[TylerDurden]

Worst mod to a powerstroke with an heui system? Dino oil.

Run some 5w40 SYNTHETIC. I have tried several in the last couple year. Valvoline 5w40(cummins blue) synthetic or mobil1 5w40 turbodiesel. 265k miles(first 230 were dino oil). I have STOCK ad injectors. One was changed at 25kmiles. My truck doesnt smoke like the inj's are fukked either. I used to plug the truck in until two years ago. I put Mobil1 in and parked my truck out by the barn and forgot to put it away that night. Next morning,hit the glowplugs and the truck started. No romp. No violent cold start noises. My truck has 265k miles on it. My trucks lifted, uncorrected speedo, so Im closer to 300k miles. I dont EVER plug my truck in anymore. Last winter two weeks straight of double digits below zero and the truck starts with a simple gp cycle. If thats not worth $25/gallon IDK what to tell you guys. You'd save that much in electricity from plugging the sumbitsh in.

 

[TylerDurden]

The HPX line will also help some... But a low viscosity oil is the key... {A warm viscosity oil is even better}... But you can't always plug your truck in...

Your post is pretty accurate in what the oil does for an heui system in cold temps. 5w40 is not low or lower viscosity than 15w40. They are both 40weight oils. One has a lower pour point than the other. 5w40 has a lower pour point than the other.

When the engine heats the oil up to 230 degrees they are both 40wt oils.

 

[chadder1313]

what kind of oil are u runnin ?

15w40 Rotella.

Yeah I agree the 7.3 vs Cummins 5.9 isnt apples to apples when it comes to fuel systems. Well it looks like I will be switching to synthetic from here on out.

 

[Motomez]

Hello i have a 00 7.3l with 220.000 miles whenever it sits long enough to get cold it romps sometimes a couple times and others real bad to where it dies any one have any ideas? Any help is greatly appreciated..thank you

I just had the same problem with mine and it turned our to be a regulator for the injection system. I had a tech scan the system and it was throwing a few ipc codes. It now runs like a champ

 

[00POWERSTROKE777]

I just had the same problem with mine and it turned our to be a regulator for the injection system. I had a tech scan the system and it was throwing a few ipc codes. It now runs like a champ

well i just got the oil to do the oil change yesterday im gonna try the 15-40 first and if its still doin this sh** then ill go with a lower viscosity oil or synthetic and if all fails ill take it back to my buddy at the dealer and have him check the injection system...

 

[rufushusky]

well i just got the oil to do the oil change yesterday im gonna try the 15-40 first and if its still doin this sh** then ill go with a lower viscosity oil or synthetic and if all fails ill take it back to my buddy at the dealer and have him check the injector pump...

He ain't gonna find anything...you don't have an injector pump like a VP44, P-7100 or CP3. You have an HPOP which provides the oil pressure to fire the injectors but the injector do the work of pushing the fuel into where it goes boom. See how the 15w-40 w/o Lucas does, if that doesn't work try a 10w-30 or a synthetic. I fired my truck up yesterday at 11*f and this morning at 6*F, neither day was it plugged in and not a romp to be found.

 

[00POWERSTROKE777]

He ain't gonna find anything...you don't have an injector pump like a VP44, P-7100 or CP3. You have an HPOP which provides the oil pressure to fire the injectors but the injector do the work of pushing the fuel into where it goes boom. See how the 15w-40 w/o Lucas does, if that doesn't work try a 10w-30 or a synthetic. I fired my truck up yesterday at 11*f and this morning at 6*F, neither day was it plugged in and not a romp to be found.

lol yea i know i tried to edit it after i realized what i wrote.... thanks tho...

 

[SyN]

Tyler: with all do respect in my eyes... The 5W-40 is a lower Viscosity oil then the thick 15W-40... Yes they are both 40wt that is easy to see... and once heated up to operating temp they are supposedly the same... Well hearing and feeling is the difference... Not to scientific but it's what really matters...

Within my 7.3L I can feel the difference between both the oils once reaching operating temp... my 7.3L feels sluggish even once at operating temp with 15W-40 {Delo} seemed to be the worst...Even though it has proven to be a great robust oil... And @ idle it was a real difference... Now once the 5W-40 was introduced {7.3L} was a totally different animal... Right from the start I and the wife noticed a difference... Sound & Feel... I know I know what your saying... and I highly respect your opinion... And for the record--> I know every 7.3L will react differently to minor/simple changes...

But in my mind I will always call a 5W-40 a lower viscosity then a 15W-40...

It might not be scientifically correct...But then again I am not a scientist...

Thank you for bringing that point up though... so others will not do as I do... Might make them look a bit ignorant... :->


00POWERSTROKE777: rufus gives ya good advice... before your mechanic touches you 7.3L do the switch to either 10W-30---T5 is a semi-synthetic or Amsoil 10W-30{Great Oil} or a 5W-40 synthetic... I'll bet your cold morning romping issues will vanish. Sorry even a HDEO Dino 10W-30 will do the trick...

 

[00POWERSTROKE777]

Tyler: with all do respect in my eyes... The 5W-40 is a lower Viscosity oil then the thick 15W-40... Yes they are both 40wt that is easy to see... and once heated up to operating temp they are supposedly the same... Well hearing and feeling is the difference... Not to scientific but it's what really matter...

Within my 7.3L I can feel the difference between both the oils once reaching operating temp... my 7.3L feels sluggish even once at operating temp with 15W-40 {Delo} seemed to be the worst...Even though it has proven to be a great robust oil... And @ idle it was a real difference... Now once the 5W-40 was introduced {7.3L} was a totally different animal... Right from the start I and the wife noticed a difference... Sound & Feel... I know I know what your saying... and I highly respect your opinion...

But in my mind I will always call a 5W-40 a lower viscosity then a 15W-40...

It might not be scientifically correct...But then again I am not a scientist...

Thank you for bringing that point up though... so others will not do as I do... Might make them look a bit ignorant... :->


00POWERSTROKE777: rufus gives ya good advice... before your mechanic touches you 7.3L do the switch to either 10W-30---T5 is a semi-synthetic or Amsoil 10W-30{Great Oil} or a 5W-40 synthetic... I'll bet your cold morning romping issues will vanish. Sorry even a HDEO Dino 10W-30 will do the trick...

yea rufus has been alot of help knows what he is talkin about ....on the other topic tho i would have said the same thing 5w-40 is a lighter weight oil than 15w-40 when cold...

 

[tbolt]

It is lighter @ different temps, that's the key.

 

[00POWERSTROKE777]

It is lighter @ different temps, that's the key.

thats the whole point for a multi-viscosity oil is to be thinner cold and thicker warm...but u know how us men can be lol :blah:

 

[rufushusky]

Tyler: with all do respect in my eyes... The 5W-40 is a lower Viscosity oil then the thick 15W-40... Yes they are both 40wt that is easy to see... and once heated up to operating temp they are supposedly the same... Well hearing and feeling is the difference... Not to scientific but it's what really matters...

Within my 7.3L I can feel the difference between both the oils once reaching operating temp... my 7.3L feels sluggish even once at operating temp with 15W-40 {Delo} seemed to be the worst...Even though it has proven to be a great robust oil... And @ idle it was a real difference... Now once the 5W-40 was introduced {7.3L} was a totally different animal... Right from the start I and the wife noticed a difference... Sound & Feel... I know I know what your saying... and I highly respect your opinion... And for the record--> I know every 7.3L will react differently to minor/simple changes...

But in my mind I will always call a 5W-40 a lower viscosity then a 15W-40...

It might not be scientifically correct...But then again I am not a scientist...

Thank you for bringing that point up though... so others will not do as I do... Might make them look a bit ignorant... :->


00POWERSTROKE777: rufus gives ya good advice... before your mechanic touches you 7.3L do the switch to either 10W-30---T5 is a semi-synthetic or Amsoil 10W-30{Great Oil} or a 5W-40 synthetic... I'll bet your cold morning romping issues will vanish. Sorry even a HDEO Dino 10W-30 will do the trick...

I think he is thinking kinematic viscosity (the basis for operating weights aka the second number of a multi-weight oil), while you are talking dynamic viscosity (the basis for the XXw rating.) So good news your both right

Oh yeah, don't give me too much credit...I only know what I know from breaking stuff.

 

[00POWERSTROKE777]

I think he is thinking kinematic viscosity (the basis for operating weights aka the second number of a multi-weight oil), while you are talking dynamic viscosity (the basis for the XXw rating.) So good news your both right

Oh yeah, don't give me too much credit...I only know what I know from breaking stuff.

lol i give credit when credit is deserved havent heard no bullsh** from u so just take it...

 

[toypuller]

My buddy replaced his exhaust backpressure sensor and cleaned the tube going to exhaust manifold. He did this by using a peice of weed eater string in a drill putting it down the tube and drilling basically to clean the insides of the tube out. It CURED the romping completly

 

[00POWERSTROKE777]

My buddy replaced his exhaust backpressure sensor and cleaned the tube going to exhaust manifold. He did this by using a peice of weed eater string in a drill putting it down the tube and drilling basically to clean the insides of the tube out. It CURED the romping completly

correct me if im wrong but that doesnt make too much sense to me what would the exhaust backpressure sensor have to do with romps??

 

[Ron's power stroke]

i run 15/40 delo year round and my truck doesnt even know what a romp is even at -20 start up...we have a tow truck with a 7.3 running rotela 15/40 and that thing romps bad at 20* or lower,,,

 

[SyN]

Ya know... Maybe...Just Maybe... This romping issue might have more to do with the condition of the injectors and the HPOP? As well as the Viscosity of the Oil within the system? But Maybe the actual condition of the components of system have more to do with this issue...

I don't know! All I know is... Just changing from the very thick 15W-40 to a 5W-40 or 10W30 makes a big difference with this issue...

 

[kilapapipa]

Ya know... Maybe...Just Maybe... This romping issue might have more to do with the condition of the injectors and the HPOP? As well as the Viscosity of the Oil within the system? But Maybe the actual condition of the components of system have more to do with this issue...

I don't know! All I know is... Just changing from the very thick 15W-40 to a 5W-40 or 10W30 makes a big difference with this issue...

Bingo, injectors play a part after 100k. I am still using 15w-40 dino after the rebuild for another few thousand miles until switching to synthetic but the remanded injectors cured the romps I used to have without plugging in. Also had my hpop modded so that could be in the equation as well but I truly think injectors with miles on them play a big part.

All of this said though, the thinner the oil at startup in cold weather, the better the start.

 

[kilapapipa]

i run 15/40 delo year round and my truck doesnt even know what a romp is even at -20 start up...we have a tow truck with a 7.3 running rotela 15/40 and that thing romps bad at 20* or lower,,,

Do the OBS trucks have this issue? Is it related to the hybrid singles you have in your truck. Mine starts easier and maybe it is relted to single shots vs. splits I used to have????????????????

 

[Ron's power stroke]

i dont think so...my truck has never romp even with stock sticks..the tow truck is a 1999 IH..i think it has singles as well and it romps bad...its called the high TQ T444E