
Originally Posted by
Excelerate Rep
I'm not saying Mobil 1 is a BAD oil, just that there are better options out there for not much more money. Say you do 2 oil changes a year and each one costs $20 more because you used a better oil. I personally would rather spend the $40/year.
Back around 2006 Mobil stopped using pure synthetic base stocks (PAO) in their Mobil 1 oils, which essentially downgraded them from a group IV (PAO) to Group III (hydrocracked dino oil). They originally were trying to sue Castrol for doing this with some of their oils while retaining "synthetic" wording in their products, they lost and essentially said "if you can't beat 'em, join 'em" and did the same with their oil.
I ran Mobil 1 in my B5 A4 1.8T the entire time I owned it, I also ran a gigantic WIX filter that is actually for a Volvo diesel but has all the same valve opening pressures etc. and never had an issue, but I now prefer to run a "better" oil even if it costs a bit more.
If you run Mobil 1 and are happy... continue to do so. I only switched because of the downgrade info I have read and because it isn't a " VW approved" oil.
Excelerate, please don't take this the wrong way, but you are misinformed on this subject.
Mobil 1 is a synthetic oil, plain and simple. Group III is a synthetic basestock, despite the smear-campaign everyone runs against it. Hydrocracking is used by pretty much every major oil blender in the world and it is a tried-and-true process to create excellent oils. Focusing too much on the basestock is very narrowminded -- you should be looking at the overall package. If I had to venture a guess, I'd say that 3/4 of the VW 502/505 approved oils are hydrocracked. Even the overhyped Lubro-Moly and Motul 8100 oils are group III.
I won't get into the history lesson of Castrol vs. Mobil on the "synthetic labeling" fiasco, but in the end it comes back to my above point:
if they can offer the performance of group IV and group V with a less expensive product, why wouldn't they do it?
Mobil's VISOM group III+ basestocks are some of the best in the world. It is a proprietary basestock they spent billions of R&D on:
http://www.bobistheoilguy.com/forums...Number=1990677
Shell has similar offerings in the form of XHVI and GTL.
Mobil themselves said:
The Mobil 1 formulation strategy has always been based on selecting the best components available. We now have the very high quality Group III+ base stock, ‘Visom’ exclusively available to ExxonMobil. As we developed the Mobil 1 ESP technology
we found that combining Visom with PAO could deliver a formulation of equivalent performance to an all PAO formulation.
In other words, their group III oil mixed with a tad of group IV could match the all-group IV formula!
And lastly,
Mobil 1 0w40 is a VW 502/505 approved oil:
http://www.audiusa.com/content/dam/a...e-Bulletin.pdf
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