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Old 12 Nov 2004, 02:40 PM   #1 (permalink)
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Oil Recommendations here!

My name is Simon Barnard and I run an oil distribution business in the South West.

We deal with many car clubs and have access to a lot of data on oils and their correct applications with regards to all cars.

I posted this on Scoobynet recently and a Member here asked me to visit and post here.

I am able to give advice on oil and proper technical recommendations. If I can be of assistance please feel free to ask.

"Well, I've done a lot of homework in the last week and I've got recommendations from three separate companies who are all experts.
The last oil thread I started caused much debate and I guess that this one will go the same way - Still, that's what Forums are for!

1. Silkolene Technical Department
2. Motul Technical Department
3. OATS - The largest proprietory oil recommendation database in the UK.

And, these were the recommendations that I recieved from them:

Firstly, lets get straight the viscosities available to you (as most work on matching a viscosity to an ambient temperature similar to the way handbooks list them) and the temps they are designed to operate at.

-20°C and above, 10W-40 or 10w-50
-15°C and above, 15W-40 or 15w-50
-25°C and above, 5w-30 or 5w-40

Impreza 2.0i Sport 1996-00

Motul 5w-40 or 10w-40
Silkolene 5w-40 or 10w-40
OATS 10w-40

Impreza 2.5i 4WD 2001 onwards

Motul 5w-30 or 5w-40
Silkolene 5w-40
OATS 5w-30 or 5w-40

Impreza 2.0i WRX/STi Turbo 2001 onwards

Motul 5w-30 or 5w-40
Silkolene 5w-40
OATS 5w-30 or 5w-40

Impreza 2.0i Turbo 1994-00

Motul 5w-40 or 10w-40
Silkolene 5w-40
OATS 10w-40

Impreza 2.0 4WD 2000 onwards

Motul 0w-30, 0w-40, 5w-30 or 5w-40
Silkolene 5w-30 or 5w-40
OATS 5w-30 or 5w-40

Impreza 1.6i, 1.8i 4WD 1993-96

Motul 5w-40 or 10w-40
Silkolene 10w-40
OATS 10w-40

They all specify that "fully synthetic" is recommended.

What's interesting about this is that they all tend to agree on grades pretty much and that unless the there is a non stock requirement like track days or modifications increasing BHP that 5w or 10w is favorites and that SAE 30 or 40 is the preferred range. 15w may be to heavy and sae 50 can be used if you are running high temperatures.

I further asked Motul concerning the oils used by the Subaru World Rally Team and they listed the following as being used in the cars.

Engine: Motul 300V 5w-40 Fully Synthetic
Gearbox: Motul 300 75w-90 Fully Synthetic
Brakes: Motul RBF 600 Brake Fluid

For technical data (downloadable) on oils by Silkolene, Motul, Fuchs, Total, Mobil and Castrol please see here: http://www.opieoils.co.uk/lubricants.htm

Cheers
Simon
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Old 12 Nov 2004, 02:58 PM   #2 (permalink)
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Many thanks for submitting this information Oilman. Welcome to the site too - this information will ber of great use to us

Hope you enjoy your vists here too
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Old 12 Nov 2004, 03:08 PM   #3 (permalink)
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Many thanks for that simon


And welcome to the forum as well m8
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Old 12 Nov 2004, 03:16 PM   #4 (permalink)
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Hi Simon

Thanks for the info. and welcome aboard
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Old 12 Nov 2004, 03:17 PM   #5 (permalink)
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welcome mate :wink:
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Old 12 Nov 2004, 03:40 PM   #6 (permalink)
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welcome to the site mate...enjoy
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Old 12 Nov 2004, 05:40 PM   #7 (permalink)
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Hi & Welcome Simon.

Thanks for the technical data (downloadable) on oils 8)


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Old 12 Nov 2004, 06:18 PM   #8 (permalink)
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Thanks for posting this up and welcome aboard
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Old 12 Nov 2004, 07:41 PM   #9 (permalink)
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Interesting stuff thank you and welcome :wink:


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Old 12 Nov 2004, 11:57 PM   #10 (permalink)
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Welcome Simon.

Very interesting stuff.

Thanks
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Old 14 Nov 2004, 04:56 PM   #11 (permalink)
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Thanks for all the welcomes - this is a friendly place compared to some others, no names mentioned :wink:

Thought I'd share this with you and apologies if you read it somewhere that I posted it before. It's a great article as it's written by a Chemist and not a Salesman :shock:

A word of caution – You get what you pay for!

Below is an article written by John Rowland, Silkolene/Fuchs Chief R & D Chemist for 40 years.

Quote:

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, from a chemists point of view. These are in fact specially refined light viscosity mineral oils known as “hydrocracked”. These have some advantages over equivalent mineral oils, particularly in lower viscosity motor oils such as 5w-30 or other oils with a low “W” rating such as 5w-50 etc and they cost about 1.5 times more than good quality mineral fractions.

We use several different grades of this base oil, where appropriate. This is the “synthetic” which is always used in cheap oils that are labelled “synthetic”. Yes it’s a cruel world, you get what you pay for!

Now, you may ask, why are these special mineral oils called “synthetic”?

Well, it was all sorted in a legal battle that took place in the USA about 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 a few percent of “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. 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. But, if you drive a high performance car, and you intend to keep it for several years, and maybe do the odd “track day”, then you need a genuine Ester/PAO (Poly Alpha Olefin) synthetic oil.

This oil costs more money to buy, because it costs us a lot of money to make, very simply, you always get what you pay for!

Unquote:

If you have any questions on oils at all, please feel free to ask as I'm happy to help.

Cheers
Simon
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Old 14 Nov 2004, 05:16 PM   #12 (permalink)
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Hello and welcome to the site, sorry I'm a bit slow here, but I am a Doris....

Technical info.... Mmmmmm, no, not my departement.....
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Old 14 Nov 2004, 05:40 PM   #13 (permalink)
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Simon, very friendly bunch over here

That information is great reading - it that branding thing again :shock:

Many thanks for pointint it out
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Old 14 Nov 2004, 07:40 PM   #14 (permalink)
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Branding can contribute to the confusion but it's the incorrect (although legal) use of the word "synthetic" that's the main problem.

It would also help if oil companies were more open about the basestocks used and in what percentage but alas they treat it as some kind of trade secret.

I'm only able to obtain info on the products that I sell and that's because I always push for it but I'm not allowed to publically divulge the actual percentages, merely indications.

Yes it's confusing but I object to so many people paying for "synthetics" and sadly in 90% or more of cases they're getting petroleum oils - It's not right!

Cheers
Simon
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Old 14 Nov 2004, 08:58 PM   #15 (permalink)
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That made very interesting reading
Can you then point us at TRUE synthetic oils that we should go for
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