High Milage Mobil ! ???

[kallekula]

I’ve seen their Kirkland oil but I haven’t tried it yet. I used Oreillys own oil last time I changed oil on my S70,

[vtl]

Redline 5W30 oil

Red Line has a lot of calcium, be careful if the engine started to consume oil. Oil burns off, calcium forms a cement-like deposits, which flake off and get trapped between valve face and valve seat.

This is my engine after years of Red Line and some oil consumption slowly growing up for a longer period, due to worn valve seals.



The exhaust valves were badly pitted, too.

The other T2 engine that I took apart for my own education, it was a typically neglected engine, with long OCI and who knows what oil used. But the head was cleaner, and took all the exhaust valves from it for my engine rebuild.

I switched to Mobil 10w40. The best oil does not mean the engine will live longer if the problems are not addressed timely.

[MoVolvos]

I’ve seen their Kirkland oil but I haven’t tried it yet. I used Oreillys own oil last time I changed oil on my S70,

Kirkland does not have a 0W or 5W40 oil. I am currently experimenting with their 15W-40 due to a prior sale purchase. Caveat is adding Swepco 5W30 as an additive package for winter as it has high TBN numbers, ZDDP and Boron for extra protection.

With SoCal weather you should be able to use the Kirkland 5W-30 if it's a daily and you are not hotly exercising the turbo all the time. Rotella T6, Castrol Titanium then Kirkland in terms of how robust the engine feels through out the RPM ranges on several vehicles from new to upwards of 230K miles.
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https://www.costco.com/CatalogSearch?de ... =Motor+Oil
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On sheetrock and Rock Wool back drop . Hope to install soon after finishing the Rock Wool in the attic this week.
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IMG_20220929_125629494.jpg (480.5 KiB) Viewed 426 times

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[erikv11]

Wow, a little hand-placed sticker with the oil weight does NOT give much confidence ...

[June]

Redline 5W30 oil

Red Line has a lot of calcium, be careful if the engine started to consume oil. Oil burns off, calcium forms a cement-like deposits, which flake off and get trapped between valve face and valve seat.

This is my engine after years of Red Line and some oil consumption slowly growing up for a longer period, due to worn valve seals.



The exhaust valves were badly pitted, too.

The other T2 engine that I took apart for my own education, it was a typically neglected engine, with long OCI and who knows what oil used. But the head was cleaner, and took all the exhaust valves from it for my engine rebuild.

I switched to Mobil 10w40. The best oil does not mean the engine will live longer if the problems are not addressed timely.

As of this year my cylinders have no calcium build up, nor pitted like yours. What happened to the piece of missing valve? Perhaps the chunk of valve pitted that cylinder? Redline has protected my engine according to my mechanic who thoroughly inspected each cylinder visually and also for compression before replacing both turbos and the catalyst. I personally watched all 6 cylinders on a video, also later inspected both exhaust manifolds with turbos and intake manifold on his bench. The zinc in the Redline did damage the catalyst over 30-40K of oil consumption due to the drivers side turbo seal. Now at 220K back to no oil consumption. Also I have 99.9% of the time use only Shell Premium. In the car's early years Shell Super Premium 95 octane until Shell discontinued it. Also my car has always had dealership installed factory parts with the exception of the engine oil. June

[kallekula]

Shootout Kirkland (Costco) vs SuperTech (Walmart):

In the end it’s mentioned that the two oils plus some cheap Amazon oil is probably the same oil.
Overall the oil seems to perform pretty good.

[vtl]

What happened to the piece of missing valve? Perhaps the chunk of valve pitted that cylinder?

It burnt off and flew away. Probably stuck in TWYC. No, it did not pit anything. It was probably melted down to fluid when it departed the valve.

Redline has protected my engine according to my mechanic who thoroughly inspected each cylinder visually and also for compression before replacing both turbos and the catalyst.

Yes, my engine (Amsoil SS/Red Line, premium gas only for the past 10 years) had 1/3 of the bore wear in all cylinders, compared to a regular beaten engine with similar mileage. However, that poor beaten engine was taken out of a road-worthy car, while my apparently had a small problem