Why you should change your oil

[puckgrinder85]

Unless the diesels are different, he's right on the OP sender, its just a switch on the gas engines, they dont fluctuate. Dont see why the diesel would be different.

 

[Soundguy]

i swear it seems to come up to a point, then move a hair higher? I'll have to look real close tonight when leaving work.. maybee I'm getting the yukon mixed int here.. I know it's oil pressure gauge changes with rpm.. etc..

 

[94BULLITT]

Not sure. After I changed the oil the pressure gauge was right in the middle.

Chris

I have seen them right in the middle but you put a mechanical gauge in it and it show 5psi.

 

[94BULLITT]

this doesn't 'appear' to be how it really works... at least on my fords. at startup, the op comes up within a sec or so, hits lower mid of guage, in another couple sec's, hit mid or a hair above.. pretty much stays there.

if it was really an open /closed issue.. seems the gauge would hit it's mark as soon as it came up and not adjust after another second? unless the gauge is some how settling...

ot saying you are wrong on this.. just saying it appears to act different inthe 3 powerstrokes I have..

It is after a certain year. I am not sure what all models are like that. It is not just Ford that is like that. I have changed the oil in a lot of vehicles and as soon as they fire the gauge is in the middle.

Watch this Ranger how quick the gauge comes up.

 

[Peacock]

The diesels are different. They use a proper sending unit. But the do use a 'slosh module' that dumbs down the signal and basically shows you an average reading without the highs and lows.

 

[Soundguy]

It is after a certain year. I am not sure what all models are like that. It is not just Ford that is like that. I have changed the oil in a lot of vehicles and as soon as they fire the gauge is in the middle.

Watch this Ranger how quick the gauge comes up.

now I'm wondering.

I'm going to pay extra attention to mine this weekend.

my 350 and 450 are older.. IE.. 99 early and late models respectively. Setting here at the screen.. my mind is telling me the needle throbs to lower mid, then ups to about mid after a total of 2 seconds. lower mid after a second.. seems to do this on both 350/450. Can't say for sure on the 250.. it's my work truck and I'm usually thinking about work when I get within 5' of it..

 

[Soundguy]

The diesels are different. They use a proper sending unit. But the do use a 'slosh module' that dumbs down the signal and basically shows you an average reading without the highs and lows.

ok, so it's a compensated gauge setup.. I'm familiar with those... keeps you from having the 'nervous' gauge syndrome like some mechanicals have when run with no restriction orifice.

Feel better now.. thought I was going crazy

 

[94BULLITT]

now I'm wondering.

I'm going to pay extra attention to mine this weekend.

my 350 and 450 are older.. IE.. 99 early and late models respectively. Setting here at the screen.. my mind is telling me the needle throbs to lower mid, then ups to about mid after a total of 2 seconds. lower mid after a second.. seems to do this on both 350/450. Can't say for sure on the 250.. it's my work truck and I'm usually thinking about work when I get within 5' of it..

I don't think there are like that. I think you have to get up into the mid 2000's. I prefer a mechanical gauge because you really know what you have.

 

[frischtr]

ok, so it's a compensated gauge setup.. I'm familiar with those... keeps you from having the 'nervous' gauge syndrome like some mechanicals have when run with no restriction orifice.

Feel better now.. thought I was going crazy

Could be, I know Dodge's use a switch to show pressure to the ECM. The ECM then uses coolant temp and rpm inputs to determine what the dummy gauge shows, not a real reading at all. I have installed Isspro gauges in my truck, including a real oil pressure gauge.

 

[dstig1]

Many if not most oil pressure "gages" are just fancy idiot lights nowadays. I remember when Saturn came out they had real gages. After a couple years they went to the "idiot gage" type. I asked a sales guy (an actually knowledgeable one) why after a test drive and he said "I get that you understand it, but we would get many calls from people saying the oil pressure gage was going all over the map as they drove and asking us to fix it. Far easier for the company to just make it a dumb gage..."

The average idiot is too much below average, IMHO...