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5.3L V8 oil consumption milage issues
LSF Member
Joined:
05/09/2012
From Hibbing, MN
Posts: 1703
How many of you are getting to see high miles on your Chevrolet 2007 5.3L V8 with the oil consumption issues caused by the Active Fuel Management system.

I've currently got 93,000 miles on my 5.3L and I'm about a quart low every 2,000 miles.

Does just adding oil as needed and changing the oil every 3,000 miles keep the engine going just fine? Doesn't that oil end up somewhere and cause problems? Tips and advice are appreciated.

Posted on: 2015/12/28 18:13
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Re: 5.3L V8 oil consumption milage issues
LSF Member
Joined:
02/28/2005
Posts: 3286
Here is a video on the issue.

https://www.youtube.com/watch?v=hNyNDTbaTDo

Posted on: 2015/12/28 19:09
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Re: 5.3L V8 oil consumption milage issues
LSF Member
Joined:
11/28/2005
From Savage, MN
Posts: 293
This is a KNOWN issue for GM. Has been for years. The '06 through '10 were notorious for this. Known fixes are: replacing the pistons and rings, replacing the valve guides, replacing the entire engine OR just selling the truck outright. This also happens to be the number one reason why I avoided buying a GM truck with a 5.3 Liter in it. I love GM products but why they got rid of their "bullet proof" 5.7 liter was beyond me.

Posted on: 2016/1/11 14:12
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Re: 5.3L V8 oil consumption milage issues
LSF Member
Joined:
12/03/2007
From Faribault, MN
Posts: 206
My 2008 5.3L Silverado had the entire top end of the motor replaced around 40K miles because of this exact issue - and then started having issues again around 130K.

Admittedly, I am only 36K miles into my 2014 5.3L Silverado - but thankfully (knock on wood), no issues at all with this truck so far.

Posted on: 2016/1/11 14:19
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Re: 5.3L V8 oil consumption milage issues
LSF Member
Joined:
02/05/2014
From In Depth Outdoors
Posts: 741
I traded my '07 in two years ago. It had 38k on it when I traded. Heard through the grapevine the engine blew on it less than a yr after it was traded. may have been from this? I never had any motor troubles with it that I noticed.

Posted on: 2016/1/11 19:28
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Re: 5.3L V8 oil consumption milage issues
LSF Member
Joined:
04/15/2012
From Central Mn
Posts: 17
As stated by other its a known problem with those years. The active fuel management drops 4 cylinders. When they quit firing the oil control rings eventually carbon up and bind in the grooves. Once this happens they no longer wipe the cylinders of oil so when they do fire it burns the oil that wasn't wiped from the cylinder wall. Oil consumption. Your headed for a rebuild at some point. Just had a 2008 Silverado done but they provide a warranty since the mileage was low. But, they had to document the consumption also.

Posted on: 2016/1/17 20:12
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Re: 5.3L V8 oil consumption milage issues
LSF Member
Joined:
12/08/2013
From Spicer Area
Posts: 359
Be a lot cheaper to just add some oil! If it's consistent on the oil consumption it's pretty easy to regulate. As far as the 5.7 liter also had major issues of cold knocking too. I have had several Chevy vehicles and there has been certain ones that are a quart low at oil change and have ran fine. Other oil consumption issues can be cause by bad valve covers in which they have recalls for also.

Posted on: 2016/1/18 22:06
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Re: 5.3L V8 oil consumption milage issues
LSF Member
Joined:
03/08/2008
From East Bethel
Posts: 341
I had the 6.0 in my 07 with no issues but like you MN01GXE my 14 Silverado has had that issue but I have noticed that when I take longer trips and the FMS kicks it down to 4 cylinders, the oil life goes faster...?

Posted on: 2016/1/18 22:09
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Re: 5.3L V8 oil consumption milage issues
LSF Member
Joined:
07/31/2007
From central mn
Posts: 4538
Well a little insight on this issue,1st off 1qt of oil every 2k miles isn't much consumption,no worries,further this consumption issue started in 2007 and only with the new cast aluminum block 5.3 engine in the new body style truck,maybe 1 in 5 engines had consumption issues and were addressed up to 2009 and coverd by GM's 5yr/100k powertrain warrenty,further this consumption issue rasied a "bulletin" not a recall as its not a safety issue so don't be confused by here-say.Remember GM had two 2007 body styles,the old body style was called the classic Silverado,the 5.3 engine was cast iron and none active fuel mgmt.,great engine...More Hp and torq than the old 5.7lit and better fuel economy.

By 2010 GM recommended desox1 engine oil (semi synthetic) for better lubracation to address consumption issues from day one,fast forward to 2016 we haven't had any consumption issues to date in our area that I'm aware of since 2009,not going to say problem solved by 2010 but certainly rained it in.

If you are thinking of purchasing a used chevy/gmc 1500 pu with a 5.3lit engine from 2007 (new body style ) to 2010 make sure you review "carfax" on said truck,oil consumption tests performed by the dealer will showup,trucks with known consumption issues taken in by the dealer also gave the pervious owner cash incentives to trade said vehicle along with any and all consumer rebates.

PS~ ZERO issues with the 6lit cast iron block engines.(HD trucks)

Posted on: 2016/1/19 12:08
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Re: 5.3L V8 oil consumption milage issues
LSF Member
Joined:
09/09/2012
From Golden Valley or SW suburbs
Posts: 81
This is great info.
I am in the market for a used Tahoe.
I am seeing a lot of 2007 Tahoes on the market ,this must be why.

I have looked at many car faxes and see no engine issues on the carfax

Is this problem 2006-2010 only?

How can I tell if there are issues like this when nothing is one the carfax?

Or should I just steer clear of this year range of Tahoe?

Thanks for some quality advice

Posted on: 2016/1/20 19:55
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