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Adding heavy oil treatment changes oil viscosity? #5316306 01/08/20 02:06 AM
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Espada Offline OP
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I wanted to know if i add a heavy oil treatment like stp as my engine is burning oil " 500ml every 1000km " to 20w50 oil would that increase the viscosity like 30w60 or something like that or does it thicken in the gap areas in combustion chamber, as the weather now in Egypt is kinda cold " 6 Celsius to 12 Celsius maximum " and i am worried about the cold flow in such low temps even if the engine is consuming oil

Re: Adding heavy oil treatment changes oil viscosity? [Re: Espada] #5316347 01/08/20 05:20 AM
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1911CHAMPION Offline
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I've never had any success with any "oil treatment" successfully reducing oil consumption on an engine that is already consuming that much oil.

Can you provide some details on the vehicle and what oil you are using? I would NOT be using a 20W-50 weight in those temperatures. It's going to flow like gear lube...



Re: Adding heavy oil treatment changes oil viscosity? [Re: 1911CHAMPION] #5316356 01/08/20 05:44 AM
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Espada Offline OP
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Originally Posted by 1911CHAMPION
I've never had any success with any "oil treatment" successfully reducing oil consumption on an engine that is already consuming that much oil.

Can you provide some details on the vehicle and what oil you are using? I would NOT be using a 20W-50 weight in those temperatures. It's going to flow like gear lube...

I have a 98 Mitsubishi lancer with an engine that was badly rebuilt 😔

Re: Adding heavy oil treatment changes oil viscosity? [Re: Espada] #5316367 01/08/20 06:09 AM
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1911CHAMPION Offline
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What's the factory recommended oil viscosity for your year/make/model/engine?

And does it spec something different dependent on ambient temperature?



Re: Adding heavy oil treatment changes oil viscosity? [Re: Espada] #5316372 01/08/20 06:17 AM
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Espada Offline OP
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Originally Posted by 1911CHAMPION
What's the factory recommended oil viscosity for your year/make/model/engine?

And does it spec something different dependent on ambient temperature?


Its okay to use 20w50 as temp never go lower than 6 Celsius as per the manual but does the oil treatment increase the viscosity to higher number?

Screenshot_2020-01-08-14-15-46-198_com.google.android.apps.docs.jpg
Last edited by Espada; 01/08/20 06:17 AM.
Re: Adding heavy oil treatment changes oil viscosity? [Re: Espada] #5316376 01/08/20 06:20 AM
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Imp4 Offline
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Originally Posted by Espada
I have a 98 Mitsubishi lancer with an engine that was badly rebuilt 😔

No engine treatment will fix a poorly rebuilt engine.
Only an additional rebuild will fix it.


2001 Mitsubishi Galant 2.4 - 165k+
Grandma's creampuff...
Re: Adding heavy oil treatment changes oil viscosity? [Re: Imp4] #5316381 01/08/20 06:26 AM
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Espada Offline OP
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Originally Posted by Imp4
Originally Posted by Espada
I have a 98 Mitsubishi lancer with an engine that was badly rebuilt 😔

No engine treatment will fix a poorly rebuilt engine.
Only an additional rebuild will fix it.

Nah won't do that trying to prolong the life of the engine i have now untill it dies then i will get a 1500cc short block and throw the old one till then i am trying to save the engine oil as much as i can

Re: Adding heavy oil treatment changes oil viscosity? [Re: Espada] #5316420 01/08/20 07:20 AM
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Donald Offline
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Originally Posted by Espada
I wanted to know if i add a heavy oil treatment like stp as my engine is burning oil " 500ml every 1000km " to 20w50 oil would that increase the viscosity like 30w60 or something like that or does it thicken in the gap areas in combustion chamber, as the weather now in Egypt is kinda cold " 6 Celsius to 12 Celsius maximum " and i am worried about the cold flow in such low temps even if the engine is consuming oil


I would work on the reason for oil burning vs trying to stop it with a heavy weight oil.


2015 Ford F-250 w/Powerstroke
2016 Subaru Crosstrek CVT (wife's)
Re: Adding heavy oil treatment changes oil viscosity? [Re: Espada] #5316430 01/08/20 07:26 AM
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gfh77665 Offline
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Originally Posted by Espada

Nah won't do that trying to prolong the life of the engine i have now untill it dies then i will get a 1500cc short block and throw the old one till then i am trying to save the engine oil as much as i can


I agree with your strategy. The advice some give to "rebuild it again" is not particularly practical.

Try the 20-50. It may or may not work. Try the STP too. My favorite for worn engines is "Restore". Its a proven product.

Re: Adding heavy oil treatment changes oil viscosity? [Re: gfh77665] #5316548 01/08/20 08:54 AM
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Espada Offline OP
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Originally Posted by gfh77665
Originally Posted by Espada

Nah won't do that trying to prolong the life of the engine i have now untill it dies then i will get a 1500cc short block and throw the old one till then i am trying to save the engine oil as much as i can


I agree with your strategy. The advice some give to "rebuild it again" is not particularly practical.

Try the 20-50. It may or may not work. Try the STP too. My favorite for worn engines is "Restore". Its a proven product.

Finally someone that understand my point of view but its okay to use 20w50 with heavyweight oil treatment? Talking about oil flow at start up, And I don't have that item called " restore " in Egypt unfortunately i have to stick with STP

Re: Adding heavy oil treatment changes oil viscosity? [Re: Espada] #5316721 01/08/20 11:55 AM
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I had an Isuzu 1.8 liter in a 1980 Chevy Luv....

It burned so much oil, a quart every 25 miles - All I ever put in was thick goop, VERY SELDOM ever added "engine oil"

I drove it that way for 2 years, even in Montana winters below 0*C

It still ran perfect when I sold it.

You can try your idea - if it works, no harm was done.


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: Adding heavy oil treatment changes oil viscosity? [Re: Espada] #5316768 01/08/20 12:40 PM
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I used STP in a beat up bad rebuild Chevy box truck 20 years ago definitely slowed down consumption I would definitely try it. I'm guessing In Egypt it's pretty hot year round so start up concerns less concerning.


2007 G6 beater.2012 E450 box truck. 2018 Chevy Traverse.2017 E450 box truck.2017 Chevy 3500 extend cargo van.
Re: Adding heavy oil treatment changes oil viscosity? [Re: Espada] #5316770 01/08/20 12:42 PM
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gfh77665 Offline
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Originally Posted by Espada

Finally someone that understand my point of view but its okay to use 20w50 with heavyweight oil treatment? Talking about oil flow at start up, And I don't have that item called " restore " in Egypt unfortunately i have to stick with STP


I don't know the exact answer but I believe with the Egypt climate, yes, the STP is OK to use. The only time I would not use STP would be if I lived in a very cold climate. The STP will not be much thicker than the 20-50 anyway, so you do not risk much since the viscosity change will not be a very great difference.

Re: Adding heavy oil treatment changes oil viscosity? [Re: gfh77665] #5316849 01/08/20 02:19 PM
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Originally Posted by gfh77665

I don't know the exact answer but I believe with the Egypt climate, yes, the STP is OK to use.


Cairo is on the same latitude as New Orleans; record low in Cairo is 34*F, record high is 118*F. It's been significantly colder in New Orleans, however. Just a reference since we don't know where in Egypt OP is at.


De omnibus dubitandum.
Re: Adding heavy oil treatment changes oil viscosity? [Re: Espada] #5316886 01/08/20 03:14 PM
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Dave1027 Offline
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Sometimes going with a heavier oil or a thick oil treatment can be the wrong thing to do on an oil burner. It all depends on why the engine is burning oil. Sometimes the ring groves get caked up and don't allow the rings to seal properly. In this case you would need an oil with greater cleaning ability such has a diesel oil. Also may help to go with a lower viscosity to help dissolve the sludge.

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