patentcad

My 2017 Z51 (M7, 2LT) has about 9500 miles on the clock (it is exactly 15 months since I drove the car home). It has been mostly sitting since Dec. 1, first shoulder surgery, then a snowy and cold winter here in the lower Hudson Valley of New York (I live in Chester, NY, about 45 miles NW of NY City). Last night I checked the oil. Following the clear instructions in the owner's manual, I added a liter of Mobil One to bring the level up to where it should be. So my car burned a liter of oil over 2500 miles/5 months.

That's consistent over the first 9K miles, maybe a liter of oil per 3K miles on my car. That seems to be fairly typical for this car, but I'd like to hear about the experience of other owners here.

John Micheal Henry

My 2014 Z51 does Not use oil between oil changes..

Kracka

2014 Z51 M7 with no to minimal oil consumption, depending on how I drive. My oil change intervals typically are in the 6-7k mile range (I follow the oil life indicator) and the most I've ever added between changes was a half quart after putting very aggressive miles on. I typically run my dry-sump oil level about halfway between the min & max marks on the dipstick.

I use Eco/AFM frequently on roadtrips and highway drives while the cruise control is set.

I am tuned with bolt-ons.

My first free oil change at the dealership was done at 6,500 miles with ACDelco semi-synthetic (this was before the 500-mile oil change and Mobil 1 info was released, and before DEXOS was revised to gen 2 full-synthetic); it's been only Mobil 1 since then.

TEXHAWK0

Oil could be going into the intake, especially if it has ever been over filled. Did you drive the car and get everything up to operating temp before you checked the level?

eboggs_jkvl

Are you sure you got the car oil hot and did you wait the 7 minutes before you took your measurement? Both must be done or you can screw up the oil level reading. The book says wait 5-10 minutes so I just tag the average and read at 7 minutes.

I've had no noticeable loss of oil between changes.


Elmer

rb185afm

My 16 A8 Stingray burns a quart every 3k miles with a total of 33k miles on the clock. Wife uses AFM. My GS M7 does not burn any oil at 13k miles and 7 track days. I have never used AFM once in the GS. Now that’s not enough info to say bad things about AFM, But, my 2014 Silverado burns a quart every 1k miles. It’s pretty bad and yes, uses AFM. I hate AFM.

Foosh

Same here, no oil added between changes in my '14 M7 in 15K miles.

Bill Dearborn

I agree about the OIL Temperature. If you determined temperature using the coolant gauge the oil may not have been up to temperature. It can take 15 minutes or more of idling the engine to get the oil temperature up to 175 degrees.

As for the comments about over filling that isn't a big issue since GM recommends a half quart over fill when taking the car out on a road course. That is 10.3 quarts of oil total.

My LT4's oil consumption is negligible even when running 3 track days in a row in low 90 degree temps.

Bill

Kent1999

My 2014 Stingray M7 (wet sump) uses no oil between changes so far.

I go by the OLM, so typically my changes are every 6000-7000 miles of daily driver usage.

Foosh

Agree, having nearly daily commuted in my C7, it takes at least 10 miles to get to the oil temp to 175º. Coolant temp is at normal operating temp in 2-3 miles.

SLOWRYDE

My 17 GS has not burned anything noticeable in the 6K miles I have driven it so far (2 oil changes to date). I drive it 'kinda' aggressively at times too

rmorin1249

Is there any credible and published data that demonstrates the use of AFM (V4) increases oil consumption? Thanks.

juanvaldez

My '16 Z51 (25k) doesn't use any oil during normal driving. It will use a few ounces autocrossing (12 runs).

joemessman

I have almost 60,000 on my Stingray. Change interval at about 7,500. I have never had to add oil. In fact at 7,500 it is still at the maximum level on the dipstick.

Kracka

No. I've driven cross-country and back using Eco/AFM almost the entire way and the oil level when I got home was exactly where it was before the trip.

rb185afm

No, purely opinion based on observation of way to small a sample group. I am biased and it’s not a provable fact at this point. But I won’t ever have it on in a vehicle again.

rb185afm

Note: I did not see it rear it’s head until after 10k for both my C7 and Silverado. I don’t think one long trip will do it, assuming it’s a real effect. And if it’s not, I got two shitty engines and one solid one.

Kracka

38k miles on my car. I've done 7 or so cross-country roadtrips using AFM and also use it quite frequently on the weekends, and the occasional time I drive the car to work, if I'm just cruising down the highway/tollway with the cruise control set. If you think you got a bad engine, or have excessive oil consumption, let the dealership take care of it under the long powertrain warranty (5/100 or 5/60 depending on model year).

rb185afm

Thanks for the data. Dealers just day it’s normal. I’ve tried. Though when I owned a new SLK Mercedes, I got a entire new engine under warrenty, when it consumed as much oil as my truck.

patentcad

I followed the manual instructions by the book. Oil temp was about 220ºF when I the motor off, I waited 5+ minutes and checked the dipstick 3x, it was barely over into the crosshatched area, but very near the bottom, I added about .8 liters (most of the bottle). Re-checked the level later and it was in the crosshatched dipstick area near the top.

That's what the manual tells you to do. I have never over-filled the oil.