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.
Three. In the 2001 to 2009 Prius, no better gas mileage was measured for any gas other than the 87 octane (from a reputable station) recommended by Toyota. There is some evidence that high octane produced more power in hill climbs.ong term, use high quality 87 octane gas from busy stations. And the only fuels to stay away from are not gas, do not use diesel or E85 in a Prius. Hy-Bird said: â. I always thought the higher the gas the better it burn in the tank.