OLED 128x64 make text bigger

Question

I have a sketch that prints out a value from 0 to 100. I want it to take up the whole screen.

I can't figure out how to make the font bigger I think that the part of the code defines the size of the font is :

    oled.setFont(System5x7)

But if I alter the value 5x7 it just spits out errors messages.

This is all the code:

#include "SSD1306Ascii.h"
#include "SSD1306AsciiAvrI2c.h"
SSD1306AsciiAvrI2c oled;
#define I2C_ADDRESS 0x3C




int TankValue0;
int TankValue1;

void setup() {
  Serial.begin(9600);
  oled.begin(&Adafruit128x64, I2C_ADDRESS);
  oled.setFont(System5x7);
  oled.clear();
}

void loop() {
  int sensorTankValue0 = analogRead(A0);
  int sensorTankValue1 = analogRead(A1);
  TankValue0 = map(sensorTankValue0, 300, 785, 100, 0);
  TankValue1 = map(sensorTankValue1, 300, 785, 000, 0);
  if (TankValue0 < 0) {
    TankValue0 = 0;
  }
  if (TankValue1 < 0) {
    TankValue1 = 0;
  }
  if (TankValue0 > 100) {
    TankValue0 = 100;
  }
  if (TankValue1 > 100) {
    TankValue1 = 100;
  }
  oled.print(TankValue0);
  oled.print(" L");
  oled.println(" ");
  //oled.print("T1=");
 // oled.print(TankValue1);
 // oled.println(" ");
  oled.setCursor(0, 0);
  delay(1000);
}