Method for improving the corrosion inhibiting prop

[jmac]

Method for improving the corrosion inhibiting properties of lubricant compositions

"[0026] It has also been discovered that replacing at least part of the mineral oil base oil or polyalpha olefin (PAO) base oil in apparatus lubricating oils, especially aviation piston engine lubricating oil compositions with one or more hydrodewaxate or hydroisomerate base stock(s) and/or base oil(s), GTL material derived base stock(s) and/or base oil(s), or mixtures thereof, preferably GTL base stock(s) and/or base oil(s), maintains the thermal and oxidative stability with sufficient solvency to reduce engine deposits provides good low temperature properties and improves resistance to corrosion. The viscometric properties of the lubricant oil composition are also improved. The lubricant oil composition also provides unexpectedly improved rust protection and has a low sulfur content."

Linky

 

[CATERHAM]

Am I interpreting correctly in concluding GP III oils offer better corrosion protection for engines in storage?

 

[jmac]

I have not read the entire patent yet, but perhaps Molecule could comment.

 

[Steve S]

Some have suggested the best oil basestocks are blended.

 

[d00df00d]

You mean Group III basestocks are actually good for something after all?? GASP!

You'd better keep this a secret. If BITOG gets wind of this, it'll be chaos...

 

[jmac]

I think it is safe down here in this section, most in the car oil section will never know about it.

 

[MolaKule]

You have to read the complete patent and not just take snippets otherwise, the whole context is lost.

What the EXOM patent is saying is that an aviation piston oil can be made by using GTL (or PIO's or polyinternalolefins) and or GIII base oils with a suitable anti-corrosion additive (corrosion and rust inhibitors).

This set of mixtures showed low pour points, very low corrosion, and low oxidation.

This is to be expected since GTL and Group III oils have very low sulfur content, but not as low as PAO's and Esters which have zero sulfur.

http://en.wikipedia.org/wiki/Gas_to_Liquid

 

[Steve S]

Mola isn't some sulfer good ?

 

[MolaKule]

Sulferized olefins are good as EP additives in gear oils which see no combustion.

You want a minimum of ash producing elements in a combustion chamber so as to not produce valve and top cylinder deposits.

 

[jmac]

Originally Posted By: MolaKule
You have to read the complete patent and not just take snippets otherwise, the whole context is lost.

What the EXOM patent is saying is that an aviation piston oil can be made by using GTL (or PIO's or polyinternalolefins) and or GIII base oils with a suitable anti-corrosion additive (corrosion and rust inhibitors).

This set of mixtures showed low pour points, very low corrosion, and low oxidation.

This is to be expected since GTL and Group III oils have very low sulfur content, but not as low as PAO's and Esters which have zero sulfur.

http://en.wikipedia.org/wiki/Gas_to_Liquid


Well see, that right there is what is not said often enough, and is interesting!