Surface Water. COCKREHAM ISLAND BUY-OUT FEASIBILITY STUDY. The Cockreham Island Flood Hazard Reduction Buy-Out Study: Cockreham Island is located between the Towns of Lyman and Hamilton, in Skagit County, Washington, and is adjacent to the Skagit River.
And we certainly see a decrease in NOx without a significant increase in HC or CO. So, in some instances, buying a slightly higher octane fuel can both increase performance and help pass a failed emissions test. Generally, yes, spending money on higher octane than your owner's manual recommends is a waste of money. But sometimes ethanol tilts the scales. Of the 6 vehicles I've owned, 2 benefited from slightly higher octane-the other 4 suffered.
Which gasoline is best for your vehicle? Most of us believe that the higher the octane number (that yellow sticker on the gas pumps), the better performance and fuel economy we will receive in exchange for the higher price.So what's the truth? Here's the low-down on high octane gas.hich gasoline is best for your vehicle? Most of us believe that the higher the octane number (that yellow sticker on the gas pumps), the better performance and fuel economy we will receive in exchange for the higher price. So what's the truth?