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Synthetic Blend help with consumption? #4527404
09/27/17 09:22 AM
09/27/17 09:22 AM
Joined: Jun 2009
Posts: 103
Nashville, TN, United States
Mossyoakglock Offline OP
Mossyoakglock  Offline OP
Joined: Jun 2009
Posts: 103
Nashville, TN, United States
I have a 2008 Silverado w/ 5.3 and slight oil consumption issues (like most of them). Would running Pennzoil 5w-30 Syn Blend help with consumption at all? If I ready the PDS right it looks like it is a little thicker at temp than the full synthetic. Would there be any benefit to running a blend over a full synthetic? Truck has 125,000 on it.

The synthetic cSt @ 40 is 10.3 and the blend is 11.


2008 Chevrolet Silverado
5.3L / 4L60E
Re: Synthetic Blend help with consumption? [Re: Mossyoakglock] #4527413
09/27/17 09:29 AM
09/27/17 09:29 AM
Joined: Apr 2004
Posts: 7,740
New York
pbm Offline
pbm  Offline
Joined: Apr 2004
Posts: 7,740
New York
It could go either way...it could consume more, less or the same using syn-blend. I'd try a High Mileage oil, rather than a syn-blend, to see if the seal conditioners help....


'Journalism is Dead'
Re: Synthetic Blend help with consumption? [Re: Mossyoakglock] #4527417
09/27/17 09:34 AM
09/27/17 09:34 AM
Joined: Jun 2003
Posts: 17,354
Deplorable in apple valley, ca
Chris142 Offline
Chris142  Offline
Joined: Jun 2003
Posts: 17,354
Deplorable in apple valley, ca
How many miles per qt is it using?


02 Wrangler durablend 10w40
87 F250 traveler 15w40
04 Tahoe super-s 10w30
Z400 castrol T 10w40
Can am maveric edge 5w40
57 case tractor 15w40
Re: Synthetic Blend help with consumption? [Re: Mossyoakglock] #4527443
09/27/17 10:14 AM
09/27/17 10:14 AM
Joined: Mar 2008
Posts: 5,943
Michigan
ZZman Offline
ZZman  Offline
Joined: Mar 2008
Posts: 5,943
Michigan
What is slight consumption? Many manufacturers consider some consumption normal.


2003 Mercury Grand Marquis. Rotella T6 Multi-Vehicle oil
2008 Sebring Hardtop convertible. Rotella T6 Multi-Vehicle oil
2006 Kawasaki Vulcan 900 LT. Amsoil Metric 10w-40
Re: Synthetic Blend help with consumption? [Re: Mossyoakglock] #4527446
09/27/17 10:18 AM
09/27/17 10:18 AM
Joined: Mar 2008
Posts: 5,943
Michigan
ZZman Offline
ZZman  Offline
Joined: Mar 2008
Posts: 5,943
Michigan
Bad PCV valve?
Worn valve guides?
Sticking rings?
Hard to say if it will help or not.


2003 Mercury Grand Marquis. Rotella T6 Multi-Vehicle oil
2008 Sebring Hardtop convertible. Rotella T6 Multi-Vehicle oil
2006 Kawasaki Vulcan 900 LT. Amsoil Metric 10w-40
Re: Synthetic Blend help with consumption? [Re: Mossyoakglock] #4527454
09/27/17 10:30 AM
09/27/17 10:30 AM
Joined: Apr 2017
Posts: 947
SF BAY AREA, CA
dogememe Online content
dogememe  Online Content
Joined: Apr 2017
Posts: 947
SF BAY AREA, CA
Have you tried using an AFM Range Disable?? https://rangetechnology.com/afm-disabler/

From what I'm heard the AFM/DOD system is responsible for most problems with these engines including oil consumption.


2007 Crown Vic P71 4.6 ~126K Miles, Royal Purple HPS 5W-30, Royal Purple Filter, Daily Driver, 5K OCIs.
2010 Escape FWD 2.5 ~84K Miles, Castrol Edge EP 5W-30, Wix Filter, Rented on Turo, 10-15K OCIs.
Re: Synthetic Blend help with consumption? [Re: Mossyoakglock] #4527473
09/27/17 10:59 AM
09/27/17 10:59 AM
Joined: May 2006
Posts: 4,013
Central Wisconsin
dwendt44 Offline
dwendt44  Offline
Joined: May 2006
Posts: 4,013
Central Wisconsin
You could try a 10W-30 oil and see if that helps.
Tennessee doesn't get that cold in winter, not likely to
see single digits on the thermometer.


My 2


There's no such thing as:
Too big of a battery,
Too large of a gas tank,
or too loud of a horn,
or too bright headlights.
Re: Synthetic Blend help with consumption? [Re: Mossyoakglock] #4527526
09/27/17 11:54 AM
09/27/17 11:54 AM
Joined: Apr 2016
Posts: 1,185
Campbellsville, KY
Alex_V Offline
Alex_V  Offline
Joined: Apr 2016
Posts: 1,185
Campbellsville, KY
I've put Valvoline Maxlife 10w30 in several LS-powered trucks and tens of thousands of miles later (not on the same OCI laugh ) they're still doing just fine. I wouldn't hesitate at all to put in something along those lines and see how it does.


I like Chevy and Valvoline.

'13 Cruze, 1.4T, 113K
'85 GMC C3500, 454, 130K
'82 Mercedes 300CD, OM617 turbo, 169K
'67 Suburban, 350, 331K
Re: Synthetic Blend help with consumption? [Re: Mossyoakglock] #4527590
09/27/17 01:08 PM
09/27/17 01:08 PM
Joined: Feb 2011
Posts: 6,719
Hudson, NH
LeakySeals Offline
LeakySeals  Offline
Joined: Feb 2011
Posts: 6,719
Hudson, NH
Tell us about prior maintenance. Oil changed on time? What kind of oil was used? Knowing that, perhaps a synthetic clean up may help with stuck rings. If the engine is clean and all oil changes were done on time I would try replacing the valve cover with built in PCV. Go read about it in the Amazon reviews some claim it completely stopped.


06 Escalade 6.0L LQ9 AWD 165k M1 5w30
03 Maxima 3.5L POS 152k ST HM 10w30
Re: Synthetic Blend help with consumption? [Re: Mossyoakglock] #4527672
09/27/17 03:02 PM
09/27/17 03:02 PM
Joined: Jun 2009
Posts: 103
Nashville, TN, United States
Mossyoakglock Offline OP
Mossyoakglock  Offline OP
Joined: Jun 2009
Posts: 103
Nashville, TN, United States
To answer all questions at once:

How many miles per qt is it using? - not exactly sure. I check it regularly so not sure how much it's using per 1,000 miles. I'd say around a quart (maybe less).

Have you tried using an AFM Range Disable?? https://rangetechnology.com/afm-disabler/ - I was using the Range but the truck would randomly go back to V4 mode so I ditch it. I went with a tuner and disabled it that way. I didn't do it until around 60K miles so the damage was probably already done at that point.

Tell us about prior maintenance. Oil changed on time? What kind of oil was used? Knowing that, perhaps a synthetic clean up may help with stuck rings. If the engine is clean and all oil changes were done on time I would try replacing the valve cover with built in PCV. Go read about it in the Amazon reviews some claim it completely stopped - Oil always changed based on OLM (maybe a little before or a little after) but usually around the 6,000 mile mark. Always used Synthetic. Used M1 for the first 2-3 years then went with PP. Tried Valvoline but truck didn't like it. Now using M1 Extended. I also replaced the valve cover with the updated cover based on the GM TSB.

I thought about going with a HM oil (most likely Pennzoil) but not sure if I want to because I've never read a definite answer that you can or cannot go back to non-HM after using it.

Also, after thinking about it would it really make a difference between an 10w and 5w since they are both the same at operating temps? Also, we can get into the low 10's and even in he singles here during the winter (which we have the last few years). We just don't get the snow.

Last edited by Mossyoakglock; 09/27/17 03:13 PM.

2008 Chevrolet Silverado
5.3L / 4L60E
Re: Synthetic Blend help with consumption? [Re: Mossyoakglock] #4527702
09/27/17 04:02 PM
09/27/17 04:02 PM
Joined: Feb 2008
Posts: 4,727
Texas
FZ1 Offline
FZ1  Offline
Joined: Feb 2008
Posts: 4,727
Texas
Worth a try.

Re: Synthetic Blend help with consumption? [Re: Mossyoakglock] #4527706
09/27/17 04:08 PM
09/27/17 04:08 PM
Joined: Jan 2008
Posts: 10,679
OH
SatinSilver Offline
SatinSilver  Offline
Joined: Jan 2008
Posts: 10,679
OH
Seems as though you like Pennzoil so why not use some Pennzoil conventional oil in it? It's full of additives for cleaning and maybe the best thing for it. I'd just skip over the syn-blend and go right to the conventional. And this is coming from someone that runs full syn in one car and a syn-blend in the other.

Re: Synthetic Blend help with consumption? [Re: SatinSilver] #4527714
09/27/17 04:17 PM
09/27/17 04:17 PM
Joined: Feb 2008
Posts: 4,727
Texas
FZ1 Offline
FZ1  Offline
Joined: Feb 2008
Posts: 4,727
Texas
Good idea.

Re: Synthetic Blend help with consumption? [Re: Mossyoakglock] #4528043
09/28/17 12:13 AM
09/28/17 12:13 AM
Joined: Jun 2009
Posts: 103
Nashville, TN, United States
Mossyoakglock Offline OP
Mossyoakglock  Offline OP
Joined: Jun 2009
Posts: 103
Nashville, TN, United States
Because I don't know the ins and outs of oil specifications, properties, etc and I'm just curious. What would be the reason to try conventional over synthetic? Better cleaning and seal conditioners over synthetic?


2008 Chevrolet Silverado
5.3L / 4L60E
Re: Synthetic Blend help with consumption? [Re: Mossyoakglock] #4528208
09/28/17 08:19 AM
09/28/17 08:19 AM
Joined: Feb 2011
Posts: 6,719
Hudson, NH
LeakySeals Offline
LeakySeals  Offline
Joined: Feb 2011
Posts: 6,719
Hudson, NH
I have the 6.0L. Using M1 5w30 I "lose" 1/4-1/3 qt during a 6500 OLM OCI. I say lose because it doesn't seem like I'm consuming it necessarily but the area around the oil pan and filter seems to be wet. I recently tried Edge black bottle and saw no drop on the stick, none. And it remained dry underneath. So it would seem like M1 finds way out of engine beyond standard consumption. so I guess the first test would be changing synthetics. See if that makes a difference. if changing synthetics makes no difference after a couple of oil changes then go the high mileage route. High mileage oil can help with tired rubber seals throughout the engine

I stay with M1 and the slight consumption because of butt Dino smoothness during the OCI. Starts getting a little sluggish and rough with other brands like Pennzoil and Castrol. Again that's just butt Dino personal preference with this particular engine.


06 Escalade 6.0L LQ9 AWD 165k M1 5w30
03 Maxima 3.5L POS 152k ST HM 10w30
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