frdfandc

Well, after my trip to Charlotte, I had to do another road trip up to New Jersey 2 days later. Around a 200 mile round trip. So between going to Charlotte and New Jersey, I put around 1500 miles on the truck. Total oil usage was almost 2 1/2 qts. Just stopped at the dealer a few minutes ago to report my findings. The service advisor took all my information and spoke to the Svc. Manager. 2nd week of Dec, they are going to put new rings in the bottom end. At least they are going to try something different than the, "Lets try this first method" manufacturers usually do.

Just got back from a long trip. From Delaware to Charlotte, NC. 533 miles one way towing 6,000 lbs. When I checked the oil level yesterday morning, level was at the 2nd dot. When I checked the oil this morning before leaving, I needed to add a qt of oil. I will check the level tomorrow morning. But I'm stopping in at the dealer again. Still using oil after their "valve cover" fix.

What is your oil change intervals? Mine were near 9,000 miles (14,000+ km) and I was going through 4+ qts of oil between oil changes.

The New improved valve cover is suppose to help elminate the amount of oil being pulled up into the intake manifold. Thus decreasing oils consumption. I have heard that it works in alot of cases. Keep your fingers crossed. Let's hope so. "Fingers crossed"

To partially finalize my ongoing oil consumption issue, the dealer ship installed a new drivers side valve cover with a revised baffle in it last week. So within the next few days, I'll change the oil again and proceed to monitor the oil consumption. Hopefully, though not thoroughly convinced, that this repair will solve my issue.

Another update from my last post here. 06/25/2011 Oil level just below 2nd dot on dipstick 61% on oil monitor 46020 miles 07/09/2011 Oil level between 2nd and 3rd dot on dipstick 53% on oil monitor 46854 miles 07/19/2011 Add engine oil light came on Level at add mark. 50% on oil monitor 47112 miles. I'll be heading to the dealership on Monday 7/25 to have them record this again. The last thousand miles or so have been mostly highway. Therefore cementing my theory that this engine uses more oil when the AFM is activated during long periods of driving.

Oil consumption test still being done. At the last interval and visit to the dealer ship, I added one qt of oil to bring the level back to the full mark. Today 06/10/2011 Oil level at 1st mark below full mark. 68% oil monitor 45601 miles

05/25/2011 Oil level at add mark. 78% on oil monitor 44771 miles I stopped at the dealership yesterday on my way to work. Had them check the oil level and record the mileage and oil life monitor. I also explained to them about the extended use of the AFM system due to a higher volume of highway driving the past 3 weeks and also, right after a long down hill descent, where the AFM would be active, I got back into the gas to pass a vehicle. Saw a puff of smoke out the tail pipes. I've been thinking about getting a tune and having the AFM disabled.

I started an oil consumption test as previously mentioned. Tomorrow I have to stop at the dealership since the oil level is at the add mark. Here is my recordings. 04/21/2011 Changed oil and filter at 41909 miles. Used 6.7 qts of Mobil One Synthetic 5w30 with a Mobile One filter for the 5.3 V8 Reset Oil life monitor. 04/29/2011 Checked oil level. Still on full mark. 95% on oil life monitor. Mileage is 43277. 05/09/2011 Oil level still on full mark. 89% on oil life monitor. Mileage 43768. 05/21/2011 Oil level just above add mark on dipstick. 80% on oil life monitor. Mileage 44576. (Note: most of mileage from previous reading and now has been highway/high speed mileage. Extended use of AFM has been apparent.)

I didn't actually start the test until I changed the oil this past Thursday. I'm keeping track of date oil changed, mileage when oil was changed, along with mileage and oil life monitor and date when oil is checked. Checking every 7 days, until oil level reaches the add mark on the dipstick, then heading directly to the dealer without adding any oil. I've done numerous oil consumption tests in the past 13 years (ending in 2009) as an ex-ASE auto mechanic. This is not new territory for me. I did speak with my salesman the other day as well, and he was telling me that he has seen around 6-7 owners with the same issue. But this is out of hundreds of trucks that have been sold out of this dealership. He thinks its due to the long time frame that the oil life monitor uses between oil changes. Once some of the customers reduced their oil change intervals to 4-5,000 miles, oil consumption was little, if any. So I will proceed with the test, if they tell me (once again) that the amount is normal, I'll reduce my intervals to 5-6,000 miles instead of 8500-9000 miles as I'm doing now. And he also suggested using the new oil DexOS 1 oil that GM vehicles are using for 2011 and newer. Supposed to help with oil consumption issues. http://www.sandyblogs.com/techlink/2010/09...cification.html

Whats the mileage ?? Mileage as of yesterday evening when I just changed the oil is 41909.

I have an 07 Silverado with the 5.3 with AFM. Since the last oil change, I've had to add 4 qts of oil. 2 qts at oil life monitor 59%, and 2 more qts at 20%. And it was still a 1/2 qt low the 2nd time. Following the oil life monitor, I get approx 8500 to 9000 miles on an oil change. Also, the truck sat for almost 3 weeks due to me being sick. When I went to start it just to make sure that it would start ok - original 4 year old AC Delco battery - I had burnt oil smoke come out the exhaust. Now for comparison sake, my 03 Silverado with a 5.3 non AFM engine would use no more than 1/4 qt of oil in the same time frame, and would not smoke after extended periods of not being driven. I have made 2 visits to the dealer, and we will be starting an oil consumption test, once I change the oil this week.