My Quest for Good Cheap Oil

[SC Maintenance]

The 410K Jeep 4L on Supertech does say a lot about Jeep 4L, but also Supertech, IMO. We know it's a good design of engine, but we also know the oil was adequate. Maybe better than adequate.

Perhaps with a better oil it might have gone 500K. We'll never know.

Jeep 4.0L - which really was a American Motors based on General Motors inline 6 - someone posted the history here a while back - was a great engine that would go 400K on whatever ancient slop you find in the back of the garage. So it really doesn't tell you anything special about Supertech - either way.

Nissan VQ40 - 4.0L V6 - also great engine. Mine has 414,000 now on whatever conventional or blend I could find for cheap. I believe I ran Suptertech once because I found some in the clearance section but mostly cheap branded conventional. So some engines just run forever. Here is under the valve covers at 395,000 https://bobistheoilguy.com/forums/t...vers-395-000-miles-nissan-xterra-vq40.376175/

 

[altaylar]

You've tracked on Kirkland oil? Did you get a UOA?

G

Thread 'Kirkland FS 5w-30, 3000 hard miles, 2019 Honda Civic Type-R'

Jan 21, 2022

Hello All..

Long time lurker here and finally did my first UOA

3000 miles on this 5w-30 kirkland oil. Honda spec'ed this car for 0w-20

I had a few people mention this oil isnt impressive because it sheared to a high 20 weight despite the results being excellent. Shearing didnt result in more wear metals and even blackstone mentioned its harmless.

What do you all think?

Here is how the oil was used:
3 track days. 2 at Thunder hill west(about 95-100 degrees both days) and 1 at Laguna Seca(65 degrees that day)
Lots of short trips where the oil doesnt get to full operating temperature
A...

• gtical
• Replies: 25
• Forum: Used Oil Analysis - Gasoline

• 

I also have a sample with 4 track days, that i am yet to ship

 

[Javed]

Jeep 4.0L - which really was a American Motors based on General Motors inline 6 - someone posted the history here a while back - was a great engine that would go 400K on whatever ancient slop you find in the back of the garage. So it really doesn't tell you anything special about Supertech - either way.

Nissan VQ40 - 4.0L V6 - also great engine. Mine has 414,000 now on whatever conventional or blend I could find for cheap. I believe I ran Suptertech once because I found some in the clearance section but mostly cheap branded conventional. So some engines just run forever. Here is under the valve covers at 395,000 https://bobistheoilguy.com/forums/t...vers-395-000-miles-nissan-xterra-vq40.376175/

I think after 36 years on crap, this 4.0L now deserves some Super Tech goodness.

 

[Carlostrece]

The oil had nothing to do with pre-existing mechanical issues.

Mobil One 0w40 had something to do with blue exhaust smoke at startup and extra noise at startup. The two 5w30 Maxlife oils I used after that did not have those issues. It's now 60K miles later and those issues have not returned.

 

[Carlostrece]

Which mechanical issues did he have that started when he used Mobil 1 and went away with a different oil?

See my posts 174 & 184.

 

[tired]

You tell me, likely failing valve stem seals, like I said the oil had nothing to do with it.

I don’t know his car. Why would failing valve seals get better with one oil vs another? I’m not trying to argue here. Earnest question.

 

[tired]

See my posts 174 & 184.

I’m aware of those posts. He seems to be ascribing this to a mechanical issue not the oil. And I’m asking what mechanical issue would change so drastically with a different oil.