ISX Oil Pressure

[Dutch Star David]

My ISX 650HP only shows 35PSI oil pressure at normal operating temperature and 65 MPH. This seems low to me. Anyone know if this is normal or not?

[FlyingDiver]

Originally Posted by dlovitt

My ISX 650HP only shows 35PSI oil pressure at normal operating temperature and 65 MPH. This seems low to me. Anyone know if this is normal or not?

I don't remember specifically, but that seems like about what mine is.

I think the ISX uses high flow rather than high pressure. It holds 45 quarts of oil, after all.

joe

[RustyJC]

You're not alone. From an OTR truckers' forum:

Not to mention that I’m bothered by Cummins’ belief that 35 psi oil pressure is adequate… every time I start my truck up I wonder what the heck they were smoking when they came up with that one.

Looks like 35 psig is the nature of the beast.

On Edit: Check HERE - the oil pressure spec is in the table toward the bottom.

Rusty

[Dutch Star David]

Thank you both-takes one worry off my plate.

[Gary RVRoamer]

That's probably not the real pressure anyway. Most Cummins electronic engines just have an Oil OK/Not Ok indication and they display an arbitrary value on the gauge as long as the oil pressure/flow is OK. Mine (ISL) always says 55 psi, no matter what.