oil pressure drops at high speed
12-10-2011, 12:35 PM
#1
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oil pressure drops at high speed
hi guys
temp 50f , oil pressure at idle 30psi , oil 20w50 because in summer it
reach 130+(saudi arabia is a hell)
just add 4 liters of oil without changing oil filter
i was driving on highway at 135 for 1 minute i notice the oil pressure drops
to 60 then i put the car in neutral the oil pressure goes to 10-15psi i slow
down to 80 for 10 minute then i put the car in neutral the oil pressure goes
to 30 so whats the problem should i change the oil pump
my car 03 touring 6 speed
i know i have horrible English.
temp 50f , oil pressure at idle 30psi , oil 20w50 because in summer it
reach 130+(saudi arabia is a hell)
just add 4 liters of oil without changing oil filter
i was driving on highway at 135 for 1 minute i notice the oil pressure drops
to 60 then i put the car in neutral the oil pressure goes to 10-15psi i slow
down to 80 for 10 minute then i put the car in neutral the oil pressure goes
to 30 so whats the problem should i change the oil pump
my car 03 touring 6 speed
i know i have horrible English.
12-10-2011, 09:18 PM
#5
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Sounds about right, i would look into a oil cooler
12-11-2011, 05:09 AM
#6
When you say 135 do you mean mph or kph?
What mods done to the car?
Whwn was your last oil change?
Is the oil you added the same as the oil that is in the car?
I would doubt its the stock pressure sending unit. Usually when they go bad people repost seeing it either pegged at max pressure or at zero.
Its possible that you are heating the oil enough to cause the drop in pressure. As you slow your speed and lower the revs the oil recovers a bit and you see the pressure climb back to normal. I would recommend an oil change and pour some of the used oil through a coffee filter and look for flakes of copper (bearing material). If the oil is clean you should be OK.
What mods done to the car?
Whwn was your last oil change?
Is the oil you added the same as the oil that is in the car?
I would doubt its the stock pressure sending unit. Usually when they go bad people repost seeing it either pegged at max pressure or at zero.
Its possible that you are heating the oil enough to cause the drop in pressure. As you slow your speed and lower the revs the oil recovers a bit and you see the pressure climb back to normal. I would recommend an oil change and pour some of the used oil through a coffee filter and look for flakes of copper (bearing material). If the oil is clean you should be OK.
12-11-2011, 10:59 AM
#7
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i have brand new oil cooler i think i will use it 
thanks bro i will check it after 2000 miles
i wish to have ls2 or ls1 in my z
p.s i think vq35 is a girly engine so sensitive and need care
When you say 135 do you mean mph or kph? mph
What mods done to the car? cat back and cai
Whwn was your last oil change? less than 500 mile
Is the oil you added the same as the oil that is in the car?
the same viscosity
I would doubt its the stock pressure sending unit. Usually when they go bad people repost seeing it either pegged at max pressure or at zero.
Its possible that you are heating the oil enough to cause the drop in pressure. As you slow your speed and lower the revs the oil recovers a bit and you see the pressure climb back to normal. I would recommend an oil change and pour some of the used oil through a coffee filter and look for flakes of copper (bearing material). If the oil is clean you should be OK.
What mods done to the car? cat back and cai
Whwn was your last oil change? less than 500 mile
Is the oil you added the same as the oil that is in the car?
the same viscosity
I would doubt its the stock pressure sending unit. Usually when they go bad people repost seeing it either pegged at max pressure or at zero.
Its possible that you are heating the oil enough to cause the drop in pressure. As you slow your speed and lower the revs the oil recovers a bit and you see the pressure climb back to normal. I would recommend an oil change and pour some of the used oil through a coffee filter and look for flakes of copper (bearing material). If the oil is clean you should be OK.
i wish to have ls2 or ls1 in my z
p.s i think vq35 is a girly engine so sensitive and need care
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