275 HP in 2000 Bounder DP

[Rexhall97]

My oil pressure gauge has "L" then the letters "NORMAL" then "H". I understand the concept. At start up (even when the engine is already hot) and at any normal start up, the oil pressure reads between the R and M in "Normal". Once I am on the road for 10 miles, the pressure drops to the N in normal. Often up hills or when travelling over 60 mph it dips below the N and gets close, but not quite to the L for low.

I read some other posts and this appears to be "normal"?

[J Walker]

I have a 2000 Freightliner chassis, XCS, and some of the gauges show only gross indications. The temperature gauge is poor and I am not sure about the oil pressure sensor. I have not paid much attention to my oil pressure gauge other than to see that I have pressure. I do have Silverleaf VSSpc and read the digital pressure. It ranges from 60 psi when the engine is at higher rpm to 30 psi at idle. I believe the gauge shows a similar swing. Make sure you are using 15W 40 oil and the rest should be ok. I can say that I don't get gauge readings above the Nomal.

[wonderer1]

when your oil presure is droping, what is your coolant temp. doing ? if it's rising this is reflecting how hard you're pulling your motor. hate those types of gauges.

[Rexhall97]

Wonderer1: Coolant temp is constant at any speed/situation

[WILDEBILL308]

Just wondering what oil are you runing? The last time it was changed? Filter? How maney miles?
Bill

[shogun1940]

I put in an auto meter mechanical gauge on my 99 /275 hp in a Winn. A couple of fittings and 30'of flexible hose.. 30 at idle 60 going down the road I have no confidence in old electrical gauges.

[Papa_Jim]

Originally Posted by shogun1940

I put in an auto meter mechanical gauge on my 99 /275 hp in a Winn. A couple of fittings and 30'of flexible hose.. 30 at idle 60 going down the road I have no confidence in old electrical gauges.

Agreed. At the very least, remove the electrical oil pressure sender at the engine, replace it with a mechanical oil pressure gauge. That will show you the actual oil pressure. It's probably OK. Then you can decide whether to replace the electrical gauge with a mechanical at the dash, or just knowing the pressure is OK will be good enough.

About the electrical gauge. It could be the ground for the gauge. Sometimes running a separate ground wire to the gauge can solve it.

[shogun1940]

I just took my Winnebago down the road. At 40 miles an hour 70 pounds of pressure and it registered on the M on the gaged electric gauge.. 30 pounds is between the O And the r On the electric gauge

[Hooligan]

This should be the values for the Freightliner gauges.