Oil Pressure
Author
Discussion

jimslops

Original Poster:

6,419 posts

177 months

Tuesday 13th March 2012
quotequote all
Hello all,

Can a couple of you please do me a favour and tell me what your oil pressure is at 30mph in 3rd, 30mph in 4th
40mph in 3rd, 40mph in 4th, 70mph in 5th and idle oil pressure from cold.

I ask because I read someone quoting ideal in an advert and worried mine was different...my eunos measures in kg / m3 I believe.

Thanks in advance. I will double check mine tonight.

Eighteeteewhy

7,259 posts

191 months

Tuesday 13th March 2012
quotequote all
The oil pressure will start off high as the oil is cold and thick. Then drop off a bit as the oil gets warmer/thinner.

HTH

jimslops

Original Poster:

6,419 posts

177 months

Tuesday 13th March 2012
quotequote all
Eighteeteewhy said:
The oil pressure will start off high as the oil is cold and thick. Then drop off a bit as the oil gets warmer/thinner.

HTH
Yes, my car does this, just wondered what figures you chaps are getting. I am sure it is fine as I may see other signs, it has just made me a little paranoid.

Edited by jimslops on Tuesday 13th March 12:43

Riknos

4,701 posts

227 months

Wednesday 14th March 2012
quotequote all
jimslops said:
Yes, my car does this, just wondered what figures you chaps are getting. I am sure it is fine as I may see other signs, it has just made me a little paranoid.

Edited by jimslops on Tuesday 13th March 12:43
If it helps, I may or may not have overfilled my car with oil once, and it read maximum basically whenever I was on more than 50% throttle, regardless of speed/revs etc whistle

jimslops

Original Poster:

6,419 posts

177 months

Wednesday 14th March 2012
quotequote all
Riknos said:
If it helps, I may or may not have overfilled my car with oil once, and it read maximum basically whenever I was on more than 50% throttle, regardless of speed/revs etc whistle
Thanks, it seems to be dropping after warm and on lower revs from cold to just over 2 kg/m3, maximum I believe is 6

GC8

19,910 posts

213 months

Wednesday 14th March 2012
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Most people have pretend oil pressure gauges, so they wont be able to help.

You need to see what it reads when ticking over hot, then at 2,000rpm hot. If theyre at least the equivalent of 30-40psi at tickover, then you dont have anything to worry about.

jimslops

Original Poster:

6,419 posts

177 months

Wednesday 14th March 2012
quotequote all
GC8 said:
Most people have pretend oil pressure gauges, so they wont be able to help.

You need to see what it reads when ticking over hot, then at 2,000rpm hot. If theyre at least the equivalent of 30-40psi at tickover, then you dont have anything to worry about.
Yeah, i think it just sits over 2 when hot (kg/m3) is it?

GC8

19,910 posts

213 months

Wednesday 14th March 2012
quotequote all
I dont know, I have a pretend oil pressure gauge. biggrin

GC8

19,910 posts

213 months

Wednesday 14th March 2012
quotequote all
I will guess that the very early cars have a kilogramme force per square centimetre reading, not metre, or you will have a problem!

2kg/cm2 is about 28psi and just under 2BAR, so its alright... Im not sure what pressure a healthy warm engine should have at tickover though - if it was a 944 then Id expect to see 3BAR in a fit engine. The oil that you use can affect this, of course.

jimslops

Original Poster:

6,419 posts

177 months

Wednesday 14th March 2012
quotequote all
GC8 said:
I will guess that the very early cars have a kilogramme force per square centimetre reading, not metre, or you will have a problem!

2kg/cm2 is about 28psi and just under 2BAR, so its alright... Im not sure what pressure a healthy warm engine should have at tickover though - if it was a 944 then Id expect to see 3BAR in a fit engine. The oil that you use can affect this, of course.
Sounds right.

NeoVR

437 posts

194 months

Wednesday 14th March 2012
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jimslops said:
Yeah, i think it just sits over 2 when hot (kg/m3) is it?
Thats spot on.. itll end up over at 4 when driving and revs are over 2k
when its cold 4 is usually normal with 6 when driving.

The one thing my '5 and its pressure gauge taught me is a bit of mechanical sympathy with learning how long the oil takes to get to operating temp.

Tyrewrecker

Original Poster:

6,419 posts

177 months

Thursday 15th March 2012
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NeoVR said:
Thats spot on.. itll end up over at 4 when driving and revs are over 2k
when its cold 4 is usually normal with 6 when driving.

The one thing my '5 and its pressure gauge taught me is a bit of mechanical sympathy with learning how long the oil takes to get to operating temp.
Likewise. I tend to go easier on it when cold as a result. Infact I would probably go easier on it anyway as I want the best for my 5.