You are on to something here Bob. I've seen the effect and it has been noted in other Insight forums over the last few years.scutterbob said:I've noticed that I get much better mpg right after I fill up. I've noticed as much as a 15 to 20 mpg increase over 2 week old fuel for a very similar set of driving conditions. Has anyone else noticed this?
Billy said:I have considered this for over 2 years. There is a psychological effect:
Well I think I can say you've got the "new" record for the most concise reply, ONE word. <VBG>Resist said:Bingo!
Ok, Thanks Bob!scutterbob said:<snip>
Btw, yeah Bob is fine. I'm not sure if there's much temperature difference between whats in my tank and whats in the stations tanks. I live in central FL, our ground water temp is between 69 and 72, and our air temps currently average around 65. But I have also now begun to wonder if its a deep mostly pure tank, vs the crud in the bottom kinda thing.
This is what I always assumed any fuel increase was. But I haven't really noticed it more than on one occassion.After a regular fill with fuel filling parts of your Insight’s Vapor recovery system, this excess fuel is sent back to be consumed and it will not be recorded by the FCD as fuel coming from the Fuel Pump. This is the main reason some might see 100 + mpg’s heading out of the gas station for a few miles or higher then normal FE after a fill.