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  #1  
Old 12-06-2009
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GOT OIL?

i live in illinois and i've got the 2001 2.5l and it just started to get cold, but the last couple of days i left my house and the check engine light comes on and my oil pressure gauge reads zero for about 2 blocks. then it comes and goes for a minute and then its fine. i don't know if the cold has anything to do with it but the oil itself should be fine, i changed it like 2000 miles ago and there's 74,000 on the truck. any ideas?
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Old 12-06-2009
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What weight oil are you running?
Are you letting your truck warm up?

The only thing I can think of is a bad oil pump or too thick of oil
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Old 12-06-2009
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5w30 like it recommends, i'm thinking about going to 5w20 in case the pump is getting weak, and its a whopping 30 degrees outside anyway. usually i don't let it warm up but this has never happened before
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Old 12-06-2009
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Originally Posted by rangerdanger01 View Post
5w30 like it recommends, i'm thinking about going to 5w20 in case the pump is getting weak, and its a whopping 30 degrees outside anyway. usually i don't let it warm up but this has never happened before
5 is the weight, so I don't think going to 5w20 would do anything. At least that's how I see it.
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Old 12-06-2009
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yea 5 is the weight, but the 30 means winter, so when its cold its like a 30 weight until it warms up, that's how my auto teacher explained, so a 5w30 is thicker than a 5w20. the 20 would be a little bit thinner and hopefully easier on the pump
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Old 12-06-2009
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Originally Posted by rangerdanger01 View Post
yea 5 is the weight, but the 30 means winter, so when its cold its like a 30 weight until it warms up, that's how my auto teacher explained, so a 5w30 is thicker than a 5w20. the 20 would be a little bit thinner and hopefully easier on the pump
Makes since - Now that you say It I feel like a idiot because I think your right.....

Now I wonder why all the ATV guys go from 10W to 5 or 0 W to fix start up issues? - Sorry off topic
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Old 12-07-2009
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Try giving it another oil change using what you usually use. The only problem with going with a 5w20 instead of 5w30... is the 20 is lighter and not as heavy and durable as the 30... I dont know how much of a differance it is, but it could cause more engine wear. did you check that you are not leaking oil? if there is enough of an oil leak, you would lose pressure. I would suspect oil pump though, it would not be unheard of ... but kind of early.

I know in the 05+ I4 engines, they are running 5w20. Call the dealership up, ask them.. they would know if there is any reprocussion to using a lighter weight out. there is also 0w20's out there made by mobil... Just some thoughts for you.

Maybe change the oil filter, maybe you got a bad one or something.
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Old 12-07-2009
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wait, you kept driving after the idiot gauge went to nothing?


Ford might as well not even have those gauges since they take almost no pressure to read 'normal'
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Old 12-07-2009
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It's not the oil pump. Anything that anyone could suggest at this point is just a guess. You need to hook up a mechanical guage to get an accurate reading. Does the engine make noise when the oil light is on? Without actually knowing what the oil pressure is when this happens, everything is a guess.
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Old 12-07-2009
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Originally Posted by TS6034 View Post
It's not the oil pump. Anything that anyone could suggest at this point is just a guess. You need to hook up a mechanical guage to get an accurate reading. Does the engine make noise when the oil light is on? Without actually knowing what the oil pressure is when this happens, everything is a guess.
I agree. If it's not ticking and tapping or whatever other type of noise it would make I'm pretty sure you have some type of pressure. If you don't want to hook up the mechanical gauge you could try the changing out the sending unit to see if that is your problem. I believe they are like $10 at your local parts store and easy to replace. Then cahnge your oil and see what happens. If this still doesn't fix it get the mechanical gauge.
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Old 12-07-2009
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Quote:
Originally Posted by rangerdanger01 View Post
i live in illinois and i've got the 2001 2.5l and it just started to get cold, but the last couple of days i left my house and the check engine light comes on and my oil pressure gauge reads zero for about 2 blocks. then it comes and goes for a minute and then its fine. i don't know if the cold has anything to do with it but the oil itself should be fine, i changed it like 2000 miles ago and there's 74,000 on the truck. any ideas?

Chances are it's your sending unit sensor. It's a COMMON problem with these units. Get a new one from the dealership (around $12ish bucks) and just replace it. My 01 had the same issues in cold weather until I replaced the sending unit. Not too sure where it's located on the 2.5L, on my 3.0L it's located on the passenger side where the engine meets the tranny bell housing.

I'm sure you'd find it, just do a search in here. GL
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Old 12-08-2009
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2nd the above, my 01 had the same problem
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Old 12-08-2009
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Quote:
Originally Posted by rangerdanger01 View Post
5w30 like it recommends, i'm thinking about going to 5w20 in case the pump is getting weak, and its a whopping 30 degrees outside anyway. usually i don't let it warm up but this has never happened before
that motor is suppose to take 5w20. only the 4.0l use 5w30
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Old 12-09-2009
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the data base in our autoshop at highschool says 5w30 as well as the sticker under the hood of my truck. it doesnt make any weird noises, but it if made a noise it would be a rod knocking and that means im throwing a v8 in there bc my current engine would be useless. and i tried letting it warm up but it made no difference and either way it runs fine right now so ill try replacing that sensor and see what happens
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Old 12-09-2009
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actually my buddy at school has a snap-on scanner so we'll see what it says before i do anything
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Old 12-10-2009
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Quote:
Originally Posted by rangerdanger01 View Post
yea 5 is the weight, but the 30 means winter, so when its cold its like a 30 weight until it warms up, that's how my auto teacher explained, so a 5w30 is thicker than a 5w20. the 20 would be a little bit thinner and hopefully easier on the pump

No, the "w" means winter, whether it be a 0w or a 5w for example. The 20, 30, 40, 50 that follows the w is not the "winter" part of the oil. Well, that's what I've always read and what I was always told.
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  #17  
Old 12-10-2009
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When you see a W on a viscosity rating it means that this oil viscosity has been tested at a Colder temperature. The numbers without the W are all tested at 210 F or 100 C which is considered an approximation of engine operating temperature. In other words, a SAE 30 motor oil is the same viscosity as a 10w-30 or 5W-30 at 210 (100 C). The difference is when the viscosity is tested at a much colder temperature. For example, a 5W-30 motor oil performs like a SAE 5 motor oil would perform at the cold temperature specified, but still has the SAE 30 viscosity at 210 F (100 C) which is engine operating temperature. This allows the engine to get quick oil flow when it is started cold verses dry running until lubricant either warms up sufficiently or is finally forced through the engine oil system. The advantages of a low W viscosity number is obvious. The quicker the oil flows cold, the less dry running. Less dry running means much less engine wear.

source
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  #18  
Old 12-10-2009
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A have a problem with my oil pressure gauge also. After a long distance drive on the highway, 2hr +, once I get on a regular road and come to a stop, it shakes up and down quickly. Is this gauge going bad, or the sensor? I've wondered whether the idiot gauge actually tells my pressure anyways, its always in the middle. I know fromy my classic car, the gauge that came with it goes up and down from 40 to 90 depending on if I'm idling or racing down the road. That gauge doesn't stay in the middle at all speeds. I don't want to add clutter to my cab by putting in an aftermarket gauge.
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Old 12-10-2009
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Quote:
Originally Posted by rangererv View Post
that motor is suppose to take 5w20. only the 4.0l use 5w30
NO!!!!!!!!! 5w20 came out around 2004-2005, pre 2004 vehicles do not use them

DO NOT USE 5w20 OIL IN ANY VEHICLE THAT DOES NOT REQUIRE IT!!!! IT IS MUCH TOO THIN!!!!!!!

someone else said the right answer, i'll re state it the first number and the letter (5w) states the cold viscosity rating, so when cold, the viscosity is thiner than when warm, as the oil flows better when warm, but it is thicker... 5w20 will not change how the oil reacts (compaired to 5w30) when it is cold, but when it is warm, and needs the oil the most, it is thin... you CAN get oils like 0w40, which would be better for a cold climate with a worn engine... i run 10w40 in my mustang all year, but where i used to live with it, very rarely got below freezing for more than about a week, and even when it did, it was only about 3 or 4 below

the low oil light, is a sensor in your oil pan, saying it doesn't feel any oil, which usually means you are low on oil... low oil pressure light means there is no pressure at the top end... this CAN be caused by a poor sending unit, but if it corrects it's self when it warms up, i doubt it's your sending unit, it's probably a worn oil pump, which is no real issue, just let it warm up 10 minutes first... until you have a problem where your oil pressure is next to nothing, when warm, it's nothing to worry about, and if you can't hear lifter noise, it's no problem, low oil pressure, doesn't mean no oil at the top end, it just means not as much as manufactures want, from the factory (which is much more than you NEED)
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Old 12-11-2009
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Many car companies will issue updated TSB's and make amendments to what was originally recommended on your engine labels and what is stated in the owner's manuals. My old 1998 and 2000 F150's required 5w-30, but now a TSB says 5w-20 is okay to use. Right now I'm using 0w-30, so I guess I'm ignoring some TSB's and what's on my oil cap - I plan on doing a UOA on this oil.
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  #21  
Old 12-12-2009
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yea the disk that had 2001 Ford's at our shop said i could run 5w20. its a little four-cylinder pickup truck, im not taking it drag-racing every weekend so its not gonna blow up because the oil i run is easier on the engine. I actually have 5w30 in there right now but i said i was thinking about switching to make it easier on the pump.
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Old 12-12-2009
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if your pump is worn out, it would be better to put thicker oil in, not thiner... the wear is the spaces inbetween the parts, all the tollerances between the parts, like con rod bearings, ect, are worn past the maximum space, same with the oil filter, to make sure the engine gets properly lubed, you should use a thicker oil, one that will fill the gaps, and sit on it, not just run off, as you don't need the thin water like oil to get into all the microscopic cracks (stock tollerances...)

and actually, now that i think about it, i lied above, i ran 10-40 in my car when i first got it, by the end, i was running 20-50 in the summer, and 15-40 in the winter (what diesel trucks use)
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