Problem: Article: In order for the fuel to ignite at the proper time during the combustion cycle, you have to use at least the recommended minimum octane level. In the US this, is usually 87, but there are some higher end performance cars that require higher. Check your owner's manual if you are unsure what octane rating your car uses. If you discover that you have been using the wrong fuel, you can add an octane booster to your tank. It doesn't matter much which brand you choose as they are designed to simply increase the octane level of your fuel, allowing you to use the gas in your tank. Adding the booster is quite simple you just pour it into your gas tank. Using an octane booster to get through your last tank of low octane fuel is fine, but from now, on you want to buy the right kind of fuel. You should also keep in mind that whatever low octane fuel is left in your tank when you fill up will mix with your new fuel, so if knocking continues, go ahead and use the octane booster for another fill-up or two until most of the low octane fuel is gone. It is also thought that using a "top-tier" gasoline such as Shell or Chevron will decrease engine deposits that can cause knocking.
Summary: Check to make sure you are using the proper fuel. Add an octane booster. Buy the right gas.

INPUT ARTICLE: Article: Keep in mind that in order for you to become a Mechanic, your Blacksmith or Mastersmith should have a base level of 99 and a job level of 50 or higher. If you're qualified, travel to Yuno, also known as Juno, using the Kafra Service in Al De Baran. If you don't know how to get in Al De Baran, simply use the Kafra Service in Geffen City. Remember that you need to pay fees for their services. If you don't have any zeny with you, you can ask Priests to warp you to the location. If you can't find any Priests, just travel northeast from Geffen City. In case you get lost, you can open your map by pressing Alt +V. A menu will drop-down from the corner; click on the Map option to view your location. Once you get to Yuno, look for an NPC named Chainheart. He can be found near the Blacksmith, near the center of the city. To locate him, use the mini map at the upper-right corner of your screen. Approach the hammer icon on the map. He will tell you that you have potential. He will then introduce himself as a Mechanic. After the first dialogue, click him again to continue. He will explain to you what Mechanics are and why they're important. Click him again, and this time select "I want to know more." He will be surprised and continue, but at the end of the conversation, he will ask you to visit someone in Juperos Ruins. From Yuno City, exit south. Once you're in the field, travel to the next map through the south portal. From the second field, enter the portal in the east. For the third map, approach the island in the middle. You will find a glowing circle on the ground; get inside it to be teleported to the entrance of the ruins. Make sure you have enough Fly Wings to avoid any aggressive monsters in the field.

SUMMARY: Travel to Yuno. Look for Chainheart. Talk to Chainheart. Go to Juperos Ruins.

In one sentence, describe what the following article is about: This step only applies to single-action revolvers where you must manually pull the hammer back to cock the gun before you can fire. With your hands still on the grip, use your thumb to pull the hammer back until the second click. The first click is only the half-cocked stage used for loading the revolver. Make sure the revolver is already pointed downrange at your target before even touching the hammer. You do not want an accident discharge going in any direction but down the shooting range. There are normally two sights on a firearm. A front sight and a rear sight. The front sight is a small, fixed "blade" and the rear sight looks like a valley or a notch. To aim the revolver, place the front blade on the target, and then place the front blade in between the "valley" back sights. The front sight alone ensures that you don't hit to the left of right of the target, and making sure that the rear sight is also in alignment ensures that you do not hit above or below the target. Once you line up the target, you may be tempted to shift your focus back on the target and away from the sights, but even small movements will have an effect on your aim. Keep your focus on the front sight even if it means the target beyond it is a tiny bit unfocused. With your grip right and the revolver pointed downrange toward the target, you can now place your dominant index finger inside the trigger guard. Touch the trigger but no not place any pressure on it. You want to use the pad of your index finger and not the crease of the first knuckle. Aiming any gun can be a slow, precise process, especially for people new to marksmanship. One of the biggest mistakes people make is to try to hold their breath as they aim and shoot. Keep breathing and stay aware of your breathing. You ideally want to squeeze the trigger at the natural pause between the end of your exhalation and the beginning of your next inhalation. You do not want to jerk your finger back on the trigger because this will surely mess up your precision aiming. Instead, gently squeeze the trigger with the pad of your index finger while keeping the rest of your grip steady and your focus on aiming. Don't panic about the recoil of the revolver as you squeeze. Your solid, firm grip on the gun handle and your arm strength will cushion most of the recoil. Tensing up as you know the gun is about to fire is a sure way to mess up your aim as the revolver shoots. With the proper grip on the revolver, the recoil will push slightly more back than up. Keep your wrists locked and forearms tensed, as you had them for your shooting stance, and you will naturally absorb most of the recoil. However, you will definitely still need to take aim again before firing another round.
Summary:
Cock the revolver. Take aim. Place your finger gently on the trigger. Be aware of your breathing. Squeeze the trigger gently. Use your locked wrists and forearms to absorb the recoil.