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Old May 24, 2007 | 03:59 PM
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Default Oil – You get what you pay for!

Costs of synthetics vary considerably. The most expensive are the “Ester” types originally only used in jet engines. These cost 6 to 10 times more than high quality mineral oils.

The cheapest synthetics are not really synthetic at all, they are dug out of the ground and not manmade. These are in fact specially refined light viscosity mineral oils known as “hydrocracked” oils.

“Hydrocracked” oils have some advantages over their equivalent mineral oils, particularly in lower viscosity motor oils such as 5w-30 and 5w-40 and they cost about 1.5 times more than good quality mineral fractions. This is the “synthetic” which is always used in cheap oils that are labelled “synthetic”.

So, why are these special mineral oils called “synthetic”?

Well, it all came about from a legal battle that took place in the USA more than ten years ago. Sound reasons (including evidence from a Nobel Prize winning chemist) were disregarded and the final ruling was that certain mineral bases that had undergone extra chemical treatments could be called “synthetic”.

Needless to say, the marketing executives wet their knickers with pure delight! They realised that this meant, and still does, that the critical buzz-word “synthetic” could be printed on a can of cheap oil provided that the contents included some “hydrocracked” mineral oil, at a cost of quite literally a few pence.

So, the chemistry of “synthetics” is complex and so is the politics. The economics are very simple though.

If you like the look of a smart well-marketed can with “synthetic” printed on it, fair enough, it will not cost you a lot; and now you know why this is the case, it’s really only a highly processed mineral oil.

But, if you drive a high performance or modified car, and you intend to keep it for several years, and maybe do the odd “track day” or “1/4 mile”, then you need a genuine Ester/PAO (Poly Alpha Olefin) synthetic oil.

These oils cost more money to buy, because they cost a lot more money to make.

Very simply, you always get what you pay for, cheap oils contain cheap ingredients, what did you expect!
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Old May 24, 2007 | 04:53 PM
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how high up there is the silkolene pro s 10/50?
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Old May 24, 2007 | 05:34 PM
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It is an ester/pao blend so a group IV. So the best available really.

Cheers

Guy.
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Old May 24, 2007 | 06:11 PM
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How does the above Silkolene compare with Millers, Mr Oily ?
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Old May 24, 2007 | 06:14 PM
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And what's the difference in the production process between Halfords £5 for 1000 gallons oil and the Silkolene that you sold me ? Just curious !
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Old May 24, 2007 | 08:38 PM
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Originally Posted by oilman
It is an ester/pao blend so a group IV. So the best available really.

Cheers

Guy.
thats good, as i have been using it for years
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Old May 24, 2007 | 10:38 PM
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Originally Posted by andythejock01wrx
How does the above Silkolene compare with Millers, Mr Oily ?
The Millers CFS range is a 3 ester blend while the Silkolene is single ester, however the Millers is an "older" spec. API SJ rating as opposed to the Silkolene's SL. I would doubt the updated spec. makes any real difference in the use we make of the oil and the change periods we tend to use.
Both are good oils. If you're using Millers - no probs.
JohnD

Last edited by JohnD; May 24, 2007 at 10:40 PM.
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Old May 24, 2007 | 11:38 PM
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Originally Posted by JohnD
The Millers CFS range is a 3 ester blend while the Silkolene is single ester, however the Millers is an "older" spec. API SJ rating as opposed to the Silkolene's SL. I would doubt the updated spec. makes any real difference in the use we make of the oil and the change periods we tend to use.
Both are good oils. If you're using Millers - no probs.
JohnD
Cheers John.

I'm using Silkolene - so it's all good.
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Old May 25, 2007 | 10:08 AM
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surely with these superior oils then the oil change frequency should be a little longer if anything. But I am still hearing of peeps changing every 3000 miles
I assume they are doing loads of track days or have plenty of money. I use silklene pro s
ken
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Old May 25, 2007 | 10:14 AM
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Hi Oilman,

I have an early STi type RA, I've always used Millers brand oil and change every 3000 miles.
I've stuck with Millers because I've had not any "evident" problems and the prices are good.

The car is moderately modified.
What oil would you recommend running my scoob on.
Also if I were to stick with Millers, what would you recommend
Your recommendation would be highly appreciated.

Thanks in advance



Originally Posted by oilman
Costs of synthetics vary considerably. The most expensive are the “Ester” types originally only used in jet engines. These cost 6 to 10 times more than high quality mineral oils.

The cheapest synthetics are not really synthetic at all, they are dug out of the ground and not manmade. These are in fact specially refined light viscosity mineral oils known as “hydrocracked” oils.

“Hydrocracked” oils have some advantages over their equivalent mineral oils, particularly in lower viscosity motor oils such as 5w-30 and 5w-40 and they cost about 1.5 times more than good quality mineral fractions. This is the “synthetic” which is always used in cheap oils that are labelled “synthetic”.

So, why are these special mineral oils called “synthetic”?

Well, it all came about from a legal battle that took place in the USA more than ten years ago. Sound reasons (including evidence from a Nobel Prize winning chemist) were disregarded and the final ruling was that certain mineral bases that had undergone extra chemical treatments could be called “synthetic”.

Needless to say, the marketing executives wet their knickers with pure delight! They realised that this meant, and still does, that the critical buzz-word “synthetic” could be printed on a can of cheap oil provided that the contents included some “hydrocracked” mineral oil, at a cost of quite literally a few pence.

So, the chemistry of “synthetics” is complex and so is the politics. The economics are very simple though.

If you like the look of a smart well-marketed can with “synthetic” printed on it, fair enough, it will not cost you a lot; and now you know why this is the case, it’s really only a highly processed mineral oil.

But, if you drive a high performance or modified car, and you intend to keep it for several years, and maybe do the odd “track day” or “1/4 mile”, then you need a genuine Ester/PAO (Poly Alpha Olefin) synthetic oil.

These oils cost more money to buy, because they cost a lot more money to make.

Very simply, you always get what you pay for, cheap oils contain cheap ingredients, what did you expect!
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Old May 25, 2007 | 05:00 PM
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Oily's enjoying the bank holiday by the look of it !!
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Old May 25, 2007 | 06:51 PM
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Yeah.. out in barbados with all the comission he's made from us
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Old May 25, 2007 | 10:11 PM
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Originally Posted by Monkeh
Yeah.. out in barbados with all the comission he's made from us
Plus all the other forums he frequents (can't blame him, he's there to flog favoured brands of oil and is therefore, quite useful to have around?)
EG Mitsu Lancer Reg., Alfa Owners, RS etc. etc.

JohnD
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Old Jun 1, 2007 | 03:06 PM
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Originally Posted by andythejock01wrx
How does the above Silkolene compare with Millers, Mr Oily ?
Hi,

Fine, the millers claims to be tripple ester, the Silkolene is single ester so the quality should be there. The only thing that concerns me about the millers oil is the old out of date specs it meets, well according their website when I last looked.

Cheers

Guy.
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Old Jun 1, 2007 | 03:09 PM
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Originally Posted by andythejock01wrx
And what's the difference in the production process between Halfords £5 for 1000 gallons oil and the Silkolene that you sold me ? Just curious !
The £5 halfords one will be made to a cost, cheap additives, cheap base stock and cheap production process all to meet the minimum spec needed.

The Silkolene use higher quality additives, base stock etc and is built to be the best regardless of cost or spec.

Cheers

Guy.
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Old Jun 1, 2007 | 03:11 PM
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Originally Posted by scooby-k
surely with these superior oils then the oil change frequency should be a little longer if anything. But I am still hearing of peeps changing every 3000 miles
I assume they are doing loads of track days or have plenty of money. I use silklene pro s
ken
Ken,

For normal road use on a fairly standard car the Silkolene will go up to 10,000 miles with ease.

Cheers

Guy
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Old Jun 1, 2007 | 03:13 PM
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Originally Posted by Jap Import
Hi Oilman,

I have an early STi type RA, I've always used Millers brand oil and change every 3000 miles.
I've stuck with Millers because I've had not any "evident" problems and the prices are good.

The car is moderately modified.
What oil would you recommend running my scoob on.
Also if I were to stick with Millers, what would you recommend
Your recommendation would be highly appreciated.

Thanks in advance
If you want to stick with millers either a 10w-50 or 15w-50 if they do one, dont bother going to SAE60 as it is too thick.

Cheers

Guy.
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Old Jun 1, 2007 | 03:40 PM
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im using magnatec 10w 40,seems to be good

1995 WRX so not too much power so seems the easiest oiil to use.
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Old Jun 1, 2007 | 04:01 PM
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so where does Castrol Edge Sport sit in the grand scheme of things?
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Old Jun 1, 2007 | 04:05 PM
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The Castrol Edge Sport is pretty good stuff, they have put a lot ofr effort into making the Edge range much better then the old RS range.

Cheers

Guy.
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Old Jun 1, 2007 | 04:07 PM
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How different are the specs between edge and rs, Guy?
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Old Jun 1, 2007 | 05:07 PM
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Specs wise not a lot, they are just up to date and meet a lot of high spec VAG and BMW specs. What they have done at the moment any way is make the oil to the quality they say it is.

With the old RS especially the 10w-60 they reduced the quality of it so people werent buying what they thought they were buying.

Cheers

Guy.
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Old Jun 1, 2007 | 05:47 PM
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What about Shell Helix Ultra 5W-40 fully synthetic? Is that ester based?
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Old Jun 1, 2007 | 05:56 PM
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Originally Posted by oilman
The £5 halfords one will be made to a cost, cheap additives, cheap base stock and cheap production process all to meet the minimum spec needed.

The Silkolene use higher quality additives, base stock etc and is built to be the best regardless of cost or spec.

Cheers

Guy.
Cool, just put the Silkolene Pro S 5w40 you sold me into my Scoob yesterday.
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Old Jun 1, 2007 | 07:51 PM
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Originally Posted by oilman
The Silkolene use higher quality additives, base stock etc and is built to be the best regardless of cost or spec.

Cheers

Guy.

strange then that both Motul (double ester base) and Millers (triple ester base) would appear to be ahead of the game.....................

and you will find no issue at all with 10w60 on a modded car 'thickness' not withstanding...............

alyn
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Old Jun 1, 2007 | 07:56 PM
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Originally Posted by oilman
The Castrol Edge Sport is pretty good stuff, they have put a lot ofr effort into making the Edge range much better then the old RS range.

Cheers

Guy.
goody gumdrops
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Old Jun 2, 2007 | 02:53 PM
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Originally Posted by stockcar
and you will find no issue at all with 10w60 on a modded car 'thickness' not withstanding...............
alyn
I think you are taking unecessary risks if oil temps are below 120degC

Cheers
Simon
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Old Jun 2, 2007 | 02:57 PM
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What do racing cars use - not F1, but the various cars raced domestically - say Touring Cars ?
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Old Jun 2, 2007 | 03:28 PM
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where is the miller oil made? sorry my ignorance as i am based in asia and have not heard of these oil before
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Old Jun 2, 2007 | 04:21 PM
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Originally Posted by andythejock01wrx
What do racing cars use - not F1, but the various cars raced domestically - say Touring Cars ?
I get my car serviced my an ex wroks prodrive mechanic who runs a number of WRC and group n cars. They all get castrol edge sport.
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