Heads up and check your oil level (UPDATED)

[KD5FPV]

Mine has 488.. 

[dave07]

So the diagnosis for this problem is high oil level and fuel smell?


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[foghorn23]

1 hour ago, dave07 said:

So the diagnosis for this problem is high oil level and fuel smell?


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Yeah, when I first noticed it there was extremely strong gas smell when you removed the oil cap on the valve cover.  Oil level was way above full mark.  All this about 1 month after dealer oil change.  My oil cap still smells like gasoline, but not as strong as before.

[M1ck3y]

Just throwing this out there. Are you guys making a lot of short trips? The oil might not be getting hot enough to burn it off. I have the same problem, oil level is higher then max. Its been very cold for what feels like two months, I live 10kms from work. Coolant hasn't even hit operating temp by the time I get there.

 

Dealership recommends going for the occasional drive. Ideally towing/hauling something, put the engine under some load and get it working.

[foghorn23]

9 hours ago, M1ck3y said:

Just throwing this out there. Are you guys making a lot of short trips? The oil might not be getting hot enough to burn it off. I have the same problem, oil level is higher then max. Its been very cold for what feels like two months, I live 10kms from work. Coolant hasn't even hit operating temp by the time I get there.

 

Dealership recommends going for the occasional drive. Ideally towing/hauling something, put the engine under some load and get it working.

In my case this did start back in the December-January time frame when the temps were in single digits.  However it has been running in the 50's and 60's lately.  My daily commute is about 10 miles one way, so the engine and fluids do get up to temp, but I agree short tripping could be an issue.  However, I owned a 14 Silverado with the 5.3 and never experienced anything like this with the same drive and circumstances.  I'm still thinking I have a bad injector.  About another week or so I'm going back in.

[dave07]

I mean, all oils I have changed in every vehicle I owned have had a slight fuel smell in the oil. Its just the nature of a gasoline engine. I'm just gonna drain some oil out and be done with it. It seems like a non issue for me. I have the powertrain warranty for 5 yrs/100,000 miles anyway. So if it does fail, it will be on Chevy.

[kevinfranklin]

The first time I went to check my oil level, it was crazy high.......called my dealer in a panic, and they asked if the engine was warmed up fully.  I said "No, I'm used to being able to at least check it cold vs NOT (norm operating temp). They're different, of course, but still doable."  They said I HAVE to run them and check at NOT, which I've never heard of before. 

 

So now I check it at NOT, but I'm curious as to whether everyone is doing that, and also why it makes such a huge difference in these engines?

[L86 All Terrain]

Your used oil will always have a scent of gasoline. Especially in these DI motors I find. I keep hearing "add oil, and catch-can it because it pumps it into the intake." Yet I have never added oil between changes, nor did I find any oil, or oily film for that matter in the intake when I installed my CAI. Yes they will make oil disappear if you rod on it or there is a problem. But if you are loafing around, occasionally hitting 3,000rpm you should not be having oil consumption problems. As far as gas washing pistons, it is real and this is what killed my 800 Poolaris last round. Considering GDI was a non issue with the LS family, I can't see it washing pistons on the new LT family. There were no major changes to fuel delivery between engine families if I am correct. 

[Wxman]

48 minutes ago, kevinfranklin said:

The first time I went to check my oil level, it was crazy high.......called my dealer in a panic, and they asked if the engine was warmed up fully.  I said "No, I'm used to being able to at least check it cold vs NOT (norm operating temp). They're different, of course, but still doable."  They said I HAVE to run them and check at NOT, which I've never heard of before. 

 

So now I check it at NOT, but I'm curious as to whether everyone is doing that, and also why it makes such a huge difference in these engines?

Hmmmm.....Seems to be exactly opposite of what is cited in owner's manual.

 

"Follow these guidelines:
. To get an accurate reading, park
the vehicle on level ground.
Check the engine oil level after
the engine has been off for at
least two hours. Checking the
engine oil level on steep grades
or too soon after engine shutoff
can result in incorrect readings.
Accuracy improves when
checking a cold engine prior to
starting. Remove the dipstick
and check the level.
. If unable to wait two hours, the
engine must be off for at least
15 minutes if the engine is
warm, or at least 30 minutes if
the engine is not warm. Pull out
the dipstick, wipe it with a clean
paper towel or cloth, then push it
back in all the way. Remove it
again, keeping the tip down, and
check the level."

 

Fortunately, mine has been fine, but only at 4500 miles.  I found these instructions 'different' than any other vehicle I have had.  Vehicles were something I had always checked hot, but not this truck.

[tnchevy]

I have always checked my oil level cold in every vehicle, motorcycle, quad, lawnmower, etc I have ever owned.  I want all the oil back in the oil pan so that is why I check it cold.  

[dave07]

Drained out the excess oil. Took like 15 minutes. We will see how she does from here.


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[KD5FPV]

Just got mine back from the dealer. Tech said" no fuel in crankcase" also said " Due to the high vacuum in the crankcase of this motor, If fuel were present in the oil it would throw a rich code on the ECM and turning on the CEL" No repairs were made.

Now I have a dash cam installed they left the key in the whole time it was in the shop, they never popped the hood. Aside from that as far as I know the only way an ecm detects a rich condition is if the o2 sensors see it. Am I wrong there? 

['17 Sierra]

3 hours ago, KD5FPV said:

Just got mine back from the dealer. Tech said" no fuel in crankcase" also said " Due to the high vacuum in the crankcase of this motor, If fuel were present in the oil it would throw a rich code on the ECM and turning on the CEL" No repairs were made.

Now I have a dash cam installed they left the key in the whole time it was in the shop, they never popped the hood. Aside from that as far as I know the only way an ecm detects a rich condition is if the o2 sensors see it. Am I wrong there? 

That’s the biggest line of BS I’ve probably ever heard.

You are right in that the o2 sensors would have to see the rich condition for the ECM to throw a code but but I think that’s exactly what the tech is saying. I have never heard that crankcase fuel vapors would be enough to actually make a rich condition though.

[03dyna]

13 hours ago, KD5FPV said:

Just got mine back from the dealer. Tech said" no fuel in crankcase" also said " Due to the high vacuum in the crankcase of this motor, If fuel were present in the oil it would throw a rich code on the ECM and turning on the CEL" No repairs were made.

Now I have a dash cam installed they left the key in the whole time it was in the shop, they never popped the hood. Aside from that as far as I know the only way an ecm detects a rich condition is if the o2 sensors see it. Am I wrong there? 

Hi KD5FPV I know exactly where you are coming from I have been fighting with GM for over a year now with this problem and I think they have no idea how to fix it so they just keep denying there is a issue and they hope you will go away or get fed up and trade it off.Last year when it filled up I kept on changing the oil to save the motor now after a year of this I am just driving it and letting it fill up with gas.  After the last repair and a fresh oil change within  700 kilometers or about 400 miles it has gone more then a inch over full and finally turned on a check engine light the dealer had no time to look at it last week so I take it in on Monday to see what kind of excuse they will try to come up with this time .

[Rufasim]

I had this exact same problem on a hyundai sonata. I had to have the block replaced, probably from this issue, and me not realizing gas was getting into the oil. they had the car for about a month. When I got it back I thought I better check the oil after about a week of driving when I saw that the reading was to high. Went back the the dealer saying there is to much oil in there. They looked and put it on a lift. Came back to me and said there was something wrong with the pcv valve, or something in the system. It was replaced. I didn't feel safe with that car any more so I traded it in on a Toyota Tacoma.