Antonija  +  243923 Sun, 09 Jul 06 09:04 AM Can you, please, check it?  Should I replave ''characteristics'' with ''properties'' in the context? Is ''oil field'' ok?    Chemical composition and physical characteristics/properties of oil vary according to certain oil fields. The value of oil depends primarily on the content of light fractions (petrol, petroleum and gas oil) and on the amount of sulphur. The more light fractions there are and the less sulfur there is, the oil is more valuable. Antonija Joined on Sun, Mar 5 2006 Croatia Contributing Member 1,316

	Mister Micawber  +  243954 Sun, 09 Jul 06 01:57 PM The chemical composition and physical properties of oil vary according to the oil field. The value of oil depends primarily on the content of light fractions (petrol, petroleum and gas oil) and on the amount of sulphur. The more light fractions there are and the less sulfur there is, the more valuable the oil is. Both are fine, but properties is a more 'chemical' word, and that's what I would choose.  Certain is odd, and I have deleted it and adjusted the phrase.  I have also fixed the parallelism of the the more...the more clause. Mister Micawber Joined on Wed, Aug 4 2004 Yokohama Veteran Member 30,805 'The question is,' said Humpty Dumpty, 'which is to be master-- that's all.' Clauses

	Alan.es  +  243955 Sun, 09 Jul 06 01:58 PM The chemical composition and physical characteristics of oil vary according to the oil field of origin. The value of oil depends primarily on the content of light fractions (petrol, petroleum and gas oil) and on the amount of sulphur. The more light fractions there are and the less sulfur there is, the more valuable the oil. Sorry, Mr Micawber and I posted more or less at the same time but It looks like we've said almost exactly the same. Just the one about properties/characteristics is different. I originally put properties but then changed it to characteristics since the variation from one oil-field to another are not just its colour, viscosity etc but also the amount of water, sludge, degree of emulsification and others which don't fit into the idea of physical properties. It's a fine line and I wouldn't argue too strongly in favour of one or the other - both are reasonably suitable to me. Alan.es Joined on Sun, Apr 16 2006 Full Member 303

	Squeaky  +  244059 Mon, 10 Jul 06 01:32 AM I think i can improve on your middle sentence.   See what you think... The value of oil primarily depends on the recoverable content of the lighter fractions ( those used for petrol, petroleum and gas oils) and on the sulphur content. The more lighter fractions present and less sulphur content, makes the oil more valuable. Squeaky Joined on Sun, Nov 13 2005 Australia Full Member 202