Mobil Delvac Extreme 15W-40 CK4
- Thread starter TOLSON
- Start date
I am wondering what HTHS of this oil is?
It’s 4.1. I looked it up last night. Kinda light for a 15w40
How did I missed that HTHS. I think that HTHS is pretty good for HC oil.
Typical Blackstone misreporting.
I'm guessing the sodium is crossover/interference.
I'm guessing the sodium is crossover/interference.
Mobil also makes a Delvac Extreme synthetic 10w30 as well. Didn’t know about that. Not many synthetic options out there for 10w30, nice to know amsoil and RLI arent he only ones offering it now.
High Performance Lubricants makes an HDEO in 10w-30 as well. I'm running it in my Tahoe currently.
Where do you buy there products? Do they have an e-commerce site?
Does HPL pubically publish their PDS ? I clicked on the link at their home page and it requires a login.
Nevermind I found it here. Thanks
TBN of 4.7 on the first run and a rerun showed 8.5. That is a HUGE variance. Which value are you going to believe? The website's 10.3? 4.7? or 8.5? Does Blackstone have an explanation for why the variance is that big? Did they say it was a problem with the way you collected?
It would be interesting to send in a UOA at 5,000 miles and see if the TBN goes up. If it does, then nothing is believable from Blackstone.
It shows that testing oil is not trivial and decisions should not be based on $30 analyses.
I've been in HPL's lab and have witnessed the process of calibrating equipment before tests are run, including TBN. If you want repeatable and predictable test results, to say it is not trivial is an understatement.
You can't run samples through quickly and expect accurate results.
When I performed oil analysis samples in college we ran a standard prior to and directly after each sample. It was a futzy thing to do but it was what the ASTM procedure required.
Exactly. I know when HPL uses ICP in their lab, they will focus on each element for up to 5 minutes. The mass labs like Blackstone, ALS, and Polaris... 10 seconds each, 15 max.
And the ICP manufacturer's recommended calibration takes about an hour. HPL has designed their own calibration that takes three hours and give them more consistent testing results.
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