawk99
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Re: oil psi drop at idle

Post by BlackHawk99 »

The general rule of thumb is that you need 10 lbs of oil pressure for every 1,000 engine RPMs. Anything below that you know the clock is ticking for an engine replacement simply due to wear and/or neglect.
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Re: oil psi drop at idle

Post by 01bonneSC »

BlackHawk99 wrote:The general rule of thumb is that you need 10psi of oil pressure for every 1,000 engine RPMs. Anything below that you know the clock is ticking for an engine replacement simply due to wear and/or neglect.
Just so its clear :)
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