[mlee]

Originally Posted by BlueinTN

Is one dry sump and one wet? Just a question?

LT5 is also a dry sump.

[ZRacerLE]

Originally Posted by BlueinTN

Is one dry sump and one wet? Just a question?

Yes, the Z06 has a dry sump and the ZL1 has a wet sump. I am by far no expert, but my guess is the ZL1 might need the higher viscosity during cornering which will cause the oil between moving parts to flow slower and remain there longer to compensate for the fact that the oil in the pan will collect to the side of the pan and possibly briefly starve the engine. The dry sump just keeps flowing oil during cornering because it's in a separate pressurized vessel. The cost of the higher viscosity would be a slight power loss compared to 0w40 and ruining your cats?

Am I correct automotive engineers?

[PROMETHEUS]

C7 Z06 LT4 is a dry sump and the Camaro LT4 is a wet sump, although I believe they both hold the same amount of oil.

[mlee]

Here's what Al had to say on the subject.

Originally Posted by mlee

Al's Answer

Well, it’s been a busy summer, getting ready for the refreshed Camaro for 2019, Camarofest, and all the other Camaro shows that we wait for all winter. I admit I am way late on this one, so my apologies on behalf of myself and the Camaro team on this installment of “Ask Al”.

Here was the topic for this round, having to do with oil selection for tracking your Camaro:

Can you expand on the recommended engine oils for track / competitive driving in the Camaro?

• Mobil 1® 15W-50 engine oil appears as a secondary choice for the ZL1 while appearing as the only choice for the ZL1 1LE?
• Some folks would like to regularly use Dexos2™ 0W-40 or 5W-40 oils on the street - any advice/suggestions?
• There is a NEW oil…Mobil 1 0W-40 ESP that is Dexos2-approved. How does that mix into this discussion?

The LT1 and LT4 engines are factory filled with 0W-40 Dexos2 oil. The 0W-40 Dexos2 engine oil is approved for both track and street use with the LT1 and LT4 (ZL1 only, not ZL1 1LE) engines. This is straight out of the owner’s manual.

For the ZL1 1LE, 15W-50 is the required track oil due to the increased lateral acceleration capability of the vehicle. It has enough of a grip capacity increase above all the other models that the added protection from 15W-50 is needed. The thicker 50 weight viscosity helps with oil pan drawdown when the oil gets hot on the track and reduces risk of pressure dropouts. For the ZL1, 15w-50 will add protection but is not required, as the 0w-40 was tested and provides adequate protection in a track environment.

Since Mobil 1 15w50 is not Dexos-certified, it is not recommended for long-term street driving use. Follow the Owner’s Manual and switch back to the 0W-40 Dexos-certified oil after your track session is over and you are back to street use.
With regard to the new Mobil 1 0W-40 ESP Dexos 2 oil, it is an acceptable oil for both the street and track, for the SS, SS 1LE, and the ZL1 due to having less aeration. However, it is not recommended for tracking your ZL1 1LE.

[ZRacerLE]

Originally Posted by mlee

Here's what Al had to say on the subject.

Oh what does Al know?? ... oh nevermind

[Cleancoupe]

mlee
Well there we go. That takes care of that one.

[mlee]

Originally Posted by ZRacerLE

Oh what does Al know?? ... oh nevermind

Originally Posted by Cleancoupe

mlee
Well there we go. That takes care of that one.

[ZRacerLE]

Originally Posted by Cleancoupe

mlee
Well there we go. That takes care of that one.

Settled for sure

[jvandy50]

Originally Posted by mlee

Except how do they know you were on the track unless you say so.

I didn't really say that but the oil cap does say 0W40...

Lol I hear ya...but i also recently watched a video of people tracking spring breakers spreading covid19 on their journey home...I’d probably just pull up thinking they knew my entire life story 15 minutes before i arrived!

Cant get away with nothin i tell ya