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 Page 1 of 3 123
Username Post: 5.3 AFM Oil Consumption        (Topic#257300)
ronheb454 
Forum Newbie
Posts: 44

Reg: 02-09-11
02-09-11 10:34 AM - Post#2044236    

I had read numerous posts about the 5.3 AFM engine having an oil consumption problem that develops between 30-60,000 miles. My daughters 06 trailblazer started using a quart of oil every 2000 miles around 60,000 miles. The local dealer was going to change rings then indicated he had to perform an oil consumption chart. The vehicle now has about 65,000 miles and is still using a quart every 2,000 however the dealer was advised by the GM tech rep that a quart every 1000 miles is acceptable and no engine work would be authorized. I disagree with that and was curoius if anyone else is now being avised that 1 quart every 1000 is ok per GM. I guess in this case there would really be no need to change oil just the filter at oil change intervals since the oil is being consumpted so frequently. I asked the dealer to deactivate the AFM system however the service manager advised against it since every time a situation called for AFM mode the service engine light would come on if it was deactivated and then we would not know if there was a real problem or not. I decided against that at this point. I would appreciate any ones thoughts and experiences thanks in advance.
Ron Heberle


 
LMC Trucks
black95jimmy 
"7th Year" Silver Supporting Member
Posts: 8746
black95jimmy
Age: 63
Loc: Venice, FL
Reg: 01-05-02
02-09-11 11:09 AM - Post#2044251    
    In response to ronheb454

  • Quote:
There's a fix for it that came out in the past few months.

Cause
This condition may be caused by oil spray that is discharged from the AFM pressure relief valve within the crankcase. Under most driving conditions and drive cycles, the discharged oil does not cause a problem. Under certain drive cycles (extended high engine speed operation), in combination with parts at the high end of their tolerance specification, the oil spray quantity may be more than usual, resulting in excessive deposit formation in the piston ring grooves, causing increased oil consumption.

There's a cap for the AFM that redirects the spray that's been taking care of the issue.




AFM (active fuel management), or DOD (displacement on demand) is where under certain circumnstances cylinders 1, 4, 6, 7 will basically shut off, making your V8 into a V4
82 Monte Carlo SC, 355 w/Vortec heads, roller rockers, 670 Street Avenger, Pypes true duals.
2000 Sub.5.3L 40 Gallons of gas @ $2.92/gal. bla bla bla.


 
ronheb454 
Forum Newbie
Posts: 44

Reg: 02-09-11
02-09-11 11:24 AM - Post#2044261    
    In response to black95jimmy

Thanks for the prompt reponse. Was there a TSB issued for that repair, do you recall a number or anything I can relay to the dealer. Thanks again for your time.
Ron Heberle


 
mwright1 
Senior Member
Posts: 656

Loc: Naperville, IL
Reg: 04-05-04
02-09-11 07:50 PM - Post#2044489    
    In response to ronheb454

Check out this post over in the 07 - Present forum.
Excesive Oil Burning
If it ain't broke open it up and make it better 03 Silverado 5.3 Z71


 
ronheb454 
Forum Newbie
Posts: 44

Reg: 02-09-11
02-10-11 04:44 AM - Post#2044571    
    In response to mwright1

Thank you, I will contact GM and make an official complaint. My daughter likes the trailbazer and so do I but with all the GM vehicles I have owned through the years it is very hard for me to beleive that using 1 quart of oil in 1000 miles is acceptable. There is no external leak the oil is being consumped.I am very disappointed with that as the motor runs strong. I will report back the outcome thanks again.
Ron Heberle


 
browning 
Forum Newbie
Posts: 7

Reg: 02-10-11
02-10-11 08:57 AM - Post#2044696    
    In response to ronheb454

2007 White LTZ Crew Cab
Terrible smoke before and after shield installed.
Deflector plate installed.
Still using 1.5 quarts per 3,000 miles.
Does not use oil in the summer when I only commute around town.
I commute 45 highway miles one way in the fall and spring. This is when I see the oil consumption.

Called GM Customer Service and filed a report with them on the issue and that the GM dealership could not fix my problem. There is no fix that I am aware of at this time other than maybe cutting AFM off.

 
ronheb454 
Forum Newbie
Posts: 44

Reg: 02-09-11
02-10-11 10:30 AM - Post#2044746    
    In response to browning

Thanks, I just can not beleive that using 1 quart of oil in a 1000 miles is accepable for todays engines. We have a call in and complaint number from customer service so I'll see what happens. I will post the outcome.
Ron Heberle


 
Bad Bowtie 
Valued Contributor
Posts: 4577
Bad Bowtie
Age: 42
Loc: TX
Reg: 07-04-03
02-10-11 01:16 PM - Post#2044813    
    In response to ronheb454

  • ronheb454 Said:
I had read numerous posts about the 5.3 AFM engine having an oil consumption problem that develops between 30-60,000 miles. My daughters 06 trailblazer started using a quart of oil every 2000 miles around 60,000 miles. The local dealer was going to change rings then indicated he had to perform an oil consumption chart. The vehicle now has about 65,000 miles and is still using a quart every 2,000 however the dealer was advised by the GM tech rep that a quart every 1000 miles is acceptable and no engine work would be authorized. I disagree with that and was curoius if anyone else is now being avised that 1 quart every 1000 is ok per GM. I guess in this case there would really be no need to change oil just the filter at oil change intervals since the oil is being consumpted so frequently. I asked the dealer to deactivate the AFM system however the service manager advised against it since every time a situation called for AFM mode the service engine light would come on if it was deactivated and then we would not know if there was a real problem or not. I decided against that at this point. I would appreciate any ones thoughts and experiences thanks in advance.



Is her's a V-8 model, like in the GMC Denali?
GMC. We are Professional Grade.

http://www.cardomain.com/id/2004VHO


 
ronheb454 
Forum Newbie
Posts: 44

Reg: 02-09-11
02-11-11 04:18 AM - Post#2045069    
    In response to Bad Bowtie

Yes it is the v8, 5.3 AFM engine. We really like the vehicle, runs and rides great however I can not agree with being told that an engine today using 1 quart of oil in 1000 miles is acceptable. That is an engine with less than 65,000 miles. None of my other GM vehicles ever went through oil at that rate. I am not talking about a leak. This engine has no signs of external oil leaks. The oil is being burned internally even though it does not smoke. Our engine is using a quart about every 2000 miles. The local GM factory rep said that 1 quart of oil in 1000 miles is acceptable. I find that very hard to believe.
Ron Heberle


 
Chevrolet Customer Service 
Contributor
Posts: 212
Chevrolet Customer Service
Reg: 07-05-10
02-17-11 07:36 AM - Post#2047874    
    In response to ronheb454

Ron,
Can you please email me with your VIN and current mileage? I look forward to your response.
Christina
GM Customer Service
>>>>>> Please check out the new Chevrolet Owner Center at https://my.chevrolet.com/ for more vehicle information!


 
ronheb454 
Forum Newbie
Posts: 44

Reg: 02-09-11
02-17-11 08:20 AM - Post#2047903    
    In response to Chevrolet Customer Service

I know the mileage is currently 68,500. I do not have the vin number on me right now but will post later. My daughter did receive a response from cutomer service confirming the fact that using 1 quart of oil every 1000 miles is acceptable. I really find that very hard to beleive for today's engines. Naturally we are talking about the 5.3 with AFM. As a long time GM vehicle owner and supporter I find this very unacceptable. I was considering a new Avalanche but the only engine available is the 5.3 with AFM. I would be unhappy to spend that kind of money on a vehicle that might use oil as this higher rate. I do not think I will consider one now. Thanks for your help Christina I will post the vin number later, have a good day.
Ron Heberle


 
RN59FAN 
Senior Member
Posts: 332

Loc: Crystal, MN U.S.A.
Reg: 02-22-01
02-17-11 02:17 PM - Post#2048030    
    In response to ronheb454

Hi guys!
Just a side note on the Oil usage.

I have a (now in-famous) '99 Sliverado.
5.3V8, AC & all the trimmings / Z71 package.
I baby his thing and only use it for 5 mile trips to work, and towing a ski boat.
Just recently (last oil change) I noticed that the "Check Oil Level" light came on AND it was a quart LOW!!
112 K miles. I was told by other faithfull owners that the GM-brand trucks would last at least 200 K before any major issues. Well mine seems to have every issue stated in these posts.
(Encoder sensor, check 4wd, check engine, steering column recall, etc.)
Now OIL!

Well, GM USED to make dependable vehicles . . .

-RN

Edited by RN59FAN on 02-17-11 02:20 PM. Reason for edit: No reason given.

 
ronheb454 
Forum Newbie
Posts: 44

Reg: 02-09-11
02-17-11 06:20 PM - Post#2048123    
    In response to Chevrolet Customer Service

Here is the vin 1GNET16M666131685 with 68,500 miles. Thanks again for any help as I still do not beleive an engine using 1 quart in 1000 miles is acceptable.
Ron Heberle


 
Bad Bowtie 
Valued Contributor
Posts: 4577
Bad Bowtie
Age: 42
Loc: TX
Reg: 07-04-03
02-18-11 08:10 AM - Post#2048346    
    In response to RN59FAN

  • RN59FAN Said:
Hi guys!
Just a side note on the Oil usage.

I have a (now in-famous) '99 Sliverado.
5.3V8, AC & all the trimmings / Z71 package.
I baby his thing and only use it for 5 mile trips to work, and towing a ski boat.
Just recently (last oil change) I noticed that the "Check Oil Level" light came on AND it was a quart LOW!!
112 K miles. I was told by other faithfull owners that the GM-brand trucks would last at least 200 K before any major issues. Well mine seems to have every issue stated in these posts.
(Encoder sensor, check 4wd, check engine, steering column recall, etc.)
Now OIL!

Well, GM USED to make dependable vehicles . . .

-RN




All I'm going to say is this is why I never buy the 1st run of ANY manufacturers newest vehicle designs.
GMC. We are Professional Grade.

http://www.cardomain.com/id/2004VHO


 
browning 
Forum Newbie
Posts: 7

Reg: 02-10-11
02-18-11 08:27 PM - Post#2048692    
    In response to ronheb454

Ron, I just happened to glance at your VIN and I believe that you have the same engine that I have. The aluminum block LH6 coded engine. We have the same 8th digit on our VIN# which is what they use to tell what engine you have.
I took it to a performance shop and they did a full flush to get all the carbon and oil build up out. He told me when they started it blew smoke out for a few minutes but cleared up. My next step will be turning the AFM off if this doesn't clear it up because I'm over 100k.

 
Vista Cruiser 
Moderator
Posts: 5200
Vista Cruiser
Loc: Erie Canal
Reg: 10-01-99
02-18-11 10:18 PM - Post#2048719    
    In response to RN59FAN

  • RN59FAN Said:
Hi guys!
Just a side note on the Oil usage.

I have a (now in-famous) '99 Sliverado.
5.3V8, AC & all the trimmings / Z71 package.
I baby his thing and only use it for 5 mile trips to work, and towing a ski boat.
Just recently (last oil change) I noticed that the "Check Oil Level" light came on AND it was a quart LOW!!
112 K miles. I was told by other faithfull owners that the GM-brand trucks would last at least 200 K before any major issues. Well mine seems to have every issue stated in these posts.
(Encoder sensor, check 4wd, check engine, steering column recall, etc.)
Now OIL!

Well, GM USED to make dependable vehicles . . .

-RN



Did they? It was'nt that long ago, IF a vehicle made it to 100k, you threw a party, and then threw it away.

You have a 12 year old truck with 112k and none of the issues you have listed above are major, or even close but your bashing it? One quart low at oil change time and your bitching? So i guess your not checking your over 100k truck's oil level at all between changes? It's not dependable? Left you on the side of the road has it?

You need a Dodge.

Kenney AKA Blizzardboy

09 Impala SS......82 T/A......72 Vista Cruiser
12 Cruze..........98 Riviera.........07 C-1500
04 GTP..........68 Firebird.........98 F-150
.


 
ronheb454 
Forum Newbie
Posts: 44

Reg: 02-09-11
02-21-11 06:52 AM - Post#2049779    
    In response to browning

I thought about turning off the AFM system, the only problem with that is whenever the conditions call for AFM, if the system is turned off, the service engine light would come on. You wouldn't know for sure whether you had another problem.

Let me know if the carbon cleaning helped thanks.
Ron Heberle


 
DeLong 
Banned Member
Posts: 2868

Loc: Rural Illinois
Reg: 06-06-02
02-21-11 09:09 AM - Post#2049840    
    In response to ronheb454

AFM is a joke in my book. My 07 w afm did no better on gas than my 2000. Same trips for a year showed 0 improvement in mileage..
00 Yukon SLT XL 5.3
98 Lumina Police Package 3.8
88 2500 4X4 5.7
87 Mustang LX 5.0
67 Mustang Fastback 289
65 Mustang Fastback 289


 
jdb 
Forum Newbie
Posts: 5

Reg: 12-16-07
02-22-11 08:13 PM - Post#2050595    
    In response to ronheb454

  • ronheb454 Said:
I thought about turning off the AFM system, the only problem with that is whenever the conditions call for AFM, if the system is turned off, the service engine light would come on. You wouldn't know for sure whether you had another problem.

Let me know if the carbon cleaning helped thanks.



Not true, the dealer just doesn't want to, or isn't allowed to disable it!

I disabled afm on my truck along time ago with no problems. It's got 75,000 on it now and so far, doesn't use a drop of oil!
2008 Chevy Silverado, Ext Cab, Z71

1971 Chevelle


 
ronheb454 
Forum Newbie
Posts: 44

Reg: 02-09-11
02-23-11 04:06 AM - Post#2050664    
    In response to jdb

Thanks for the info, glad to hear turning off the AFM took care of the oil issue. What the dealer said made sense so I did not challenge it but if it worked for your truck it should not be a problem with my daughters trailbazer. I noticed you have a 71 Chevelle. So do I, an SS454, green with white strips. What color is yours, thanks again for the information.
Ron Heberle


 
Chevrolet Customer Service 
Contributor
Posts: 212
Chevrolet Customer Service
Reg: 07-05-10
02-23-11 07:24 AM - Post#2050748    
    In response to ronheb454

Ron,
Did the dealer do an oil consumption test?
Christina
GM Customer Service
>>>>>> Please check out the new Chevrolet Owner Center at https://my.chevrolet.com/ for more vehicle information!


 
ronheb454 
Forum Newbie
Posts: 44

Reg: 02-09-11
02-23-11 08:31 AM - Post#2050764    
    In response to Chevrolet Customer Service

Intially the service manager wanted to replace the oil control rings but needed authorization from GM first. He then advised us we needed to complete the oil comsumption test and the magic number for getting repairs authorized was 1 quart per 2000 miles. Our vehicle was using a quart every 2000 miles however now the service manager advised that the GM factory representative indicated GM's new position was 1 quart for every 1000 miles is acceptable. This does not seem right to me for engines of today. I am not sure who is telling the truth here. We like the vehicle but 1 quart for every 1000 miles seems absurd. Our vehicle is currently using 1 quart for every 2000 miles which seems high to me. My Astro with the 4.3 at over 100,000 miles goes 5 to 6,000 miles before it might need a quart of oil. Let me know if you need anything else thanks.
Ron Heberle


 
jdb 
Forum Newbie
Posts: 5

Reg: 12-16-07
02-23-11 07:10 PM - Post#2051098    
    In response to ronheb454

  • ronheb454 Said:
I noticed you have a 71 Chevelle. So do I, an SS454, green with white strips. What color is yours, thanks again for the information.



Nice!

Mine is a mostly original Malibu. It still has its original 307 in it even. Car was a copper color, but is now a dark maroon.

Good luck on the oil problem!
2008 Chevy Silverado, Ext Cab, Z71

1971 Chevelle


 
browning 
Forum Newbie
Posts: 7

Reg: 02-10-11
03-02-11 07:19 PM - Post#2054873    
    In response to Chevrolet Customer Service

I bought the predator diablo and disabled AFM. Guess what? It is still consuming oil at the tune of 1.25 qts low today at 1000 miles. I thought turning the AFM off was really going to have an effect on it, but of course I was wrong. This is driving me nutzzzz. Dealership is already in my pocket a grand and its no better. Anybody know of an engine that I can put in this truck that will not have AFM?

 
DeLong 
Banned Member
Posts: 2868

Loc: Rural Illinois
Reg: 06-06-02
03-02-11 07:32 PM - Post#2054880    
    In response to browning

Would an earlier 5.3 w/o afm work? I just changed my oil @ 158k and my pre afm 5.3 in the yukon used about 1.25qts in 7800 miles.
00 Yukon SLT XL 5.3
98 Lumina Police Package 3.8
88 2500 4X4 5.7
87 Mustang LX 5.0
67 Mustang Fastback 289
65 Mustang Fastback 289


 
ronheb454 
Forum Newbie
Posts: 44

Reg: 02-09-11
03-03-11 04:23 AM - Post#2054970    
    In response to browning

Sorry to hear that but thanks for the info. It is amazing how some folks do not have an oil comsumption issue at all, others seem to take care of the problem by turning the AFM off while others can not get rid of the problem at all. I do not know what to do and I have not heard any more from GM so I guess they are standing by the fact that using 1 quart of oil for every 1000 miles is acceptable. We really love this vehicle however if we knew that before would not have purchased it and knowing this now, will not purchase another vehicle with the AFM system. Sorry to hear about your troubles, thanks for sharing, I understand your feeling.
Ron Heberle


 
ronheb454 
Forum Newbie
Posts: 44

Reg: 02-09-11
03-03-11 04:31 AM - Post#2054977    
    In response to DeLong

I would think it would work. I know the pre AFM 5.3's were good motors. Our current 5.3 is good other than being told by GM that it is ok to use 1 quart of oil every 1000 miles does not set while with me. It is hard for me to accept the fact that someone would even make a comment like that for an engine of today. This sounds like a motor 30 or 40 years ago. I am not ready to put another motor in our 2006 Trailblazer however because of the lack of help, we will not buy another AFM motor.
Ron Heberle


 
Bad Bowtie 
Valued Contributor
Posts: 4577
Bad Bowtie
Age: 42
Loc: TX
Reg: 07-04-03
03-03-11 08:13 AM - Post#2055084    
    In response to browning

  • browning Said:
I bought the predator diablo and disabled AFM. Guess what? It is still consuming oil at the tune of 1.25 qts low today at 1000 miles. I thought turning the AFM off was really going to have an effect on it, but of course I was wrong. This is driving me nutzzzz. Dealership is already in my pocket a grand and its no better. Anybody know of an engine that I can put in this truck that will not have AFM?




A 4.8L, a 2006 5.3L, or a 6.2L
GMC. We are Professional Grade.

http://www.cardomain.com/id/2004VHO


 
Vista Cruiser 
Moderator
Posts: 5200
Vista Cruiser
Loc: Erie Canal
Reg: 10-01-99
03-05-11 08:56 AM - Post#2056119    
    In response to browning

Your oil control rings are still set-up. The de-carbonizing did'nt work.

Mechanics tell me the baffle and the de-carbonizing really does work, but, as anyting, it has to be done right. They are amazed that a chemical solution works for anything, it usually does'nt, but that it does stop the consumption. They have done this to several, and the ones that have reported back are ok.

The dealer you used may have not left the solution in long enough, or maybe did'nt "beat the snot" out of it afterwards. They tell me this is what needs to be done to free the rings.
Kenney AKA Blizzardboy

09 Impala SS......82 T/A......72 Vista Cruiser
12 Cruze..........98 Riviera.........07 C-1500
04 GTP..........68 Firebird.........98 F-150
.


 
Chevrolet Customer Service 
Contributor
Posts: 212
Chevrolet Customer Service
Reg: 07-05-10
03-08-11 08:00 AM - Post#2057717    
    In response to ronheb454

" The accepted rate of oil consumption for engines used in the vehicles referenced is 0.946 liter (1 qt) in 3200 km (2000 mi)."
" Important: This rate only applies to personal use vehicles, under warranty, that are driven in a non-aggressive manner and maintained in accordance with the appropriate maintenance schedule, with less than 58,000 km (36,000 mi), or driven at legal speeds in an unloaded (for trucks) condition."

" Important: This rate does not apply to vehicles that are driven in an aggressive manner, at high RPM, high speeds, or in a loaded condition (for trucks). Oil consumption for vehicles driven under these conditions will be more. "

I hope this information helps.

Christina
GM Customer Service
>>>>>> Please check out the new Chevrolet Owner Center at https://my.chevrolet.com/ for more vehicle information!


 
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