Fuel and related compositions – Liquid fuels
Reexamination Certificate
2004-06-17
2009-10-06
Toomer, Cephia D (Department: 1797)
Fuel and related compositions
Liquid fuels
C044S451000, C585S014000
Reexamination Certificate
active
07597724
ABSTRACT:
A gasoline composition is provided containing a hydrocarbon base fuel containing 5 to 20% v olefins, not greater than 5% v olefins of at least 10 carbon atoms, not greater than 5% v aromatics of at least 10 carbon atoms, initial boiling point in the range 24 to 45° C., T10in the range 38 to 60° C., T50in the range 77 to 110° C., T90in the range 130 to 190° C. and final boiling point not greater than 220° C. A method of operating an automobile using such gasoline composition as fuel is provided. Use of such gasoline composition as fuel provides improved stability of engine lubricant with reduced frequency of engine oil changes.
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Shell Oil Company
Toomer Cephia D
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