Had an 2001 Corolla 2.0 D4D. Sat in my driveway for 4 years, had lost the keys to it. Found the keys and charged battery, started right up first time. Had a full tank of stale petrol, thought why not lol, drove it and nothing happen, old oil inside, most of it was probably dried up, still no problem. Everything seemed to work, only the bodywork was in tatty condition as it was parked under a big tree and it had gunk all over the car which wouldent come off. In the end sold it and someone who came to take it took it to Nigeria the next day! Goes to show how good these engines are and even when you neglect them, they're still loyal to you. If this was a VW or any German car, it would of refused to even start up.