Oil pressure difference

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stellz996

Joined
Mar 13, 2017
Messages
513
Location
australia
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?
 

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