This is an interesting question. I recall from my college days we were discussing this very same thing except with automobiles. Here's what we determined based on our observations of differences in the behavior between the two cultures, and pure speculation of course.
1. If it's an American auto, and the low-fuel indicator came on, chances are you better get to a gas station within the next 5-10 miles. This logic was based upon the idea that most Americans are procrastinators and will drive around with their tanks on E for as long as they[we] can get away with. Usually spending allot of money at once to fill-up our cars. When we see the Orange on the guage, or the light come on, we'd better pull into the next gas station we see or we'll be walking/pushing. Later on, I had a chance to test this and I found that once my light came on, I made it about 5 miles before I had to coast to a crawl where I could get out and push to keep the momentum going. I was 150 yrds. from the pump. However,I had transplanted a 350 H.O. into a'79 Monte Carlo that originally came with a V-6.
2. If it's a Japanese vehicle, then you could have as much as 20 - 60 miles before your car runs out of gas. This was based on the idea that Japanese cars were more fuel efficient, and Japanese ideology is to be more precise and pro-active when it comes to designing a product. In which case, being pro-active, they would be more apt to fill the tank when they got to around 3/4 to 1/2 full or empty, so as to spend even less money at the pump. This also causes the driver to think it didn't take as much gas to fill it up when the light came on, resulting in the illusion that the car was even more fuel effecient than first perceived. When they designed their cars, they wanted to be precise in nearly everything, including the warning indicators. I.e. If the coolant was low, it was low but not out and the temp. though slightly elevated, was not serious enough to cause a panic. Since most American "idiot lights" are usually too late anyway, because again, we're procrastinators - we wait to do things like check fluids and change oil. When a warning light comes on in a Japanese car, it simply tells the owner - "hey, it's nothing too serious right now, but you'd better check the coolant, or oil, or fill-up the tank when you get a chance." This further puts the driver or owner at ease, and re-inforces the idea that they are driving a higher quality vehicle - no need to upset anyone or put someone into a panic about it - it simply needs to be checked out whenever convenient. It could also add to the convenience of owning a Japanese car, because the car will tell you when you should check the fluids and change the oil - making the car appear to be "smart" so you don't have to manually do it yourself.
Now on cars with trip computers, you can easily see how far you can go +/- 2-3 miles depending on how you drive. In our Venture we had about 40 miles left, but keep in mind this happened in slow traffic, based on the current speed of 40 MPH.
So, based on what we previously determined about cars, it makes sense that we would still have 2-3 gal. of gas left in our RX-1's. If they were US sleds, probably .5 - 1 gal. left in the tank.
It was not my intention to stereotype anyone here, it was just a casual conversation that we drummed up in Psych. class. Unfortunately, I can't vouch for Ski-doo's because I don't know enough about the Canadian culture except to never pass up a petrol station when you're out in the bush. LOL.