The EPA banned the use of leaded gas (for road vehicles at least) starting in January 1996. Your dealer appears to be misinformed. Read up on the Clean Air Act.Fudd wrote:Dealer service manager says I need to go to 91 octane for improved mileage. Says gasoline I'm using is leaded, contrary to what the sticker on the pump indicates.
There MAY be some instances where higher octane gas will provide a slight fuel savings, particularly under high load and temperature. But it's not going to offset the increased cost of the fuel itself.
Many of the posts in the fuel mileage thread make it very obvious that driving habits and the type of driving patterns have a huge impact on fuel economy and not the octane of the fuel. Short trip city driving in heavy traffic is probably the worst while rural driving (40-50mph) nets the best fuel economy. But this is true not only for Nissan vehicles, but any other makes as well.
I am always open to experimentation. Go ahead and try for yourself. It might surprise you... the only thing you have to loose is the few $$$ you spent on premium. My money is saying it'll make no difference in fuel economy.
And BTW, I've been running 87 octane since the first day I brought my Rogue home.