2023 C8 Z06 Corvette, Mobil 1 Supercar 5W-50, 1489 Miles on Sample, 9310 Total Miles

[MitchB]

Sample taken at 9310 miles.
1489 miles on sample only - no oil change.

Oil level found rising on dipstick by ~1/2 inch from full.
Oil capacity = 8 quarts.
1.46% fuel dilution = 110 ml of fuel.
Viscosity dropping close to 40 wt. range.

 

[LazyDog]

How long are you planning on running the oil?

 

[burbguy82]

Looks good. Do you drive it like a Corvette or a grandma?

 

[Fa24wrx]

Curious if you live in a warmer climate. 10w or 15w may be something to look for if you live in warmer winter area to reduce Viscosity modifiers, which will reduce likelihood of Viscosity drop

 

[himemsys]

Did you add any oil between the first and second sample? I've never seen Boron go up, only down. The only way I can imagine going up is if fresh oil was added to the mix.

 

[fantastic]

Looks good, Viscosity expected on that 5w-50. Seems to shear pretty quick.

 

[MitchB]

I drove another 200 miles and then put the car to bed for the winter.

 

[CarlB]

Looks good. Do you drive it like a Corvette or a grandma?

That's the same.

 

[MitchB]

Looks good. Do you drive it like a Corvette or a grandma?

Being I'm a responsible member of society driving on public roads, I try to be safe at all times. Seriously, the car is driven mostly highway typically between 85 and 100 mph with a few sustained moments here and there at around 120+.

 

[MitchB]

Curious if you live in a warmer climate. 10w or 15w may be something to look for if you live in warmer winter area to reduce Viscosity modifiers, which will reduce likelihood of Viscosity drop

Yeah, something to think about.

 

[MitchB]

Did you add any oil between the first and second sample? I've never seen Boron go up, only down. The only way I can imagine going up is if fresh oil was added to the mix.

The first sample was drawn during an oil change. The second sample was after this oil change.

 

[burbguy82]

Being I'm a responsible member of society driving on public roads, I try to be safe at all times. Seriously, the car is driven mostly highway typically between 85 and 100 mph with a few sustained moments here and there at around 120+.

i would say there is more danger in driving it easy, than the motor oil

 

[burbguy82]

That's the same.

normally i would agree.

 

[addyguy]

Detergent additive levels in this analysis are too low, they should be much higher.

 

[GM4LIFE]

I run Mobil 1 Super Car 0W-40 on my LT4 equipped GM vehicles and the shearing after that low of miles is concerning. I do run Amsoil SS 0W-40 on my TRX and I rest easy knowing it doesn't shear during the 5K OCI.

Maybe go to Amsoil SS 5W-50 instead of Mobil 1 on your next oil change? I used Mobil 1 for decades and the Super Car formula is supposed to be the best street/track oil they offer. I'm disappointed. Good thing I don't run oil for long on any of my vehicles.