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ZDDP + MoS2 on engine oil #4043644 03/19/16 10:30 PM
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kr_bitog Offline OP
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I am wondering if ZDDP+MoS2 is worse than ZDDP+PTFE that some mention may be better than MoS2 alone on engine oil ? Appreciate if someone can explain why ZDDP + MoS2 is not preferred besides it poisons the catalyst ? Thank you.

Re: ZDDP + MoS2 on engine oil [Re: kr_bitog] #4043683 03/20/16 12:42 AM
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DoubleWasp Offline
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Where ZDDP is concerned, it is arguably better to use an engine oil that already comes with preferred levels of ZDDP, as opposed to messing with the formulation of an existing oil.


07 Lincoln Navigator M1 0w-40/FU
68 Charger R/T / Supercharged 440 VR1/DBL7349
07 Ram 3500 4x4 / Cummins 6.7 /DBL7349
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Re: ZDDP + MoS2 on engine oil [Re: kr_bitog] #4043707 03/20/16 02:28 AM
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kr_bitog Offline OP
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Thank you, I agree not to mess the oil formulation especially on newer car. however on this case, the mixture is to address the high mileage engine that start consuming oil. since the MoS2, MOS and 5w-40 oil alone does not really reduce the oil consumption and seems makes the engine sound worse (for MOS), i have tried to add the MoS2 on the current oil. Interestingly the sound and mpg getting better, however just wonder if there is really problem to mix those two in the oil.

Re: ZDDP + MoS2 on engine oil [Re: kr_bitog] #4043777 03/20/16 06:31 AM
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NHGUY Offline
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On Fast & Loud they used plain oil (O'Reilly?) and a ZDDP additive to break in a rebuilt engine.In short order it had issues and metal shavings were found.The engine had to be torn down again and that time they used "Proper" break in oil (some off brand performance oil) and had no issue.They seemed to blame the oil,but I bet there was more to that story.

Re: ZDDP + MoS2 on engine oil [Re: kr_bitog] #4044556 03/20/16 11:45 PM
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Garak Offline
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At least one can argue that moly and ZDDP do have a place in engine oils. PTFE does not.


Plain, simple Garak.

2008 Infiniti G37 - Shell ROTELLA T6 Multi-Vehicle 5w-30, Wix 57356
1984 F-150 4.9L - Quaker State GB 10w-30, Wix 51515
Re: ZDDP + MoS2 on engine oil [Re: NHGUY] #4044581 03/21/16 02:34 AM
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Shannow Offline
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Originally Posted By: NHGUY
On Fast & Loud they used plain oil (O'Reilly?) and a ZDDP additive to break in a rebuilt engine.In short order it had issues and metal shavings were found.The engine had to be torn down again and that time they used "Proper" break in oil (some off brand performance oil) and had no issue.They seemed to blame the oil,but I bet there was more to that story.


Here's what they used...I was appalled.

Re: ZDDP + MoS2 on engine oil [Re: kr_bitog] #4110622 05/30/16 02:16 PM
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steve20 Offline
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Shannow--can you describe your attachment above? Image not found is what i get when i try to open it
Steve



Re: ZDDP + MoS2 on engine oil [Re: kr_bitog] #4110642 05/30/16 02:51 PM
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steve20 Offline
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thanks much smile ---never heard of it BTW



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