0W40?

[Hib Halverson]

Starting in 2019, GM changed to a 0W40 engine oil for all Corvette engines except the LT6 which uses a 5W50.

Has anyone tried a 0W40 in the first generation LT5?

I would think that the same two major advantages?1) oil gets to bearings more quickly on cold starts and 2) better thermal stability during aggressive engine operation?that GM gained with using a 0W40 in the 2G LT5 and the LT2 woulid be useful in the original LT5.

[mlipmd]

I put it in my '90 (Mobil 1 0W40 European formula) because of the higher zinc and phosphorous and it seems to work well, quick starts, no noises, temps and pressures normal, no problems, can't see any difference in performance from the original Mobil1 that was in there before. Only time will tell.

[HAWAIIZR-1]

No experience with the Euro 0W-40, but I just changed my oil to Mobil Formula M 5W-40. No issues and quiet start up. Karl can tell us more about Formula M, but I like it so far.


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[Karl]

I am using Mobil 1 Formula M 5w40 with no issues.

The European motor oils appear to have more zinc and phosphorus.

Car runs great and this is used in my 401 cid LT5. I chose this weight combo for all the reasons mentioned above.

[HAWAIIZR-1]

Originally Posted by Karl

I am using Mobil 1 Formula M 5w40 with no issues.



The European motor oils appear to have more zinc and phosphorus.



Car runs great and this is used in my 401 cid LT5. I chose this weight combo for all the reasons mentioned above.

Karl,

Thanks again for the recommendation. I have not drank the AMSOIL Kool-Aid and they will not reasonably ship to military address overseas; Mobil 1 Formula M is easy to get. BTW, your image you posted is blurry AF.


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[Karl]

Originally Posted by HAWAIIZR-1

Karl,

Thanks again for the recommendation. I have not drank the AMSOIL Kool-Aid and they will not reasonable ship to military address overseas; Mobil 1 Formula M is easy to get. BTW, your image you posted is blurry AF.


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Edit

[Hib Halverson]

Thanks for the replies, folks.

For those who use M1, the latest 0W40 is "Mobil One Supercar". Among others, it's the factory fill on C8s w. LT2s. M1 "Supercar" is the 10W40 ESP that was rebranded.

[Perry Mitchell]

Well said!

[DRM500RUBYZR-1]

It is extremely difficult, nearly impossible, to prove something cannot possibly happen.
However, that does not mean that it can or will.

The Zinc and ZDDP content of the 0-40 is higher than most of what is often currently being used in these and other older engines.

Religion, politics and yes, oil, are very often controversial subjects.

Mobil One has been around since 1976.

While I understand it's formula has had to undergo changes, for mostly political reasons, i.e. Reduced exhaust emission requirements for catalyst longevity, that does not mean that it destroys engines.

I continue to favor Brad Penn for my LT-5, but I would not hesitate using Mobil One 0-40, and may even switch to it on my next change.

You may call me a Heathen, but I do have faith in companies such as Mobil and their products.

I do not believe or expect that this will change anyone's opinion, and that is OK.

Use whatever, as you wish.

Be happy!

Marty

[AirbusDriver]

Beaky Buzzard once said....you can't fool me because, I'm a moron. With that said, I'll rely on others. My 90 is scheduled to go to Haibeck and whatever he recommends is good enough for me.