[Michael2000]

Originally Posted by Stephen12ZL1

http://www.corvetteactioncenter.com/...date-1389.html

Why is this oil not recommended for the 1LE?

[mlee]

Originally Posted by Michael2000

Why is this oil not recommended for the 1LE?

Not recommended for ZL1 1LE and the ZR1 on the track due to excessive G-Forces. RPO A1Z refers to the ZL1 not the SS or LT 1LE cars.

My car came with 0W-40 from the factory.

[Stephen12ZL1]

AL stated in an informal speech that the ZL1 1LE would be better suited with 15w50 Mobil 1 on track only. Mobil 1 15w50 is not Dexos 2 and the oil needs to be changed after an event to the appropriate 5w30 or 0w40 oil which is Dexos 2 approved. Expensive proposition...I doubt it is worth the hassle unless the track has a high g extended turn(s). With 9-10 qts in the sump, it would be very unlikely the sump will be pumped dry.

[Chris C 1SS 1LE]

Sharing

[Gunkk]

Originally Posted by Michael2000

Why is this oil not recommended for the 1LE?

It is the factory fill and is 100% recommended for street use, as Mike said.

Originally Posted by Stephen12ZL1

AL stated in an informal speech that the ZL1 1LE would be better suited with 15w50 Mobil 1 on track only.

Also answered by Al O. in writing right here:
https://www.camaro6.com/forums/showt...php?p=10270970


I'm curious if it'll be widely available as promised by Mobil in "Q3" ... oh wait.

[laynlo15]

I'm not running the 0w anymore after pulling the motor apart after 2 ring lands broke. The center main bearing was in really bad shape and my engine builder said that I shouldn't run the 0w since I'm drag racing 99.99 percent of the time. This motor I'll be running 15w40 Mobil 1. I was using Royal Purple and have been for a while but switching back to the Mobil 1. Probably should have changed earlier, my bad.

[mlee]

Originally Posted by Stephen12ZL1

AL stated in an informal speech that the ZL1 1LE would be better suited with 15w50 Mobil 1 on track only. Mobil 1 15w50 is not Dexos 2 and the oil needs to be changed after an event to the appropriate 5w30 or 0w40 oil which is Dexos 2 approved. Expensive proposition...I doubt it is worth the hassle unless the track has a high g extended turn(s). With 9-10 qts in the sump, it would be very unlikely the sump will be pumped dry.

^^^^Exactly... I'll wait until I start pulling extended G's. Tires + Oil = expensive proposition.

This stuff is in the manual now for the 2019's

[EDFHOBBIES]

Dexos 2 was developed mainly for emissions or emissions compliance that keeps creeping up on us "Fact".. Has nothing to do with better protection, racing, whatever.. I also think it goes hand and hand better with the direct port injection look at all the pics of the build up on the valve stems since the injectors aren't sprayed directly on the valves.

A majority of that build up are the additives (soft metals ect) put in oil for wear protection, viscosity break down, and length of intervals you can go to reduce corrosive acids from sulfur.

Problem is a lot the good wear additives are reduced or removed now one way you can tell is the TBN has fallen. the new dexos 2 stuff has a TBN rating of 7 something to 8.6 which is pretty crappy you can get that in a autozone synthetic.. They removed the additives so they would be LOW ASH compliant dexos 2. Low ash burns friendlier and doesn't collect on the valve stems or exhausts as bad known as soot..

All the great anti wear extreme oils have a high ASH number greater than 1.0 in fact a lot are close to 2.0 where a low ash oil is deemed to be 0.8 or lower, medium 0.8 to 1.0 and high ash 1.0 and higher..

If your that concerned about the best oil under extreme conditions I would stick with a high TBN number like the best Mobile 1 such as the 1 year interval, Mobile 1 Euro, Amsoil, (incidentally it looks like pennzoil, castrol, and quaker state do not publish a lot of there analysis or numbers...) I agree a heavy weight for racing or turbo cars.

As far as emission compliant for me I run a bad azz catch can and bad ass oil with a high tbn!

nothing on the LT1/4 has change that calls for different oil for the emissions.. The cats seem the same, the 02 look the same, the purge solenoid ect.. I thinks its a way to make it past the warranty to have to get a valve or manifold cleaned.


The analysis of the oil doesn't lie, go do some reading and your will see what I'm saying has some validity.

If your trying to stay emission or warranty friendly.. I think Schaeffer's oil had the highest TBN w the lowest ASH content when I was researching.. There are a lot of race teams that swear by their 50 weights..

Basically if your going to use a dexos 2 compliant it's going to have a low TBN in the 8 range and an ASH number of .08 or less.. A really good oil will have a TBN 12 or higher and be closer to 2.0 in ash..

FYI: Fun Fact at my last job in dallas we used TRC with a TBN number of 15.3.. When you use certain products like TRC, Certified oil, shaeffers oil ect.. some of the small blenders that sale their own oil with a salesman vs walmart shelves and tv advertising most of them offer free analysis through a 3rd party and allow you to compare vs another brand..I had a company truck that came back from the oil analysis Lab at 26K plus miles suitable for continued use..needles to say I chickened out and changed it anyway. I continually run our trucks 15 or 20k before servicing them.. Of course your talking 1200 for 55 gallons vs 800 something for mobil 1.

[DaveC113]

TBN has to do with how long you can run the oil, with a performance car it's the least of my worries as I won't be going for extended change intervals anyways.

IMO, what is important is the HTHS, or High Temp High Shear, and that the oil does not shear down to a lower weight with use.

IME, M1 ESP has high HTHS and does not shear. I used the 5w30 on my STi and came back w/ perfect used oil analysis.

A low volatility oil without additives that cause intake deposits and don't damage cats is also a bonus. I'm not sure why anyone would use anything else unless it's a track specific heavier weight oil, but apparently Chevy believes the ZLE is the only car that needs this.

[Chef-j]

EDFHOBBIES,

Schaeffer oil is that good? Im looking to try their 5w30 9000 for my next change. Btw mine is just SS.

[tjaizl1]

Originally Posted by Chris C 1SS 1LE

Sharing

Attachment 961480

why is it that my local chevy dealership's service department still fail to see the new change when their parts department already have this new oil in stock?

I have one complimentary oil change left and they said theyre not willing to use Mobil 1 oil either.... apparently only vettes get it because their oil cap say so and not the camaros.....

[Artos]

Originally Posted by tjaizl1

why is it that my local chevy dealership's service department still fail to see the new change when their parts department already have this new oil in stock?

I have one complimentary oil change left and they said theyre not willing to use Mobil 1 oil either.... apparently only vettes get it because their oil cap say so and not the camaros.....

I printed out the bulletin walked in & old them need to get this oil in as folks are gonna start asking for it...they made a copy of it, thanked me for the heads up, got it ordered & scheduled the change a few days later when it was convenient for me.

I did buy the new oil cap, but they didn't see it till the day of the service. That bulletin is your muscle...use it.

[EDFHOBBIES]

Originally Posted by DaveC113

TBN has to do with how long you can run the oil, with a performance car it's the least of my worries as I won't be going for extended change intervals anyways.

IMO, what is important is the HTHS, or High Temp High Shear, and that the oil does not shear down to a lower weight with use.

IME, M1 ESP has high HTHS and does not shear. I used the 5w30 on my STi and came back w/ perfect used oil analysis.

A low volatility oil without additives that cause intake deposits and don't damage cats is also a bonus. I'm not sure why anyone would use anything else unless it's a track specific heavier weight oil, but apparently Chevy believes the ZLE is the only car that needs this.

Yes exactly.. But that number goes down when you remove wear additives such as zinc, calcium, and other soft metals that lowers the ASH number for dexos 2.. I merely stated that can use this number as a reference for the best protection oil short or long intervals will have a high TBN.. They are correlated indirectly.. Kill the additives lowers the ASH which lowers the TBN..

[1LE Red Dragon]

Originally Posted by tjaizl1

why is it that my local chevy dealership's service department still fail to see the new change when their parts department already have this new oil in stock?

I have one complimentary oil change left and they said theyre not willing to use Mobil 1 oil either.... apparently only vettes get it because their oil cap say so and not the camaros.....

The problem is the bulletin only references 2019 models. It is not retro back to the 2018 models oddly enough. Same motor requires different oil. The price per quart or liter is the same per my dealer but they won't put the 0w-40 in my car. They will only out the 5w-30 in the 2018 model if using the 2 complimentary ones included from GM.

If someone has a tsb or bulletin that specifically shows 2018 models too, then please share.