oilman
Member
Registered: 13th Jul 04
Location: South West
User status: Offline
|
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!
|
12vMatt
Member
Registered: 28th Oct 06
Location: Sunderland
User status: Offline
|
good read and useful info 
|
DAZ1985
Member
Registered: 3rd Sep 06
Location: Scholar Green, Cheshire
User status: Offline
|
oilman recommend me some oil please
calibra turbo engine, corsa 144k rebuilt 44k ago, driven hard (ocassionally when its finished anyway)
|
jamesvalver
Member
Registered: 21st Feb 03
Location: Bury St Edmunds, Suffolk
User status: Offline
|
very good read. ive been told i should run mobil1 (0w40) inc my xe when its run in
|
Warren G
Member
Registered: 14th May 06
Location: Kent
User status: Offline
|
well i don't pay for my oil  ......but its 0w30 GM fully syn
|
oilman
Member
Registered: 13th Jul 04
Location: South West
User status: Offline
|
quote:
Originally posted by DAZ1985
oilman recommend me some oil please
calibra turbo engine, corsa 144k rebuilt 44k ago, driven hard (ocassionally when its finished anyway)
5w-40 synthetic for yours
Cheers
Simon
|
