What kind of fuel should i use for everyday use
like wat kind of percentage of nitro methane or watever
ok i have a .18 engine engine, so the lowest can be 10%, what should be the highest?

It depends on if you are running a small block or big block.
Small blocks are up to a .18
Big blocks are .21 and beyond.

For everyday bashing with a small block you can use as low as 10% nitro. Big blocks, I would not go below 20% on.

I usually run 20% nitro in my small blocks for bashing. I have ran numerous brands from Traxxas, O'Donnell, Trinity, Blue Thunder, Byron Race Fuel ect and from 10% to 33%. I like to run 30% Byron Race Fuel in my truck when I race outlaw class.

Just buy a quart of 10% and run it, then step up to 20% nitro and re tune the engine and see what a difference 10% nitro makes. Some might say that switching nitro % from 10 to 20 or ever 10 to 30 will damage your engine. I have a RC10GT with a O.S. 15-CV that I bash with and I change the nitro % all the time in it. I have over 8 gallons of fuel ran through it and I've never had a problem with the engine. No rebuild, no signs of letting go. So changing nitro % is not a problem, if you do just reset the needles to factory settings and tune for performance.

edit.

The highest is what ever you feel like running. You can run 10% on through 33%. Good luck and happy bashing