Bright stock used in oil formulations

[Motorbike]

For example the Equillon made Havoline 5w-40 Synthetic apparently used brightstock as a thickener in conjunction with a 4cSt PAO so I was thinking given how in the USA vs Europe a synthetic oil does not have to be PAO or Ester basestocks entirely to market as such when we see some of these synthetics thickening out of grade could it be that they are using at least some bright stock and it's that is oxidising in the formulated oil since bright stock is not available in synthesised form ?

I mean Mobil SS 30wts does not thicken out of grade that I've seen here yet others do at around the same miles on the longer intervals .

I should have made it clear I was speaking of synthetics in the first post .

[ February 15, 2004, 02:46 PM: Message edited by: Motorbike ]

 

[G-MAN]

quote:

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Originally posted by Motorbike:
For example the Equillon made Havoline 5w-40 Synthetic apparently used brightstock as a thickener in conjunction with a 4cSt PAO so I was thinking given how in the USA vs Europe a synthetic oil does not have to be PAO or Ester basestocks entirely to market as such when we see some of these synthetics thickening out of grade could it be that they are using at least some bright stock and it's that is oxidising in the formulated oil since bright stock is not available in synthesised form ?

I mean Mobil SS 30wts does not thicken out of grade that I've seen here yet others do at around the same miles on the longer intervals .

I should have made it clear I was speaking of synthetics in the first post .

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What makes you think the Havoline 5w40 had Brightstock in it?

 

[Motorbike]

The MSDS while it was available

These threads sure do get long when members quote an entire post

[ February 15, 2004, 05:05 PM: Message edited by: Motorbike ]

 

[Motorbike]

Anyone interested take a look at this thread i just found .

I think it's very possible others use bright stock in synthetics available in the USA with wider spreads for cost reasons.. who knows , maybe in 30wts .

5w-40 MSDS Thread

 

[G-MAN]

quote:

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Originally posted by Motorbike:
Anyone interested take a look at this thread i just found .

I think it's very possible others use bright stock in synthetics available in the USA with wider spreads for cost reasons.. who knows , maybe in 30wts .

5w-40 MSDS Thread

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There is no Brightstock listed in that MSDS. Molakule's comments notwithstanding, I don't think that is the CAS # for Brightstock. (And Brightstock would be Group I anyway.)

 

[Motorbike]

What does the forum think in general of bright stock being used in some of these formulated oils we use today ?

Does bright stock used as a thickener have the tendency to oxidise more so than a formulation that does not use it ?

If bright stock does have the tendancy to oxidise and thicken would it not be better to blend in a higher vi base stock " most company's do " and is the use of bright stock primarily for lowering the cost of a formulated oil ?

[ February 15, 2004, 12:11 PM: Message edited by: Motorbike ]

 

[G-MAN]

Which oils are you claiming have bright stock in the base oil blend? "Bright stock" is a Group I that is rarely used in ANY modern motor oil formulation. In fact, it would be impossible to build a GF-3 oil with bright stock in the base oil blend.

 

[Shannow]

One of the popular brandnames (Penrite) down under state that they use Brightstock in a lot of their formulations.

They also make a big advertising point that they don't use Friction Modifiers, and that xW-60 is about the minimum vicosity that you should run in anything.