Mobil 1 5W-50 Supercar, 1500 Miles, C8 Z06 Corvette

[MitchB]

Oil change at 10909 miles.
1500 miles since last oil change at the end of December of 2024.
Oil life monitor at 42%.
Oil sampled previously at 1083 miles. Sample only. No oil change.
Car not driven from last oil change to around early May.
Mostly uneventful highway driven at between 80 -100 mph.
Several 130+ mph runs for 10 minutes or so.
A few constants:
Oil viscosity at the low end for an SAE 50.
Fuel dilution at the rate of around 1% per 1000 miles.
Wear metals stable over the last 3 oil changes.

 

[Sequoiasoon]

I'm just wondering where in NY you are doing this with not many issues?

"Mostly uneventful highway driven at between 80 -100 mph.
Several 130+ mph runs for 10 minutes or so."

 

[Cujet]

Looks to be a fine oil as long as OCI's are short enough. Fits the typical shear profile of a wide viscosity spread oil. Have you considered using the 15W-50 M1?

 

[MitchB]

I'm just wondering where in NY you are doing this with not many issues?

"Mostly uneventful highway driven at between 80 -100 mph.
Several 130+ mph runs for 10 minutes or so."

Certainly not on Long Island!

 

[Cujet]

Just an interesting calculation. A C8 Z06, at a steady state 120MPH cruise is making 25.7% of its rated HP.

The reason I bring this up is that many people don't understand that supercars are not highly stressed at what most of us would consider absurd speeds. I've driven cars capable of 200MPH+. Such as the McLaren F1 and Ferrari Enzo. They could cruise at 165MPH, and accelerated hard from that speed. Truly amazing.

 

[MitchB]

Looks to be a fine oil as long as OCI's are short enough. Fits the typical shear profile of a wide viscosity spread oil. Have you considered using the 15W-50 M1?

One has to consider that at an ambient temp of 80 degrees, my engine oil temperature typically runs around 170 degrees and maxes out at around 180 - even at sustained driving well above double nickels. The oil temp sensor is mounted in an oil gallery that is a short distance from the oil cooler and filter. It is a measure of the temperature of the oil delivered to the engine.

Nonetheless, I generally agree that using an oil with less VI improvers is benificial.

 

[MitchB]

Just an interesting calculation. A C8 Z06, at a steady state 120MPH cruise is making 25.7% of its rated HP.

The reason I bring this up is that many people don't understand that supercars are not highly stressed at what most of us would consider absurd speeds. I've driven cars capable of 200MPH+. Such as the McLaren F1 and Ferrari Enzo. They could cruise at 165MPH, and accelerated hard from that speed. Truly amazing.

I can maintain a steady state 125-130 mph using about 1/4 throttle in 8th gear. At this speed, I can use any one of 5 gears from 4th to 8th.

 

[Sequoiasoon]

I can maintain a steady state 125-130 mph using about 1/4 throttle in 8th gear. At this speed, I can use any one of 5 gears from 4th to 8th.

Almost like my 4 cyl Accord 6MT....

 

[Toyotech454]

I'm just wondering where in NY you are doing this with not many issues?

"Mostly uneventful highway driven at between 80 -100 mph.
Several 130+ mph runs for 10 minutes or so."

Depending on the area, there may not be much speed enforcement. When I lived on the east coast, I found the police very much stuck to consistent hiding spots and speed traps for years, if you knew where they wouldn't be, you could speed without much risk of infraction

 

[chris719]

Looks to be a fine oil as long as OCI's are short enough. Fits the typical shear profile of a wide viscosity spread oil. Have you considered using the 15W-50 M1?

I would not deviate from this oil. This oil has such low detergency and high ZDDP because of cam metallurgy and valvetrain design. It's bespoke for the Z06.

 

[Jetronic]

Just an interesting calculation. A C8 Z06, at a steady state 120MPH cruise is making 25.7% of its rated HP.

I didn't calculate the power but at 125 mph my diesel did about 25 mpg. So it's surprisingly low power needed. it xonsumed a fair bit more trying to get to 125 in a hurry.