Oil Pressure Gauge Up & Down

Joined
Dec 20, 2004
Messages
94
Does anyone know why the oil pressure gauge would go up when accelerating and then down when slowing down. Well, that's what my LC does, actually for a while now.

To mitigate, I recently changed the oil, all fluids and valve gasket.

Thanks!
 
Joined
May 19, 2008
Messages
1,077
Location
willamette/umpqua divide
oil pressure is directly related to RPM, if you are lower than the low mark on the gauge when driving I'd worry, but if you are close to the top of the normal range while driving and at the bottom of the normal range when idling you ought to be fine.
 
Joined
Jan 22, 2009
Messages
4
Location
Huntsville, AL
MIne does the same thing and it is all related to RPMs, like tblume said. AS long as it isn't dropping when you are in the gas,t hen you shoudl be fine.
 

e9999

You want to do what...?
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Joined
Sep 21, 2003
Messages
16,672
Location
US
yes, of course, the oil pump.

Mine tops off a hair over the 2/3 (or is it 3/4?) line regardless of rpm above that. Presumably where the pressure relief valve kicks in...
 
Joined
Dec 20, 2004
Messages
94
Yes, it increases as I drive faster then decreases as I slow down. But, it doesn't go to a low point when idle. Should be okay then. Thanks!
 

e9999

You want to do what...?
Moderator
 
 
Joined
Sep 21, 2003
Messages
16,672
Location
US
the absolute level of pressure you'll see on the gauge will also depend significantly on the weight of the oil. When I switched to 15W40 there was a big jump up in pressure, as expected.
 

96r50

 
Joined
Feb 25, 2007
Messages
2,817
Read the owners manual. It explains the oil gauge behaviour and acceptable ranges.
 
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