Lucas X-tra HD Green Grease for front Axle?
- Thread starter danmcph
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jblueridge
SILVER Star
No one wants to say Yes because of lawsuits.
- Thread starter
- #3
What do you mean by lawsuits? Is Lucas part of one? Are you saying people are afraid to answer because I would sue them if their advice was bad? I'm not tracking.
Is there a preferred grease here on Ih8mud for these two applications?
Is there a preferred grease here on Ih8mud for these two applications?
jblueridge
SILVER Star
I do not want to tell you to go ahead and use your preferred grease because your truck might break 4 years from now and I will get sued.
I might go out and buy some of the Lucas grease myself because it looks very good to me.
I might go out and buy some of the Lucas grease myself because it looks very good to me.
Hey Dan, I see you've gone and bought a separate product, but I'll give you a rundown for future reference.
A "moly grease" contains molybdenum disulphide, which is an Extreme Pressure (EP) additive. Anywhere that you have very high contact pressures or sliding contact which may displace a grease, you'll typically want a grease with an EP additive. The same is true for oils. This is why gear oils for hypoid gearsets are typically marked "EP".
EP additives traditionally aren't great for high speed bearings, as they can cause skidding of rolling elements due to the moulding of the EP component from contact pressure. For this reason, a conventional lithium grease is recommended.
Modern lubricants have come a very long way however. Some are suitable for both high speed bearings as well as EP applications. Not all manufacturers specify their exact performance, so if in doubt, meet or exceed factory specifications.
A "moly grease" contains molybdenum disulphide, which is an Extreme Pressure (EP) additive. Anywhere that you have very high contact pressures or sliding contact which may displace a grease, you'll typically want a grease with an EP additive. The same is true for oils. This is why gear oils for hypoid gearsets are typically marked "EP".
EP additives traditionally aren't great for high speed bearings, as they can cause skidding of rolling elements due to the moulding of the EP component from contact pressure. For this reason, a conventional lithium grease is recommended.
Modern lubricants have come a very long way however. Some are suitable for both high speed bearings as well as EP applications. Not all manufacturers specify their exact performance, so if in doubt, meet or exceed factory specifications.
- Thread starter
- #7
Does anyone have experience with Li400? The maker claims it is safe for bearings but uses a ceramic component instead of Moly for the EP function.
Li400 -German Made
Li400 -German Made
As a chemical engineer I'd say:
At high temps, MoS2 may decompose to (agressive) sulphur compounds, which may corrode a bearing. As @Jawsh correctly said, MoS2 greas is rather for comparably slow rotations, leading to moderate temperatures.
The said L400 I understand to be for high revs hot environments such as aircraft turbines. I have no experience with it, though.
Cheers Ralf
At high temps, MoS2 may decompose to (agressive) sulphur compounds, which may corrode a bearing. As @Jawsh correctly said, MoS2 greas is rather for comparably slow rotations, leading to moderate temperatures.
The said L400 I understand to be for high revs hot environments such as aircraft turbines. I have no experience with it, though.
Cheers Ralf
