new admincar;

admincar = CreateVehicle.....

if(vehicleid == admincar)
{
// do smth
}

// Create an array that can hold up to 2000 vehicles (samp limit), put this at the top of the script
new StaticVehicles[2000];



// Use this to create a vehicle during OnGameModeInit:
Vehicle_AddStatic(VehicleModel, x, y, z, rotation, color1, color2, spawndelay);
// Example:
Vehicle_AddStatic(462, -475.0, -523.0, 26.0, 90.0, -1, -1, 600);


// The function:
Vehicle_AddStatic(vModel, Float:vX, Float:vY, Float:vZ, Float:vRotation, vC1, vC2, vSpawnDelay)
{
    // Create a new static vehicle during GameModeInit
    new vid = AddStaticVehicleEx(vModel, vX, vY, vZ, vRotation, vC1, vC2, vSpawnDelay);
    // Set this vehicle as a static vehicle
    StaticVehicles[vid] = 1;

    return vid;
}



// In OnPlayerEnterVehicle:
if (StaticVehicles[vehicleid] == 0) // Check if this isn't a static vehicle
    SendClientMessage(playerid, 0xFFFFFFFF, "You entered an admin car");

// Top
new
    MaxStaticVehicles = 0;

// GamemodeInit
MaxStaticVehicles = AddStaticVehicle(...) // this will be the very LAST STATIC VEHICLE

// Anywhere
stock IsStaticVehicle(vehicleid)
    return (vehicleid <= MaxStaticVehicles) ? true : false;

new CreatedVehicleVar[MAX_PLAYERS];

CreatedVehicleVar[playerid] = CreateVehicle....

public OnPlayerEnterVehicle(playerid, vehicleid, ispassenger)
{
    for(new x = 0; x < 500; x++)
    {
        if(vehicleid == CreatedVehicleVar[x])
        {
            //"Let's say that the car is spawned.." ;D
        }
    }
    return 1;
}