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Mobil Visom Group III + #1160814 05/28/08 04:04 PM
Joined: Nov 2002
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buster Offline OP
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http://www.lubereport.com/e_article000130105.cfm

 Quote:
At the high end of the scale, and made only in pilot plant quantities so far, are ExxonMobil's new Visom branded Group III+ base stocks. This product aims to meet one of Europe's most difficult engine oil specs, 0W-30. So far, marketers have needed to formulate with polyalphaolefins to meet the stringent cold-cranking, viscosity and volatility requirements of this grade.

Visom is created through wax isomerization, and has an impressive viscosity index of 140, thanks to its high paraffin content. (The name Visom was derived from combining "viscosity index" and "isomerization," Cox explained.) The product became possible after the ExxonMobil merger, and combines Exxon reactor hardware with Mobil catalyst technology, with engineering and research support from both. Basically, it upgrades slack wax to base stocks with high V.I., low volatility, excellent cold-cranking properties and what Cox called "superior" blending performance. Visom is primarily iso-paraffins, he pointed out, while competing Group III base stocks made from hydrocracker bottoms have significant naphthene content.

He went on to show how Visom's blending advantages and cold-cranking performance mean that 5W-40 engine oils can be made with 100 percent Visom base stock, without resorting to PAO, and at a lower additive treat rate. He also described how 0W-30 requirements can be met with Visom alone or with PAO alone (but not with competing Group III base stocks unless some PAO is included to achieve the cold-cranking limit).




2019 Frontier Pro 4X - RGT 5w30
2019 Impreza Sport - OE fill
Re: Mobil Visom Group III + [Re: buster] #1160827 05/28/08 04:21 PM
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MGregoir Offline
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Group III+, group IV and group V...Mobil 1 even if it's not all "synthetic" still probably has a base stock advantage.

I believe this is a very similar process to Shell's XHVI process which makes Group III+ for oils like their Helix line from hydrocracking slack wax.

Slack wax is a byproduct of group II and III production so they are taking something made from hydrocracking oils, then hydrocracking it into extremely high quality and only marginally "crude" based oils.

Last edited by MGregoir; 05/28/08 04:23 PM.
Re: Mobil Visom Group III + [Re: MGregoir] #1160835 05/28/08 04:33 PM
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LargeCarManX2 Offline
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In most cases....interesting to note that,


Group III and Group IV V retail for about the same $$$$


"Success is the ability to go from one failure to another with no loss of enthusiasm."
Sir Winston Churchill
Re: Mobil Visom Group III + [Re: LargeCarManX2] #1160896 05/28/08 05:51 PM
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buster Offline OP
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Probably the EP line.


2019 Frontier Pro 4X - RGT 5w30
2019 Impreza Sport - OE fill
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