Oxygenated gasoline composition having good driveability performance

1. A method for producing a gasoline blend having good cold start and warm-up driveability performance comprising

blending at least one butanol isomer, one or more hydrocarbon blend stocks, and optionally one or more additives, to form a gasoline blend;

determining the volatility of a volume fraction of the gasoline blend at temperatures up to about 200° F. (E200) by a distillation test; and

adjusting the volume percent of the at least one butanol isomer, the concentrations of the one or more hydrocarbon blend stocks, or a combination thereof to provide a gasoline blend having an E200 of at least 35 volume percent.

2. The method of claim 1 , wherein the concentration of the at least one butanol isomer is at least 40 volume percent of the of the gasoline blend.

3. The method of claim 1 , wherein the at least one butanol isomer comprises isobutanol.

4. The method of claim 1 , wherein the volume fraction of the gasoline blend that evaporates at temperatures up to about 200° F. (E200) is at least 40 volume percent of the gasoline blend.

5. The method of claim 1 , wherein the volume fraction of the gasoline blend that evaporates at temperatures up to about 200° F. (E200) is at least 45 volume percent of the gasoline blend.

6. The method of claim 1 , wherein the volume fraction of the gasoline blend that evaporates at temperatures up to about 200° F. (E200) is at least 50 volume percent of the gasoline blend.

7. The method of claim 1 , wherein the concentration of the at least one butanol isomer is at least 30 volume percent of the of the gasoline blend.

8. The method of claim 1 , wherein the one or more additives is selected from detergents, antioxidants, stability enhancers, demulsifiers, corrosion inhibitors, and metal deactivators.