Basestocks from the Group I or Group II classification used by the American Petroleum Institute (API) can readily meet these requirements with suitable detergent inhibitor (DI) and viscosity index improver (VII) systems. VIA) which is tiered according to viscosity grade: 1.4% minimum for SAE 5W-20, 1.1% minimum for SAE 5W-30 and 0.5% minimum for SAE 10W-30. GF-2 also requires a minimum level of fuel economy versus a reference oil (BC-2) in a standard engine test (Seq. Under current GF-2 American Petroleum Institute (API) classification standards for PCMOs, SAE 5W-20, 5W-30 or 10W-30 oils must have volatilities as measured by gas chromatography distillation (GCD) of no more than 17%, or Noack volatilities of no more than 22%. C10M171/02- Specified values of viscosity or viscosity index.containing ingredients which are physically well-defined but for which the chemical nature is either unspecified or only very vaguely indicated containing as base-material, thickener or additive, ingredients which are characterised exclusively by their numerically specified physical properties, i.e. C10M171/00- Lubricating compositions characterised by purely physical criteria, e.g.
C10M101/00- Lubricating compositions characterised by the base-material being a mineral or fatty oil.C10M177/00- Special methods of preparation of lubricating compositions Chemical modification by after-treatment of components or of the whole of a lubricating composition, not covered by other classes.C10M- LUBRICATING COMPOSITIONS USE OF CHEMICAL SUBSTANCES EITHER ALONE OR AS LUBRICATING INGREDIENTS IN A LUBRICATING COMPOSITION.C10- PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MONOXIDE FUELS LUBRICANTS PEAT.Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) Filing date Publication date Priority claimed from US60/164,407 external-priority Application filed by Exxonmobil Research And Engineering Company filed Critical Exxonmobil Research And Engineering Company Priority to JP2001537432A priority Critical patent/JP2003514099A/en Priority to AU14623/01A priority patent/AU1462301A/en Priority to KR1020027005940A priority patent/KR20020051932A/en Priority to CA002390229A priority patent/CA2390229A1/en Priority to EP00976916A priority patent/EP1238045A1/en Publication of WO2001034735A1 publication Critical patent/WO2001034735A1/en Links Deane Original Assignee Exxonmobil Research And Engineering Company Priority date (The priority date is an assumption and is not a legal conclusion. Inventor Hans Kennard Crosthwait Christopher John May Barry C. Google Patents WO2001034735A1 - Method for optimizing fuel economy of lubricant basestocks WO2001034735A1 - Method for optimizing fuel economy of lubricant basestocks
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