Ultimate Motor Oil Thread or Why we hate CJ4/SM oils

[M.D. Holloway]

I just spent a few hundred bucks looking at several different consumer oil analysis kits. I took a bunch of samples and sent them into a few different labs along with a sample to Southwest Research . The labs included Blackstone as well as Titan and a few others. I considered time response for the data, ease of use, and accuracy. I charted it up and found a company that wins hands down...check it out:

https://www.zenginescore.com/zengine-kit/zengine-kit

[RDM]

Are you intending to provide some evidence, or just a link to one of the labs?

[moparrob]

So who was the hands down winner?

[M.D. Holloway]

Originally Posted by RDM

Are you intending to provide some evidence, or just a link to one of the labs?

I can if you want. I have it on a spreadsheet. The Zengine was the winner according to my research...

[hughc]

I'm fortunate that the Irving oil Co. has their main offices in my community and they do my oil analysis for $23. Needless to say I am very pleased as I just drop the sample off and they reply within a couple of days.

[spedrcr]

Originally Posted by M.D. Holloway

I can if you want. I have it on a spreadsheet. The Zengine was the winner according to my research...

The spreadsheet plus an explanation of your conclusions would be helpful for sure.

[RDM]

Originally Posted by spedrcr

The spreadsheet plus an explanation of your conclusions would be helpful for sure.

And methods. And metrology, if any.

[333pg333]

Still really curious to reactions of this guy's claims. Charles?

https://540ratblog.wordpress.com/2013/06/20/motor-oil-wear-test-ranking/

[HarryD]

Originally Posted by 333pg333

Still really curious to reactions of this guy's claims. Charles?

https://540ratblog.wordpress.com/2013/06/20/motor-oil-wear-test-ranking/

I’m no pro but I found the article interesting but does not address the specific needs of air cooled motors with heavier oils.

[333pg333]

Originally Posted by HarryD

I’m no pro but I found the article interesting but does not address the specific needs of air cooled motors with heavier oils.

Interestingly he does advocate VR20w/50 for air cooled motors but as it's long and not so user friendly, you have to persist through that blog to find it.

[cnavarro]

Originally Posted by 333pg333

Still really curious to reactions of this guy's claims. Charles?

https://540ratblog.wordpress.com/2013/06/20/motor-oil-wear-test-ranking/

There is a lot there I don't agree with. Plus it's almost ten years out of date at this point. Most every oil has changed since then.

[cnavarro]

Originally Posted by 333pg333

Interestingly he does advocate VR20w/50 for air cooled motors but as it's long and not so user friendly, you have to persist through that blog to find it.

VR1 has changed as well for what it is worth. They used the same additive package from Lubrizol that was also used by DA for Penn Grade. When Lubrizol discontinued it, the oil had to be reformulated. Not to say either of these oils aren't good.

What matters is how well it works in your engine for how you drive your car and the only way to evaluate this is to do used oil analysis.

It's for that reason the watercooled guys all use Driven DT40. The wear levels are consistently the lowest with DT40. DT50 is still the oil I recommend for aircooled Porsche models.

[winders]

The DT oils are not recommended for engines with catalytic converts…

[333pg333]

Originally Posted by cnavarro

There is a lot there I don't agree with. Plus it's almost ten years out of date at this point. Most every oil has changed since then.

He claims that the blog was last updated 2 days ago. What's your opinion of Quacker state products?

Originally Posted by cnavarro

VR1 has changed as well for what it is worth. They used the same additive package from Lubrizol that was also used by DA for Penn Grade. When Lubrizol discontinued it, the oil had to be reformulated. Not to say either of these oils aren't good.

What matters is how well it works in your engine for how you drive your car and the only way to evaluate this is to do used oil analysis.

It's for that reason the watercooled guys all use Driven DT40. The wear levels are consistently the lowest with DT40. DT50 is still the oil I recommend for aircooled Porsche models.

Yes, I've been recommended to run DT40 in my newly built water cooled race engine.

[333pg333]

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[333pg333]

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[333pg333]

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[cnavarro]

Originally Posted by winders

The DT oils are not recommended for engines with catalytic converts…

It will not be an issue. Remember, the ZDDP levels found in DT40 are right in line with what oils had even as late as when the Boxster and 996 were released. Wasn't an issue then or in the past.

I did contact Driven about this and suggested their website should be updated to say this instead:

Driven DT oils do not meet ILSAC GF-6A, GF-6B, and API SP standards and is not recommended for vehicles with particulate filters or where emission system or LSPI protection is required; Driven DI oils are recommended for these applications.

[cnavarro]

Originally Posted by 333pg333

He maintains that the blog has been updated as recently as 2 days ago. What is your opinion of Quaker state oils? He rates these very highly.

Yes, I've been recommended to run DT40 in my newly built water cooled race engine. They recommend going up in viscosity if you use E85 and then again if it's turbocharged. Does that sound right to you?

I never recommend the DT oils for race use. If you are going to the track, a race oil should be used such as Driven XP9, which would be used in place of the DT40.

And with regards to his blog, it might have added info, but there tons of out of date info this is piled on to.

At this point, any oil you can purchase at your local auto parts store isn't suitable for any of our cars.

[cnavarro]

I did hear back from Driven's tribologist and he said they must follow the NIST Unform code for packaged motor oils as there are labeling requirements, so that is why the change was made to the website. However, the catalytic converter statement was incorrectly added to the DT oils.

Leave it to the government to f*** things up.

Regardless, there is nothing to worry about.