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How often should i chg sc oil?





Debating on this forum = fighting.

People need to get over themselves and realize heated debates are how good points get proven.
 
Explicit_Spade said:
I've been considering this option for a while. What I gathered from the above is that it's going to break down more often than GM S/C oil, so change it more frequently, for the price I would change it every oil change.
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No where did I say it would break down faster. I don't know if it does that or not. What I will say is that it is not designed for this application.

Will it run 12k miles without issues. Obviously yes.
20k miles? Probably.
70k miles? Most likely.
250k miles? No ones knows.

But what we do know is that GM fluid is proven times and time again in this specific application because it was specifically designed for it and is what the manufacture of the supercharger recommends. This fluid has gone well over 200k miles in stock superchargers without issues. That is proven performance to me.

But to get to the root of the issue I have with just coming out and recommending people to run something not designed, not specified, and totally different than what is supposed to be in there is that it is not proven. Blue, you said:

Mobil 1 0W-30.

Like 4 bucks for a quart of it...and should last the lifetime of your car to be honest...or at least as long as you keep it.
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How do you know? These are people coming on here and reading this stuff that don't have any clue about cars and might just take your suggestion as gold. 50k miles from now, it could wipe out the gears on the rotor pack and cause an expensive fix. You don't know. So putting out a recommendation like that is not good practice in my book.
 
bluegtp91 said:
I haven't done them...Synthetic Shield (Scotty) did. Who is a AMSOil Tech. You can notice the temp drop by even touching it. Normally it scorches your hand if you grab onto it...now I can hold onto it. Like I said, some people like the idea...some people don't. Just because it costs more doesn't always mean it is the best route to take. ALSO, when GM ran out of S/C oil at dealerships, the recommened replacement is Mobil1 Synthetic. TLSheff even has pictures of the bulletin he took and posted here...which wasn't for public eyes, dealer employees only.

Dexcool is recommened by GM, you saw where that one went with the huge lawsuit.
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I was going with you 100% until you said "Amsoil Tech". :th_thumb-down:
 
Zef_66 said:
How do you know? These are people coming on here and reading this stuff that don't have any clue about cars and might just take your suggestion as gold. 50k miles from now, it could wipe out the gears on the rotor pack and cause an expensive fix. You don't know. So putting out a recommendation like that is not good practice in my book.
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Touche; I don't know how long it'll last. People also might take yours saying GM oil is the only thing you can use. Do you know the properties? My example earlier was the same. GM DESIGNED Dexcool to be safe, but it obviously wasn't...so how is this any different? I'd personally think, if it was going to fail...it should have by now. Scotty had over 110K on his car when the transmission shelled. His blower was fine...seen it in person after it was bought by someone up here (GenIII M90, for the record). My car shifts at 6500 RPM, on a 3.1" pulley...so figure out what the blower is spinning at that RPM...which is PROBABLY more stressful than a bone stock GTP that is daily driven. Mine should have failed by now I guess. My rotor pack gears should have been toasted. This is the same thing as tossing a smaller pulley on a car...can you do it? Sure. Is it safe? It could be. Doesn't mean its a bad idea. Doesn't mean it is the correct one either. Like I said to being with, when it fails, I'll let you know. And I'll eat my words.

And make note...I mistyped A number LOL...0W-20 is the correct weight, NOT 0W-30.. This is because no matter the temp of the oil...it never changes its viscosity. I'd also like to believe that there is SOMETHING else out there than just the pricey, hard to come by, GM S/C Oil. I'd love to sit down and break down the properties of GM's supercharger oil (which is probably mostly whale fat...lol) and the break down of Mobil 1's motor oil...to see how different GM's Supercharger oil really is. I do know it is Animal Fat based. Which, motor oil isn't, so I will give you that. I guess what I'm getting at...is that I'm just trying to help the cause...if you can get away with running something that lowers snout temps and still lubricates the internal gears just fine with a lower cost and a overall simpler product to find...then I'm all for it...and I think anyone would be, including you Zef.

I will however keep looking...and ask Scotty to post his findings on here when he compared the 2. That will help things here immensely IMO.
 
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I've heard KB suggests mobil 10w30 for their blowers for termis....

amsoil sig series 0W-20.

Kinematic Viscosity @ 100°C, cSt (ASTM D-445) 8.7
Kinematic Viscosity @ 40°C, cSt (ASTM D-445) 47.3
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sig series 10W-30

Kinematic Viscosity @ 100°C, cSt (ASTM D-445) 10.5
Kinematic Viscosity @ 40°C, cSt (ASTM D-445) 62.9
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Thats really different eh?
 
bluegtp91 said:
Touche; I don't know how long it'll last. People also might take yours saying GM oil is the only thing you can use. Do you know the properties? My example earlier was the same. GM DESIGNED Dexcool to be safe, but it obviously wasn't...so how is this any different? I'd personally think, if it was going to fail...it should have by now. Scotty had over 110K on his car when the transmission shelled. His blower was fine...seen it in person after it was bought by someone up here (GenIII M90, for the record). My car shifts at 6500 RPM, on a 3.1" pulley...so figure out what the blower is spinning at that RPM...which is PROBABLY more stressful than a bone stock GTP that is daily driven. Mine should have failed by now I guess. My rotor pack gears should have been toasted. This is the same thing as tossing a smaller pulley on a car...can you do it? Sure. Is it safe? It could be. Doesn't mean its a bad idea. Doesn't mean it is the correct one either. Like I said to being with, when it fails, I'll let you know. And I'll eat my words.

And make note...I mistyped A number LOL...0W-20 is the correct weight, NOT 0W-30.. This is because no matter the temp of the oil...it never changes its viscosity. I'd also like to believe that there is SOMETHING else out there than just the pricey, hard to come by, GM S/C Oil. I'd love to sit down and break down the properties of GM's supercharger oil (which is probably mostly whale fat...lol) and the break down of Mobil 1's motor oil...to see how different GM's Supercharger oil really is. I do know it is Animal Fat based. Which, motor oil isn't, so I will give you that. I guess what I'm getting at...is that I'm just trying to help the cause...if you can get away with running something that lowers snout temps and still lubricates the internal gears just fine with a lower cost and a overall simpler product to find...then I'm all for it...and I think anyone would be, including you Zef.

I will however keep looking...and ask Scotty to post his findings on here when he compared the 2. That will help things here immensely IMO.
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If it makes you feel any better, the manufacture of this oil for GM says it is synthetic:

http://productsearch.nyelubricants.com/pdf/tds_english_synthetic%20oil%20605.pdf

And here is the MSDS, someone asked for that:

http://productsearch.nyelubricants.com/pdf/msds_us_english_synthetic oil 605.pdf
 


so the determination is that according to viscosity/flow data that the AMSOIL 0-20 synth would be an acceptable substitute for short term or temporary use with regular changes and checks?
 
matt5112 said:
Looks like the amsoil sig series 0W-20 would be perfect....

Its thinner when cold, similar viscosity once warm, resists thinning more than the GM fluid.
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Weight of oil is not the only property important.

Two things to consider. One if the misting properties of the oil. As I mentioned before, the supercharger oil will mist and lubricate more effectively than the motor oil which is designed not to do this.

Second, the expansion of the supercharger oil is not to nothing. This is important because the supercharger snout is a closed system. The motor oil will expand much more as the temps increase can can cause problems with your seals. I didn't remember about this one until I looked at the Nye sheet.

Also, I see that the supercharger oil has copper passivators in it, whatever they are:

http://www.nyelubricants.com/lubenotes/Lubenote_SinteredBearings.pdf

http://www.nyelubricants.com/_pdf/automotive/Auto_Powertrain_Brochure.pdf
 
Zef_66 said:
Second, the expansion of the supercharger oil is not to nothing. This is important because the supercharger snout is a closed system. The motor oil will expand much more as the temps increase can can cause problems with your seals. I didn't remember about this one until I looked at the Nye sheet.
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Would be the only thing I would be concerned about, but I haven't noticed any leaks as of yet, Mobil 1 5w-30 in mine.

As far as whether its "right" for the M90 Gen III/V... figure that considering the fluid part number is the same fluid across the board for the M62, M90 GenIII, & M90 GenV... A replacement oil for 1 is a replacement oil for all 3. The part number nor fluid changes depending on which SC your using so why does it matter. If GM lists a change for one it counts for all. And like I told BillBoost, I have verified that it is STILL standing as a current replacement for dealerships.
As a parts guy we have to order a bulk case of 12 bottles in order to sell a customer 1 or 2 depending on their needs. We haven't needed to sell one in 3 years that Ive been here, kind of pointless to stock them if your not moving them. That's why the bulletin was posted.

Also this "misting" property your talking about that the SC oil does, if the rotor packs are spinning 10-12k then the gears are going so fast the oil will be picked up and thrown around the snout so much that it will lubricated everything without the need for "misting". The fluid also fills up to the middle of the gears so half of them are already submerged, positive lubrication there. :p
 
I have taken the nose off the supercharger to replace the coupler, but I haven't dismantled the nose on one these superchargers yet. At the end of the nose, isn't that a breather, not a bolt? So should it matter to the seals about expansion, maybe to the gears for clearance it still does, but I wouldn't think for the seals because of the breather.
 
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