GM adds new dexos R approved oils

[nordique14]

I see the list of approved dexos R oils has increased since I last looked. As of 3/16/26

 

[jbawden]

I wonder how much this has to do with the L87 debacle? By that I mean, regular people are going to be annoyed that they have to buy Supercar for their T-Ball mobility device (now that Dexos R is the recommendation). I'm sticking with Supercar.

 

[hawk02]

I wonder how much this has to do with the L87 debacle? By that I mean, regular people are going to be annoyed that they have to buy Supercar for their T-Ball mobility device (now that Dexos R is the recommendation). I'm sticking with Supercar.

I understand the dealers are now using the Mobil 1 FS oil for changes in the 6.2L L87s because it’s less expensive than the Super Car oil. So yes, I think cost has a lot to do with the expanded list of Dexos R approved oil.

 

[Moffetts]

I didn’t know there was a 5w-50 version of M1 Supercar.

 

[RDATLTE]

I didn’t know there was a 5w-50 version of M1 Supercar.

Track oil for the ZL1 1LE.

 

[Moffetts]

Appears that the C8 Z06/ZR1 uses it as well.

 

[hawk02]

Track oil for the ZL1 1LE.

The ZL1 1LE oil weight for track days is 15W 50. 0W 40 is the oil weight for street use.

The 5W 50 is for the C8 Z06 & ZR1.

 

[RDATLTE]

The ZL1 1LE oil weight for track days is 15W 50. 0W 40 is the oil weight for street use.

The 5W 50 is for the C8 Z06 & ZR1.

You're correct. Sorry for the misinformation. I even checked my notes before posting. Obviously, not close enough.

 

[nordique14]

The ZL1 1LE oil weight for track days is 15W 50. 0W 40 is the oil weight for street use.

Is that only for the ZL1 1LE or all ZR1?

Since the 5BW also has the same LT4 engine, I am wondering if the same recommendation of 15W50 should be true for 5BW that see track use.

 

[SIR ICE]

According to a posting by GM Engineering a few years back in response to questions on the Camaro form, 15W50 is required 'do to the higher cornering loads when using the Goodyear 3R tires'.

It's been said that at 1 g cornering that the oil in the pan is at 45 degrees.

The Camaro ZLE is a wet sump while the Corvettes are day sump.

If that theory is applied to the LT4 wet sump in the CT5 BW, then yes 15W50 would be go to oil for track use.

 

[nordique14]

Thanks for the info. Weird that GM has not issued the same guidance for Precision Package 5BW as they come with Cup 2R tires that I would imagine are similar to the Goodyear 3R.

 

[SIR ICE]

Thanks for the info. Weird that GM has not issued the same guidance for Precision Package 5BW as they come with Cup 2R tires that I would imagine are similar to the Goodyear 3R.

Key word is 'weird'. I'm sure they have bigger fish to fry.

 

[RDATLTE]

According to a posting by GM Engineering a few years back in response to questions on the Camaro form, 15W50 is required 'do to the higher cornering loads when using the Goodyear 3R tires'.

It's been said that at 1 g cornering that the oil in the pan is at 45 degrees.

The Camaro ZLE is a wet sump while the Corvettes are day sump.

If that theory is applied to the LT4 wet sump in the CT5 BW, then yes 15W50 would be go to oil for track use.

I'd say especially with the PP with Cup 2s.