Wow, ya sure know a bit about them MR2s
another non ricer, ricer.
I used the "fill er up when the light comes on" trick for a while, untill I started up an overpass and only made it half way up, darn light died.
Often fuel gauges are set wrong from the factory, Cadilac produced a car with a gauge that worked and customers complained of bad fuel economy so they went back to the industry standard of top half = 2/3 of the tank, bottom half = 1/3. Try it sometime, fill up most cars at 1/2 a tank and you'll put up to 2/3 of the capacity not including reserve in. This is also why you can drive most cars 30-60 miles before the needle moves off of full.