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Mobil 1 Grease for CV joint, is ok?


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2 replies to this topic

#1 yarikoptic

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Posted 12 March 2007 - 10:09 PM

Whenever I was in the store looking for Mobil 1 for the bearing I saw two tubes of Mobil 1 -- 1 had mentioned CV joints as well in the list of applications. Otherwise I didn't spot obvious difference but since the one "with CV in the list" was the last and opened can I chose regular Mobil 1. Now I can't find online examples of the other one.
Mobile 1 I have lists applications: "suspension ball joints, universal joints, steering linkages and chassis". Since our drive shafts are not based on universal joints I question application of Mobil 1 to pack them (although I found quite a few instances online where people reported packing with Mobil 1) since Mobil 1 is light (if there is any) on moly content which seems to be common for CV joints greases.
The basic requirements for a CV joint grease are that it be a high-tact grease (meaning it will stay where it is placed) and that is must have lots of poly-sulfide strands, which handle pressure well (essential in CV joints) and will stay put (see first requirement). Mobil 1 synthetic grease has light tact (due to a lack of a sufficient amount of poly-sulfide) and is not suitable for CVs.

So I guess I should better get a moly containing grease right away or just mix Mobil 1 with a compatible grease following the chart.

#2 LegAC

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Posted 13 March 2007 - 12:24 AM

Whenever I was in the store looking for Mobil 1 for the bearing I saw two tubes of Mobil 1 -- 1 had mentioned CV joints as well in the list of applications. Otherwise I didn't spot obvious difference but since the one "with CV in the list" was the last and opened can I chose regular Mobil 1. Now I can't find online examples of the other one.
Mobile 1 I have lists applications: "suspension ball joints, universal joints, steering linkages and chassis". Since our drive shafts are not based on universal joints I question application of Mobil 1 to pack them (although I found quite a few instances online where people reported packing with Mobil 1) since Mobil 1 is light (if there is any) on moly content which seems to be common for CV joints greases.
The basic requirements for a CV joint grease are that it be a high-tact grease (meaning it will stay where it is placed) and that is must have lots of poly-sulfide strands, which handle pressure well (essential in CV joints) and will stay put (see first requirement). Mobil 1 synthetic grease has light tact (due to a lack of a sufficient amount of poly-sulfide) and is not suitable for CVs.

So I guess I should better get a moly containing grease right away or just mix Mobil 1 with a compatible grease following the chart.


I wouldn't personally get too caught up in what a compound does or does not contain. Either it is recommended for a specific application or it is not.

Molybdenum is a great anti-wear additive, but isn't found in some motor oils. Does that make those oils bad? No, it just means that they've found other additives to substitute for the traditional Moly content.

Everything you say is more than likely true. I haven't done too much investigation on axle lubes. I would just call mobil and see if it gets their blessing. I agree that a slight tact may not be the best choice, but sometimes synthetic compounds can get away with certain things that a conventional product couldn't.

#3 porcupine73

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Posted 13 March 2007 - 11:16 AM

I would use the grease only if it specifically says good for CV joints. Generally CV joint greases are great for wheel bearings too, but not the other way around. Redline CV-2 from a race shop or summitracing.com might be a nice choice.

If the joint you're working on can't be fully disassembled to flush out all the old grease, then I'd stick with OE grease. Not all greases mix well together. If you order a kit from a dealer or online dealer, you'll get a nice new boot, bands, and grease.




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