home made sc oil

Guys don't forget he's got a '95 and M62, and the oil spec is different than the M90.

Special Oils are designed for special applications all the time. Different weights are called for based on different clearances and tolerances, how much metal is expected to expand when it gets hot, etc etc. What kind of 1000 hp s/c is your friend running? Not an M62 or M90, right? It calls for a different oil too.

Some manual transmissions use ATF for their gear oil. It all depends how the thing was designed.

Quote :

i bought the gm stuff,added it,smelled it,and it made the s/c noisy

Are you serious? I can't see how this is possible unless your blower has a problem. Mine didn't get any louder using GM oil.

About the only reason I can think of to use an alternative SC oil would be in the case that your blower was low on oil and you couldn't get the recommended GM product soon enough.

Being that these blowers are practically indestructible anyways, we really can't say which type of fluid works best just by pouring something in and saying "it works". Maybe it lubricates, but how do we know it works best? By the sound? By the smell? By our opinion? Has anyone thought about the possibility that the function of this oil could be beyond lubrication, and maybe it has coolant properties as well?

The only sure way would be to bench test the blower and spit out some numbers that show which oil performed the best over millions of revolutions - and I'm sure Eaton, Magnuson, and GM have all tried this, and they all suggest the oil in that little blue bottle. Even the 3800 V6 performance vendors, who would surely sell their own oil blend with mark up, they still recommend the GM stuff. I'm not a chemist, but that whale fat is in there for a reason - or it wouldn't be there. The recommended change interval is what, 80k miles? Good lord, what more can we ask for?

robotennis61 wrote:

that might be true rw. the stock oil was thin to say the least. this stuff holds its viscosity pretty well. wish i could remember the place in cali that i bought my s/c pully from? but these guys have been in business for years and when i mentioned gm s/c oil they dont use it. sed they only use theire stuff. for rebuilds and anything else that comes in theire shop. i trust the guy. and so far so good..........

I can understand a shop, that goes thru a LOT of SC fluid doing rebuilds, doing this to save a fair amount of cash simply due to the volume they go thru. I'm sure it adds up.

i have to admit i filled up my m90 with 5w30 full syn a week or so ago because i was out of gm stuff and really low on oil.(have a leak)
i plan on repairing the leak in a few weeks when i get the new P&P blower, but until then i'm going to keep filling it with the cheaper 5w30. i will inspect the internals when i have it all apart and report back, but i dont expect to see anything showing the wrong oil was used, especially in only a months time and <500 miles.

Mr.Riviera wrote:

i have to admit i filled up my m90 with 5w30 full syn a week or so ago because i was out of gm stuff and really low on oil.(have a leak)
i plan on repairing the leak in a few weeks when i get the new P&P blower, but until then i'm going to keep filling it with the cheaper 5w30. i will inspect the internals when i have it all apart and report back, but i dont expect to see anything showing the wrong oil was used, especially in only a months time and <500 miles.

I'm sure over a couple of weeks you probably won't notice anything. More important to keep it full, but in the long run you want the right kind of oil.

AA wrote:

I'm not a chemist, but that whale fat is in there for a reason - or it wouldn't be there. The recommended change interval is what, 80k miles? Good lord, what more can we ask for?

You know, it's funny how sometimes we always dismiss the factory, like when it comes to 7500-mile LOF's, and other times we absolutely assume their rectitude and veracity... Most of us here are probably not really worrying about finding cheaper blower oil, but rather are wondering if there isn't something better to put in there. As animals, that rotten-cheddar smell automatically raises a red flag, and as modders, we want to make things as bullet-proof as possible.

Aaron's post made me double-check the manuals, and I was surprised to find that both the owner's and shop manuals only specify checking/topping the supercharger oil at 30,000 miles, with no recommendation on changing it.

Now, I've learned some non-recommended things over the years that I swear by, like Type F fluid in RWD THM's instead of Dexron. However, with a snout that is still silent and has no coupler-slop, I'm going to stick with the GM/Eaton blower oil... but I'm gonna' change it at 30k, not just top it off!

When the odor gets bad, my gut tells me that whale oil has given its all and need to be replaced.

...and keeping in mind that GM has released information to all its dealers saying to use syn 5w-30 as SC fluid in the m62.

so the m62 can run on syn, but the M90 runs on animals.

I dont want a whale inside my s/c anyway...

I like whales.

i know! the poor things! imagine if we were used as oil to fry chips and such? its 'orible!

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read it and weep baby! still a rabbit!

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