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#1877242 - 05/01/10 12:39 PM What happened to Arco graphite motor oil?
itsalex Offline


Registered: 10/20/07
Posts: 38
Loc: LA CA
and why? didn't work? or didn't sell? I know it was black....
Thanks Alex

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#1877296 - 05/01/10 02:04 PM Re: What happened to Arco graphite motor oil? [Re: itsalex]
ARCOgraphite Offline


Registered: 05/17/09
Posts: 10025
Loc: N.H, U.S.A.
Gee, I dont know, I just bough some ... 30 years ago wink I think there were agglomeration problems as the oil aged, even though the microfine graphite was freely passed through filters when fresh.
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#1877311 - 05/01/10 02:27 PM Re: What happened to Arco graphite motor oil? [Re: ARCOgraphite]
beast3300 Offline


Registered: 12/24/09
Posts: 3130
Loc: Ohio
Can somebody explain the joke here? I don't get it.
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#1877319 - 05/01/10 02:35 PM Re: What happened to Arco graphite motor oil? [Re: beast3300]
IntegraVT Offline


Registered: 09/03/07
Posts: 337
Loc: Northern NJ
You can still find cans of the stuff at garage sales and on eBay... <=- (This auction even includes a spout!)
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#1877324 - 05/01/10 02:37 PM Re: What happened to Arco graphite motor oil? [Re: IntegraVT]
beast3300 Offline


Registered: 12/24/09
Posts: 3130
Loc: Ohio
Originally Posted By: IntegraVT
You can still find cans of the stuff at garage sales and on eBay... <=- (This auction even includes a spout!)


Oh! It is actually motor oil.......lmao
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#1877326 - 05/01/10 02:46 PM Re: What happened to Arco graphite motor oil? [Re: beast3300]
mechtech2 Offline


Registered: 09/05/06
Posts: 19479
Loc: Chicago Area
It was not visually appealing.
It was expensive to make.
Various form of moly can work well, but graphite caused problems.

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#1877340 - 05/01/10 03:04 PM Re: What happened to Arco graphite motor oil? [Re: mechtech2]
Panzerman Offline


Registered: 12/16/06
Posts: 3246
Loc: Port Orange, Florida
I remmember cases of this stuff at a gas station(a Arco station) and I was going to buy some and the owner of the station told me not to put it in my car, it finds every leak. I remmember seeing it, it was dark gray and looked terrible, I would say the visually not appealing look is why it wasnt all that popular. The only bad thing, I heard about it was that it caused leaks.
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#1877355 - 05/01/10 03:17 PM Re: What happened to Arco graphite motor oil? [Re: Panzerman]
Old Mustang Guy Offline


Registered: 11/16/05
Posts: 815
Loc: Rockwall, Texas
At the time it was on the market, there were plenty of other horror stories about it, worse than leaks. Some people claimed it made the valves stick and clatter. I bought my first car in 1970. I think it was on the market at about that time.

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#1877364 - 05/01/10 03:21 PM Re: What happened to Arco graphite motor oil? [Re: IntegraVT]
zloveraz Offline


Registered: 04/07/10
Posts: 860
Loc: Frisco, TX
Originally Posted By: IntegraVT
You can still find cans of the stuff at garage sales and on eBay... <=- (This auction even includes a spout!)


Wonder what a VOA would look like?
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#1877393 - 05/01/10 04:03 PM Re: What happened to Arco graphite motor oil? [Re: zloveraz]
RISUPERCREWMAN Offline


Registered: 07/29/08
Posts: 1026
Loc: RHODE ISLAND
Gee lets see shall we? Graphite is a sand & when is it ever good to put sand into a internal combustion engine!!! (LOL)....
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#1877586 - 05/01/10 07:07 PM Re: What happened to Arco graphite motor oil? [Re: RISUPERCREWMAN]
SaturnIonVue Offline


Registered: 10/15/05
Posts: 626
Loc: New Orleans, LA
Boutique oil. Antique oil. That ARCO oil must have had a tremendous shelf life. :)
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#1877594 - 05/01/10 07:14 PM Re: What happened to Arco graphite motor oil? [Re: SaturnIonVue]
PurplePride Offline


Registered: 01/16/10
Posts: 527
Loc: Cali
The crystalline structure of graphite is bad for motor oil. It's like a plate. The plate "top and bottom" sides are good, smooth surfaces. The bad part is the edges which are relatively sharp or coarse. Not good, which is likely one of the reasons it was dropped.
Molybdenum is similar, but doesn't have that problem, making it better for engines.
I'm sure the black color freaked some out. I used it in my 69 Z/28 until my father told me why I shouldn't. He's a world renowned geophysicist, so I took him at his word. He specialized in high-pressre, high-temperature geochemical research. I still thought it was cool though. But a bugger to get off of your hands and concrete.

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#1877608 - 05/01/10 07:24 PM Re: What happened to Arco graphite motor oil? [Re: itsalex]
Wilhelm_D Offline


Registered: 01/28/09
Posts: 818
Loc: Tacoma, WA
Originally Posted By: itsalex
and why? didn't work? or didn't sell? I know it was black....


There appeared to few benefits.

The graphite was in suspension, not solution, and tended to agglomerate over time.

Graphite, which is an allotrope of carbon like diamond, was thought to be an effective lubricant due to the loose interlamellar coupling between sheets in the structure. It turned out that in a vacuum environment (such as in technologies for use in space) graphite is a very poor lubricant.

This led to the discovery that graphite's lubricity is due to adsorbed air and water between the layers, unlike other layered dry lubricants such as molybdenum disulfide. In short, it didn't do much.

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#1877625 - 05/01/10 07:33 PM Re: What happened to Arco graphite motor oil? [Re: IntegraVT]
xxch4osxx Offline


Registered: 03/11/09
Posts: 2127
Loc: Cedarbrae, Ontario
Originally Posted By: IntegraVT
You can still find cans of the stuff at garage sales and on eBay... <=- (This auction even includes a spout!)
I have one of those spouts, it is in like-new condition too! Got it given to me by a guy who was going to throw it out.
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#1878052 - 05/02/10 08:23 AM Re: What happened to Arco graphite motor oil? [Re: itsalex]
NHHEMI Offline


Registered: 07/06/07
Posts: 6190
Loc: NH
Originally Posted By: itsalex
and why? didn't work? or didn't sell? I know it was black....
Thanks Alex


This stuff was horrendous. Turned to a tar like goo in the engine and left a cottage cheese consistancy sludge like build up in the pan and on parts. I tore apart a 318 that had run exclusively on that crud( 3k OC's religiously )and it was a nighhtmare. It took me forever to clean the parts up.


Edited by NHHEMI (05/02/10 08:24 AM)
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