oil pressure drops at 220

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Apr 12, 2002 | 10:12 AM

blkform88

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From: chicago

oil pressure drops at 220

When I get my 305tpi lb9 running at 220 degrees, the oil pressure will drop from 30 to about 15. I had an oil and filter change about a month ago. Has anyone else had this happen? How much of a problem is this?

Apr 12, 2002 | 10:13 AM

Mark A Shields

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Joined: Jan 2001

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From: Someone owes me 10,000 posts

Car: 99 Formula

Engine: LS1

Transmission: T56

Axle/Gears: 342

It's normal for when the car to heat up oil pressure drops, as the oil gets thinner. As to whether dropping to 15 is good, a good rule of thumb is 10 psi for every 1,000 rpms.

Apr 12, 2002 | 02:01 PM

86Tra/maro

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From: Newark,NJ The state where racing on I 78 rules.

I would switch to a thicker oil maybe 20w50 for summer time use.
njdaewoo

PS: Check out my Trans am+ Iroc = Tramaro

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oil pressure drops at 220-njdaewoo-car.jpg

Apr 12, 2002 | 02:51 PM

rezinn

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Joined: Dec 2000

Posts: 3,813

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From: California

If this is at idle, it's not a problem.. although the pressure change should be a gradual fall. If otherwise, your oil pressure sender may be giving you bad readings.

Apr 12, 2002 | 03:32 PM

85transamtpi

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From: Chitown

It is normal for oil pressure to drop as your engine temp. rises. Remember that hot cast iron expands.

Your pressure should be fine as long as it goes up with increasing revs.

-Doug