[Gammix]

Look at your code, very poorly established.

Why isn't there any id's connection check. It will probabily slow down the speed.

pawn Код:

for(new i; i < MAX_PLAYERS; i++)
{
       if(IsPlayerConnected(i))
       {
       }
}

Just a tip, you can do

pawn Код:

fuel[vid] -= 1;

to reduce the value by any amount.

After the fuel limit is smaller than 1 (< 1), why havent you set isrefuelling[i] to false? This can cause problem.

pawn Код:

isrefuelling[i] = false;

Just use this to stop the engine when the vehicle start refueling.

pawn Код:

SetVehicleParamsEx(vid, 0, 0, 0, 0, 0, 0, 0);

Refer to the link provided by CalvinC.

The string size, I think 18 is enough.

pawn Код:

new string[18];

For future, use foreach for making loops life easy. And please use PlayerTextDraws for these kind of purposes.