Couple of questions, would very much appreciate some input. Because the vehicle is built in the US, it calls for 5W-20 on the oil cap. 5W-20 is not a viscosity available in the Persian Gulf. Owner's manual has a chart with viscosities ranging from 0W-30 to 20W-50, depending on ambient temperature. Mitsubishi's recommendation is 15W-40 for conventional oil, unless the vehicle is operating is severe conditions, in which case 20W-50 is recommended. First question is related to break-in. I am going to be replacing the factory fill/filter at 800 km (500 miles), then again at 1,600 km (1,000 miles). I've got two oil options available: Motorcraft Synthetic Blend 10W-30 or Pennzoil Long Life Gold 15W-40. Regardless of what I opt for, I will be adding a maintenance dose of ARX. I'm siding with Motorcraft, as I will only be running it for 800 km and it is a wee bit cheaper. But would not mind using Group II Long Life Gold for an additional $10. Any recommendations? Second question is I will be running synthetic oil in this engine. I would like to go with PP, but it is only available at one outlet and they're ordering system sucks. They only order 72 1 quart bottles at a time, and the local 350Z guys sweep up the place as soon as PP 5W-30 makes an appearance. I don't want to keep switching oils, so I've decided to stick to Mobil 1 because it is widely available at all times. That said, as Mitsubishi recommends 15W-40 conventional, I'm considering M1 0W-40. Should I stick with it, or is M1 5W-30 a better option? Any synthetic lubricant must meet ACEA A3/B3 or A3/B4 at minimum, but A5/B5 is recommended. Thanks!