Amsoil Series 2000 0W30 (SL), 21,000 miles, !992 Ford Aerostar 3.0

[buster]

quote:

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Lowering the initial viscosity does nothing to prevent thickening

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That is what I thought. It also doesn't mean a different base oil is being used, just a different ratio of different viscosity basestocks.

 

[Pablo]

You guys aren't reading what I wrote.

 

[ekpolk]

Pablo:

Can you offer some more info on the remixing strategy that is apparently in the works for these otherwise respected oils? I do realize that most of these products will be updated three or four times before I use up all of my GC

, but I still like to stay ahead of developments.

 

[Pablo]

I don't have intimate details, but starting with a lower vicosity, higher solvency PAO does help prevent thickening. The main reason the 3 oils thickened was general lack of solvency in the higher vis PAO's selected. The older PAO's were some of the best selected for barrier protection as witnesed by the good UOA metals, but left little room for shear thinning - they basically never sheared.

 

[Winston]

Lowering the initial viscosity does nothing to prevent thickening.

Why do some oils thicken and others don't?

 

[blupupher]

Posted By Pablo:

quote:

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blup - It's 35K or 1 year for non-severe use:

Usage brochure

17,500 miles if severe. The oil did thicken, but 1 year was coming up, and LA driving is usually closer to severe than not.

Thanks Jan for the dedication!

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OK, then that makes more sense. It is doing it's job as designed.