Oil pressure difference (1 Viewer)

[stellz996]

So having an oil pressure gauge in the fj, at around 2000rpm highway and 100kph i normally see 40-43psi, these last few weeks i seeing 30-35psi. I just had it serviced a few weeks back so wondering if its possible that a different brand of filter (genuine) and a different brand but same viscosity oil could cause such a difference in readings?

Or anything else that could cause it thats not an engine problem. Also it might be worth noting the engine has been running a bit hotter than usual on days over 30°c (95-98°c), could this have caused the oil to thin out and degrade?

 

[BMThiker]

No answer for you, but watching for others to chime in.

 

[stellz996]

No answer for you, but watching for others to chime in.

Checked with mechanical test gauge today, same numbers as the aftermarket gauge i installed. Getting another oil and filter change soon and swapping back to ryco filter and using ac delco oil rather than mobil1.

 

[fjc-man]

What were you expecting to see for pressure? Normal pressure at 3000rpm 43 - 85psi and as low as 4.3 psi or more at idle. Normal operating temperature of engine oil is 325 degrees F.

 

[stellz996]

What were you expecting to see for pressure? Normal pressure at 3000rpm 43 - 85psi and as low as 4.3 psi or more at idle. Normal operating temperature of engine oil is 325 degrees F.

At 100kph i used to see 43psi now i see 33

At 3000rpm i used to see about 63 now i see 53

Idke is still around 14-15

Its the sudden difference that worries me

 

[fjc-man]

With no unusual engine noise it’s fine.