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I do not have as much data to date studing my daily commute relative to tank level - but i would find it hard to believe that the vapors are escaping to anywhere in a sealed tank - Is there some vapor loss when you insert the nozzle to refill? is that quantity measureable?
I don't know.
As for your item #2 - Maybe it is just me - but if i see the tanker truck at the station unloading more fuel - I skip the fueling and get it later. There may be no truth to it - but that is what i do.
Item #4 - I have found that filling it on SLOW seems to work better for my car - maybe it is how the pipe is bent - but on HIGH flow it will click itsself off Way Early.
#1 has been discussed before and I don't think it impacts my tanks too much - Although the majority of my fills are about the same time of day ( on way home from work) so if there was a differance - my tank to tank variation would be small in my data.
Steve
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Steve - AKA Doofus McFancypants
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"If there's a new way, I'll be the first in line - But it better work this time"
 First Milestone passed - 30 MPG (city) 5/15/08
Best City Tank - 8/31/09- 34.3 MPG (EPA= 20)
Best Highway Tank - 5/20/09 - 36.5 MPG (EPA= 28)
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In effort to drive less:
Miles NOT driven in 2009 = 648 (Work from home and Alt Transporatation)
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