Burning oil with PP?

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Got 3K miles using Pennzoil Platinum 5w20 so far (5 week period). Checked oil yesterday and had to add about half quart. I don't remember burning oil with the Mobil 1 15w50. This is in my Ram 1500 with Hemi with 78K miles on it. I checked carefully for leaks. Is this normal for a lighter oil? I'm driving 2 hours a day. Not a lot of stop and go, about one third highway, 2 thirds 45 mph roads. Oil still a decent color.
 
Big viscosity difference from a 20wt to a 50Wt. I'd use what the truck was spec'd for which is probably a 30Wt oil. Sometimes when you change brands and grades you get some consumption which in time should go away.
 
15-50 may be too heavy and 5-20 may be too light. Try Mobil 1 5w30 Extended Performance. It holds it's Vis. for me very well even at 10,000 miles,or the Pennzoil Platinum 5w30.
 
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Some have noted consumption when changing to PP from another oil. Based on experiences on this forum it should decline with subesquent change intervals and stabilize. I've changed to PP and did not have any consumption. But you have thrown another variable into the subject by going from W50 to W20. I would go to the spec'd grade (if not 5W20) and give it another interval.
 
It should level off, it did in my brother's 07' F150(5.4). It consumed 1qt in 3K on its first run of Pennzoil Platinum 5w20, now about 1qt every 5K. This truck has consumed a quart of oil per OCI since new as well (PP, Motorcraft, M1), not sure why?

On a side note, I would go with a 5w30 as well.
 
I had slightly increased oil consumption with Pennzoil Platinum 5W-20 as compared to Mobil Clean 5000 5W-20. This consumption was only on long highway runs.
 
Stenerson, were you trying to go to a lighter oil for winter use? I'm trying to figure out why you went from a 50 weight to a 20 weight oil
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Funny you should write that oil consumption,I am facing something, I just realized after having two Mazdas never burning any oil ever my new Civic burned some Pennzoil Platinum 5w20 in a 4000 mi oci. This is the first time I used PP but the car only has 10,000 miles on it. Before that the oil was ff and Honda dino. No loss that I noticed in the other oils. So now having a Mazda with 135000 miles on it not burning any oil still running on Castrol Syntex and a Mazda 6 running on Edge not burning any oil a favorite PP is falling down on the job... Maybe a weak Noack rating????? So you are not alone..
 
My hypothesis on the sitution.

First run of the PP with the strong detergents may be cleaning the rings up where the heavier oil doidn't spend alot of time. The 5w20 travels in and out of the rings much better cooling the ring pack and carrying away contaminants. A life of 50wt may have starved the upper ring and carbon may have collected there. as the carbon is now being lubricted it is breaking up causing more oil to break to the top ring temporarily. AS the carbon deposits are reduced the consumption should subside.

Continue with Pennzoil Platinum 5w20 and the truck will run better in the long run. 15w50 has no place in a low tension ring pack.It won't even see the top ring. Carbonbabulous!
 
Originally Posted By: hate2work
Stenerson, were you trying to go to a lighter oil for winter use? I'm trying to figure out why you went from a 50 weight to a 20 weight oil
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Yep, giving it a shot for winter use. I heard many here say that vehicle spec'd for 5w30 could use 5w20 with no probs. I thought I'd give it a shot for 7k oci. But I'll definitely stick with 5W30 in future to be safe (since I have pan and engine heater now for the severe weather 5w30 may be overkill )



Originally Posted By: modularv8
I think it may be spec'd for 5w20 if you have MDS. It probably likes 50 wt after running it for the past 5 years.

I never had oil consumption with 5w20; always at the same level (5000 oci w/ '06 F150 5.4l MC5w20).


I've used the 50 wht since I bought it at 52K. It just hit 79.


Originally Posted By: Bryanccfshr
My hypothesis on the sitution.

First run of the PP with the strong detergents may be cleaning the rings up where the heavier oil doidn't spend alot of time. The 5w20 travels in and out of the rings much better cooling the ring pack and carrying away contaminants. A life of 50wt may have starved the upper ring and carbon may have collected there. as the carbon is now being lubricted it is breaking up causing more oil to break to the top ring temporarily. AS the carbon deposits are reduced the consumption should subside.

Continue with Pennzoil Platinum 5w20 and the truck will run better in the long run. 15w50 has no place in a low tension ring pack.It won't even see the top ring. Carbonbabulous!


Good info thx. I did a low mile cheap conventional oil ocis with MMO which seemed to do some cleaning as well as gunk flush during the oil change.
 
Originally Posted By: jcwit
I wouldn't consider 1/2 qt. in 3000 miles "burning" oil.


Especially if you have a manual trans and engine brake a lot.
 
Originally Posted By: EagleFTE
Some have noted consumption when changing to PP from another oil.


True, happened on my kids Honda CRV but abated after 2 OCI's Pennzoil Platinum 5w20.
 
My 01 Escape has had Motorcraft 5W20 since new. At 135k I went to change oil and discovered I was out of MC. I put in Pennzoil Platinum 5w20 from my Mustang GT stash and expected to see some oil usage even though I usually get none. After 3k, still no usage. I am wondering if the quality of the base oil in the MC and the add package is pretty compatible to the Grp 3 base and add pack of the PP.
 
I believe the 2004 Rams with a Hemi were supposed to use 10W30 and then they switched to 5W20 in later model years. I also do not see a reason to use a 20 weight oil when spec'd for a 30 weight.
 
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