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Wheel bearing grease discussion #5391424 04/01/20 11:10 PM
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Zahndkile Offline OP
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So I have been researching grease because I need to service my front wheel bearings in my 2000 F350.

So I came up with 3 options and I am trying to decide which one is best.

I am trying to decide between
Mobil 1 synthetic
Mobility SHC 100
Mobil SHC Polyrex 462 (or 222)

I would like to discuss grease qualities and application.
I don't want to restrict the discussion to those greases I just want to keep it scientific.

Re: Wheel bearing grease discussion [Re: Zahndkile] #5391430 04/01/20 11:22 PM
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Chris142 Offline
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Valvoline moly wheel bearing grease for Ford vehicles.


02 Wrangler Napa high milage 10w40
87 F250 Valvoline 15w40
07 fjcruiser Car lube plus 10w30
Z400 castrol T 10w40
Can am Maveric edge 5w40
57 case tractor Chevron sae30
Re: Wheel bearing grease discussion [Re: Chris142] #5391432 04/01/20 11:27 PM
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Zahndkile Offline OP
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So it passes ford requirements but I don't find a spec sheet on the valvoline website so I am not sure how to compare it.

Re: Wheel bearing grease discussion [Re: Zahndkile] #5391435 04/01/20 11:34 PM
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Zahndkile Offline OP
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[Linked Image]

So here are some of the specs for the SHC Polyrex greases.
I just don't know how to interpret the data. I understand oil at least somewhat but grease has me a bit lost.

Re: Wheel bearing grease discussion [Re: Zahndkile] #5391437 04/01/20 11:37 PM
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j_mac Offline
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Ford's been doing the "Special Moly EP" thing since at least the 80's. I'd just make sure those synthetics meet Ford's EP (extreme pressure) spec. Just because they say synthetic doesn't mean they lubricate better. I guess their advantage is in extreme high temp situations as in descending a 10 mile long hill on the brakes while hauling 10,000lb.

Re: Wheel bearing grease discussion [Re: Chris142] #5391438 04/01/20 11:41 PM
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Chris142 Offline
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I can tell you that it's all I use. When I got my truck (used with no known history) a few weeks later it burned up a wheel bearing. I fixed it on a sunday. I had to source bearings and races from several places to make up enough parts to replace the damaged bearings. Most from china. Iirc one race was made in argentina.

They have been in there for 60,000 miles with no issues. I am sold on that grease.


02 Wrangler Napa high milage 10w40
87 F250 Valvoline 15w40
07 fjcruiser Car lube plus 10w30
Z400 castrol T 10w40
Can am Maveric edge 5w40
57 case tractor Chevron sae30
Re: Wheel bearing grease discussion [Re: Zahndkile] #5391439 04/01/20 11:43 PM
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Zahndkile Offline OP
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[Linked Image]

This is the spec table for SHC 100 aircraft wheel bearing grease.

Re: Wheel bearing grease discussion [Re: Zahndkile] #5391440 04/01/20 11:43 PM
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clinebarger Offline
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Timken GR224C is what I've always used. Clean the bearings & hub real well & Pack the bearings. Replace the grease seals as needed. Snug the nut a few times to seat the bearings then back off @ 1/8 turn.

Most pack the hub & cap with grease...Like the grease is going to jump back in the bearing LOL

Procedure is more important than the grease in my opinion, Running the bearings too tight & Too much Negative Camber is what kills serviceable tapered front wheel bearings. Twin I-Beam Fords are known for excessive negative camber as the coil springs collapse & ball joints wear.


2001 Chevy Camaro L92/4L80E
2006 Chevy 2500HD LBZ/Allison 1000
2010 Toyota Corolla 2ZR-FE/U341E
2000 Toyota Avalon 1MZ-FE/A541E
Re: Wheel bearing grease discussion [Re: Zahndkile] #5391441 04/01/20 11:45 PM
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Zahndkile Offline OP
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Originally Posted by Zahndkile
So I have been researching grease because I need to service my front wheel bearings in my 2000 F350.

So I came up with 3 options and I am trying to decide which one is best.

I am trying to decide between
Mobil 1 synthetic
Mobility SHC 100
Mobil SHC Polyrex 462 (or 222)

I would like to discuss grease qualities and application.
I don't want to restrict the discussion to those greases I just want to keep it scientific.


Mobility was supposed to be Mobilith. (Thanks auto correct)

Re: Wheel bearing grease discussion [Re: j_mac] #5391442 04/01/20 11:52 PM
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Zahndkile Offline OP
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Originally Posted by j_mac
Ford's been doing the "Special Moly EP" thing since at least the 80's. I'd just make sure those synthetics meet Ford's EP (extreme pressure) spec. Just because they say synthetic doesn't mean they lubricate better. I guess their advantage is in extreme high temp situations as in descending a 10 mile long hill on the brakes while hauling 10,000lb.


I just wonder how much merit fords molly requirement has. I want to see a test that shows that it actually reduces wear or something.
I also have access to a drum of ford spec molly grease but i like researching to decide what may be the best.

Re: Wheel bearing grease discussion [Re: clinebarger] #5391447 04/02/20 12:04 AM
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Zahndkile Offline OP
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Originally Posted by clinebarger
Timken GR224C is what I've always used. Clean the bearings & hub real well & Pack the bearings. Replace the grease seals as needed. Snug the nut a few times to seat the bearings then back off @ 1/8 turn.

Most pack the hub & cap with grease...Like the grease is going to jump back in the bearing LOL

Procedure is more important than the grease in my opinion, Running the bearings too tight & Too much Negative Camber is what kills serviceable tapered front wheel bearings. Twin I-Beam Fords are known for excessive negative camber as the coil springs collapse & ball joints wear.




I couldn't agree more.
I just enjoy the research and feeling like I made an informed decision.

Re: Wheel bearing grease discussion [Re: Zahndkile] #5391449 04/02/20 12:12 AM
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Zahndkile Offline OP
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My thought is they are just tapered roller bearings so if a grease is excellent for tapered rollers than it doesn't matter if it doesn't carry ford approval.
On the other hand if the ford grease is actually superior then I will pick a brand and go with it.

One nice thing is that grease compatibility is not a concern because the bearings will be completely cleaned before being re greased.

Re: Wheel bearing grease discussion [Re: Zahndkile] #5391455 04/02/20 12:22 AM
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Zahndkile Offline OP
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[Linked Image]

This is the spec chart for the Mobil 1 synthetic grease

Re: Wheel bearing grease discussion [Re: Zahndkile] #5391464 04/02/20 12:36 AM
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j_mac Offline
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The Ford "Moly EP" spec means its a grease that has been formulated with Molybdenum Disulfide. EP means it meets specs that qualifies it as an Extreme Pressure grease as in it can take higher loads.
Molybdenum Disulfide was known for decades as the best lubricating grease available. One of the harshest tests for a lubricant is breaking in a flat tappet camshaft. MoS2 (moly disulfide) grease was the standard cam assembly lube for decades. It must be great for wheel bearings. Ford has been specifying it for wheel bearings since at least the mid-80s.

Last edited by j_mac; 04/02/20 12:38 AM. Reason: misspelling
Re: Wheel bearing grease discussion [Re: j_mac] #5391467 04/02/20 12:41 AM
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Zahndkile Offline OP
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Originally Posted by j_mac
The Ford "Moly EP" spec means its a grease that has been formulated with Molybdenum Disulfide. EP means it meets specs that qualifies it as an Extreme Pressure grease as in it can take higher loads.
Molybdenum Disulfide was known for decades as the best lubricating grease available. One of the harshest tests for a lubricant is breaking in a flat tappet camshaft. MoS2 (moly disulfide) grease was the standard cam assembly lube for decades. It must be great for wheel bearings. Ford has been specifying it for wheel bearings since at least the mid-80s.


That makes sense.
I do wonder if there have been any advances in that time.

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