Ford 7.3L Power Stroke (1999-2003) :: How Often Change Synthetic Oil


Nov 25, 2015

Mechanic at work told me to run 10-15 k.

My truck is my daily driver for work and such. Occasional 300 mile round trips to see family.

Last time I changed my oil was in June. And I've put about 6500 miles on it.

I run royal purple 15-40

I just not sure what to believe. Maybe someone has a link to an article ?

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Ford F-150 - 1997-2003 :: Auto Trans Fluid Change To Synthetic

The trans fluid appears to need to be changed. I do not know if it has been changed in the past as this 2001 F150 with a V6 truck is new to me and has 88K miles. I am wanting to drain the torque converter as well as drop the pan and change the filter. I am willing to take the risk of having to rebuild the transmission if the flush junks it up.

Three Questions:

1. Is there any issue with mixing the synthetic with ATF fluid as there would still be ATF in the cooler and other places unless I take it someplace and have it mechanically flushed?

2. Is there a way to determine if my 4R70W trans has a drain plug in the torque converter with out getting under there, looking thru the inspection port while some one is clicking the starter?

3. Is there any reason not to put a drain plug in the pan while it is uninstalled?

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Ford 7.3L Power Stroke (1999-2003) :: Oil Change Intervals?

If I switch to synthetic will I be able to stretch out my changes? Currently do it @ 5k miles with rotella triple, was thinking about trying T6 and extending changes to 8k miles

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Ford 7.3L Power Stroke (1999-2003) :: Ring And Pinion Change?

I have a 1999 7.3 psd F-450. It's rigged out for welding with a Lincoln SA-200 engine driven welder. My overall weight is approx. 11,500 lbs. and I rarely tow with it. It has a 4 speed automatic and 4.89 ratio gears in it now. I bought it with 245/70/19.5 tires. Stock size is 225/70/19.5. I am going broke trying to keep the fuel light from staying on all the time, and I am considering changing the gear ratio. My questions are; Is this a wise investment, as far as cost vs. gain? I also need to know if it may create a higher risk of other mechanical failures? I need to research what other ring and pinion ratios can be used in the ford 10.5 12 bolt rear axle. Money is hard to come by these days, and even harder to keep. I cannot afford a costly mistake if the funds can be more effective elsewhere.

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Ford 7.3L Power Stroke (1999-2003) :: 2006 - Change Brakes To Fit 16 Wheels?

Will it work? My ring and pinion is fubar and I found a 06 with 99K local. I know I would have to change the brakes to fit my 16" wheels...Anything else y'all can think of?

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Ford 7.3L Power Stroke (1999-2003) :: Glow Plug Change / Oil In Turbo

I'm getting ready to change the glow plugs in my dad's e99, 196k on the clock. When I pulled the air intake tubes I found some oil in the turbo:

The inlet tube also had a bunch of gunk in it too:

Does this look like it is caused by the PCVor is it a bigger issue?

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Ford 7.3L Power Stroke (1999-2003) :: Intermittent Crank With No Start After Oil Change

I did a bunch of reading before I bought this truck, and the seller said it really just needed a new battery as far as he could tell... When I bought it, I drove a considerable distance with no problems, other than it seeming to be a little sluggish with acceleration.

I have not seen any leaks anywhere, and all of the visible reservoirs appear to be nominal. No odd exhaust (really clean/invisible, in fact). No weird sounds, and running engine has a pretty even sounding cadence.

I initially changed all of the shocks because the old ones appeared to be original and were severely corroded/rusted. There is some surface rust elsewhere as this truck was apparently used in agricultural setting.

I replaced the battery and it was starting fine for a few weeks, but it would intermittently crank with no start, and would sometimes die within a few minutes after starting. I also charged the a/c with 134a, and it is blowing cold.

So... yesterday, I changed the oil, and installed a Fram Tough-Guard filter and precisely 15 quarts of oil (dipstick shows right level). I also changed the air filters, and disassembled and reassembled the air-cleaner to turbo hoses. While the hoses were disassembled, I took off the relays (AIH/GPR) and reinstalled an aftermarket GPR (crappy foreign-made one). No start. Several times. I reinstalled the original GPR. No start. Several times.

Even tried to jump it from my running Explorer. Still no start. (When I say no start, I mean that it will crank, but not turn over).

I am scheduled to take this truck into the dealership tomorrow for the recall issues (CPS), but I can't drive it there right now. Did I mess something up with the crappy GRP? Why wouldn't it start after reinstalling the original?

Another observation -- I had my batteries tested just now, and they are around 60%. I have ordered a new Alternator because this one looks original and is likely not charging the batteries. Still, I figured if I jumped it, it would start.

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Ford 7.3L Power Stroke (1999-2003) :: Injector Solenoid Color Change With Mileage?

Does the yellow injector solenoid cap change color with mileage and age?

I have a guy that has a set of injectors out of a truck that got scrapped. He's estimating mileage at 40k based on the fact that they caps are still yellow claiming that caps start to discolor around 60k and they get darker with miles/age.

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Ford 6.7L Power Stroke Diesel :: Leaking From Oil Pan Gasket When Used Synthetic

Having issue with synthetic oil (Rotella T6) causing leaks in the 6.7? I'm getting ready for my first oil change and I don't want to have an issue like I did with my 7.3 leaking from the oil pan gasket when I used synthetic.

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Ford 6.7L Power Stroke Diesel :: 2015 - Changing Oil From Conventional To Synthetic?

New diesel owner looking for some info? Currently approaching 9k miles. My first oil change was done by the dealer. I was looking at my owners manual on what weight of oil to use. I am thinking of going to a 5w-40 oil but all seems to be synthetic. Do i need to do anything special if i am going to change from a conventional to synthetic?

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Ford 6.7L Power Stroke Diesel :: MPG Increase With Synthetic Oil Or Adding A Tonneau Cover?

Is there a MPG gain with synthetic oil or adding a tonneau cover?

I'm planning on doing the tonneau but curious if any noticeable differences with either.

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Ford - Fusion :: 2010 - Oil Change / Synthetic Blend Required

My 2010 Fusion SE has 44,500 miles on it. It is the 4cyl. model with a 6 speed manual transmission. I have had the oil changed every 4-5,000 miles, never had any issues. Today when I went in to get the oil changed the guy told me a synthetic blend is required, and he wanted to charge me an extra 20 bucks for the oil change. I looked up in owners man. and it says SAE 5W20 and some Ford nomenclature for the minimum requirements for quality, etc. My question is this, why haven't any of my other oil changes required an up charge to a more expensive oil? I would have noticed. Does this car really need synthetic blend, and if so, is it really better than conventional oil? Have my previous oil changed damaged the car?

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Camry :: 2007 Smokes At Startup When Change From Conventional To Synthetic Oil

I have a 07 camry I4 with 56,900+ miles and it was using 10w30 conventional oil, but recently (2 weeks ago) I change it to 5w30 Mobil1 synthetic and today notice at start up white smoke, it didn't do this before with the conventional oil.

Is this normal with this type of change from conventional to synthetic or should I worry and try to go back to conventional and see if it stop.

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Ford 6.7L Power Stroke Diesel :: Change Oil Soon Light Came On After Only 2000 Mile Since Oil Change?

I had my oil changed at 40,000. I am at 42,500 right now . My " change oil soon light " . Seem like a little soon ! Plus I am 5 hours from home on a ski trip. I have checked oil level it fine. Will I be fine to drive it home 5 hours back to my local dealership for oil change? Or should I find a place up here? What would cause the light to come on so soon ? I am new to this truck . My old 7.3 did not have all the BS that this truck has .

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Ford 7.3L Power Stroke (1999-2003) :: Power Stroke Malfunction - In Reverse / With Lights On Engine Shut Off

Last November I forgot to plug my truck in and it got down to 0, my girlfriend tried unsuccessfully to jump start it. When I got home I jumped it and got it running. I took it down to a heated shop to troubleshoot the glow plug circuit. I discovered it was not getting 12v to the glow plug relay. Also I started it and tried to back it up in the shop, when put in reverse it killed the engine, not lugged it down it was like you shut the switch off.

Also I discovered if you turn the lights on it kills the engine immediately. It will not crank with the lights on either. So far I have replaced the computer,ignition switch,batteries, and cam positioning sensor. Now comes the weird part!! I decided to get it running and pull the bulbs out of the back up lights I pulled the drivers bulb first then the passengers side bulb. When I pulled the passengers side bulb it killed the engine.

It is not my daily driver so it still sits in my shop. I have a hunch it's a ground issue but I've checked and cleaned up all the grounds I can find and it still has the problem.

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Ford 7.3L Power Stroke (1999-2003) :: E350 - Sudden Power Loss / Zero Power

I am still failing to appropriately diagnose the problem(s) with my '03 Ford E-350 7.3L Powerstroke. This van has only 69,000 miles on it. A week or two back (just a few days back in work time) it suddenly went from running perfectly smooth, clean and wonderful to this:

- Zero power. Putting the van in gear and flooring the engine causes lots more smoke not nearly any rev of the engine and just a crawl forward.

- Lots of smoke out the back exhaust, whitish. I cannot discern wether it smells like diesel or oil (because I'm ignorant here), but the smell is very strong.

- After warming up and idling ~ 15 min I check under the coolant cap and see no signs of bubbling or disruption (from opening the cap in the coolant tank).

- After warming up there are no warning lights visible on the dash, and I don't have a computer to read codes (if there are any to read).

- I replaced the turbo up-pipes which had a visible leak previously. This did not hurt the symptoms, though no more visual leaks under the dog house.

- I thought maybe I put gasoline instead of diesel in the truck, not so.

- To do the above test I had to use the fuel pump to get gas out the tank to test. I hijacked the fuel pump output and turned the car on a few times to get gas out to a tank. The pump seemed to work just fine.

This was all very sudden which is perplexing, and, in use, the van was previously an ambulette and in my few miles with it (maybe 200-300 only) use was extremely light for such an engine/van, just driving around doing errands. I am not sure if this is relevant (no one has suggested so, yet) but before all this happened I uninstalled the rear HVAC that came with the van when I bought it. The AC lines were sealed under the hood. The coolant line was returned at the doghouse (you can see this at the beginning of the video).

At the moment the van has no power to go anywhere. I have not yet checked the CPS or IPC sensors, and understand this might be the next route in standard troubleshooting?

2003 Ford E 350 7.3L Trouble - YouTube....

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Ford 7.3L Power Stroke (1999-2003) :: Will Cluster From 2003 6.0L Work In 2002 Model?

I have a 2002 7.3L Screw 4x4. Will a 03/04 6.0L instrument cluster work in this truck? The 2 clusters appear identical. I put the 6.0 cluster in and the trans temp, and coolant temp gauge will not work. All the gauges sweep when it is powered on, but the coolant and trans temp lay flat, and the check gauge light is on. All other gauges and functions work. When I put my other cluster in, all gauges work fine. Is there a difference in the VSM, PCM, or the SCP communication?

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Ford 7.3L Power Stroke (1999-2003) :: 2003 F350 - Oil Leak When Parked After Running

I have a 03 F-350, 7.3L. There is a slow oil leak that only leaks after I've run the truck. In other words, it doesn't just sit and leak overnight. I'll park it after running, and the next morning I'll notice a small pool of oil, approximately 2" in diameter. The leak appears to be coming from the oil pan area. I degreased the entire oil pan area to get a better visual of where the leak is coming from. I can see oil trailing down the front of the oil pan and the rear of the oil pan. Does this sound like the gasket? Or, what else could it be? I'm praying its not as bad as I think and need to replace the gasket.

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Ford 7.3L Power Stroke (1999-2003) :: 2003 - Running Rough / 2 Cylinders Not Working Correctly

I have a 2003 F250 7.3L. I put new injectors in my truck four months ago and all of a sudden, I have 2 cylinders not working correctly, making the truck to run really badly. I sent the 2 injectors from the bad cylinders back for warranty and they replaced both of the injectors but nothing was wrong. I put them in and the truck still runs badly. I have a new fuel filter, new ICP, new CPS and glow plug relay. I cannot drive the truck, it smokes white at idle. I can unplug each injector at a time and cyclinder 5 does not change how the truck runs

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Ford 6.0L Power Stroke Diesel :: Engine Vibration And Less Power After Oil Change

I just had the Local Ford dealer perform an oil change. I noticed the motor running a tad different almost right away but put it off thinking it was something else going on. well i get several miles down the road and anytime i accelerate there is a noticeable vibration and little power. I also noticed that both my water temp and EOT were above 200*. I called the dealer and of course the service department had gone home for the day. I will be calling first thing tomorrow morning.

My drive from work to the dealer is well over 20 miles and at 60-65 my water never got above 189 and the EOT never got above 195. so after oil change water temp got to 205 and EOT was at 215 at the max. This is with no load going 55 mph on the hwy. I have a Ford Premium warranty on the truck as well and this is why I decided to have them do the oil change. they have done the previous oil change as well with no issues.

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Ford 7.3L Power Stroke (1999-2003) :: Loss Of Power / Rough Running

I have a 2001 ford 7.3l powerstroke diesel. When I first noticed the problem I was towing a trailer going up a grade and got into the throttle almost to the floor and noticed a loss of power and the service engine soon light flashing extremely rapidly a few times and never came back on. I made it home, still lacking power but not running rough. I drove the truck to work the next day and the truck was running rougher and loosing power. It ran great through lower RPM's but seemed to trip as soon as you gave it over half throttle. eventually the truck wouldn't run right at all and lacked complete power. It idled rough as well. My mechanic threw the computer on it and it said injector pressure reading too high or too low.

I was told to replace the IPR on the HPOP and I did. (I also replaced the fuel filter and changed the oil). After replacing the IPR it ran great, had full power! then it began to slowly die like it did before until it sounded like it was running off 4 cylinders again. I pulled the ipr out, cleaned it and changed the oil again. It seemed to clear it up for an hour and ran great but then began ran rough again. I also replaced the CPS sensor. I feel like its not getting enough fuel or something, im just wondering if it could be the ICP or the lift pump. There is no check engine light at all. Its just got me stumped because cleaning the IPR clears everything up.... temporarily.

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