[Miata] Regular vs Premium after 2001

[Robert McElwee]

Any ECU that takes 300 miles to adjust to a different grade fuel is surely
defective. I would think that 0.5 seconds of knock would be more than
sufficient to change parameters.

In any event, John Freas, if you set the cruise control on 65 MPH on a flat
section of interstate and see what fuel consumption is (shouldn't take more
than a mile or two to see) and then do the same a tank later (assuming a
"flushed" tank) with a different grade of fuel you should be able to come up
with some interesting numbers. This wouldn't account for city driving but I
don't see any way to ever be able to test for that. Just too many variables
unless you build a road course to test this on. Even with your own course it
would be pretty hard to duplicate driving exactly. I guess we need to email
Mythbusters on this (they would probably have a hard time with it too).


On Dec 5, 2007 9:22 AM, the.jack <the.jack at verizon.net> wrote:

> it'll take more than a
> tank to have the ECU adjust properly to your new grade
>
> the.jack / Chris C.
> 99 Miata 5-sp Heliums w/ R-S2s
>
>
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-- 
Robert McElwee and Red Beast
1991 T25 Turbo @ 15 PSI
Link ECU, FM IC, 9:1 pistons
Over 350 lbs of "added lightness"
www.lightweightmiata.com

Lightweight Miata Forum:
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