I believe DeSoto Frank has it right, the new gas will dry up faster than you think. Pour some on your workbench and watch it go away.
But, if you really cheap, like me, remember what you did as a kid and didn't have money for fancy new parts.
This is foolproof and free. Take the gas cap off, seal you face to the filler pipe and blow as hard as you can 3 times, then hold the pressure for the count of 15. Get in and start it. The only problem is releasing the pressure without swallowing or inhaling it. Say,,,,, maybe thats my problem.
No kidding, it does work.