I saw a topic about synthetics and VII's and some that might not need any to be a 10/40 or something like that.
My question is of the Mobil Supersyn oils which ones in order would have less VII's ? Does any of that make sense about what I am asking ![[Confused]](images/icons/confused.gif)
![[Confused]](images/icons/confused.gif)
quote:Problem is, the people answering the tech lines probably don't know the answer to this question. I'd bet the farm on it.
Originally posted by Jay: Pops, why not call Mobil1? They are happy to answer your questions.
quote:I have read that the Delvac 1 has metallic additives. Would those polish the bore like a fine abrasive overtime? Dragboat asked the same question in another thread. It was not replied to. Those deisel piston rings are huge compared to a gas motor. I would want some more verification this type oil is good for long term use in a gas motor before I used it. Does Delvac 1300 use the metallic additives as well? Thats the one I am more interested in or the Delo 400 possibly. Are these used as a detergent or something like a dispersent? I am new to this as you can probably tell
Originally posted by Ken: Pops, Get Mobil Delvac 1 5W-40 diesel & gasoline engine lube oil. It should do fine. Do you really need 50 wt. oil? If so, get the 15W-50...but be sure you really need it. Don't say that everyone doesn't like VII. They work great and do a job. Yes, too high a proportion of VII can be a problem, but synthetic oils naturaly have a higher viscosity index and therefore need a smaller proportion of VIIs. Not a problem. Ken
quote:Pops, You raise a good question none seen to want to address it. I think they would be like fine abrasives and polish the bore over time. Some of the Exotic gas motor oils use these in the formulation for another reasin but they are in race motors for a short time then the motor is gone through. A diesel's ring is, well it will just seal beter through it's size and the compression forcing it into the cylinder wall. Also ,the ring tension used in those are much higher than a PCM. A gas oil for a gas motor, diesel oil for a diesel is my opinion if a mettalic additive is used. Now show me the cross hatch left in a cylinder after 150k in a gas motor using Delvac 1 and I will eat my words
Originally posted by Pops:quote:I have read that the Delvac 1 has metallic additives. Would those polish the bore like a fine abrasive overtime? Dragboat asked the same question in another thread. It was not replied to. Those deisel piston rings are huge compared to a gas motor. I would want some more verification this type oil is good for long term use in a gas motor before I used it. Does Delvac 1300 use the metallic additives as well? Thats the one I am more interested in or the Delo 400 possibly. Are these used as a detergent or something like a dispersent? I am new to this as you can probably tell
Originally posted by Ken: Pops, Get Mobil Delvac 1 5W-40 diesel & gasoline engine lube oil. It should do fine. Do you really need 50 wt. oil? If so, get the 15W-50...but be sure you really need it. Don't say that everyone doesn't like VII. They work great and do a job. Yes, too high a proportion of VII can be a problem, but synthetic oils naturaly have a higher viscosity index and therefore need a smaller proportion of VIIs. Not a problem. Ken![]()
quote:Use a boroscope then.
Originally posted by sprintman: Again D1 is not a diesel oil it is a fleet oil (CI-4/SL). Used it in 3 vehicles but can't honestly say "the cross hatch is still there". I don't intend stripping motor to see either, the motors run too well.
quote:
Originally posted by Pops: I have read that the Delvac 1 has metallic additives...