Alright, there are 3 main ways of making mitos in Drift City: Patrolling, Undercity Partying, and HUV partying. Patrolling: .
Patrolling involves driving through out t…he entire city fulfilling what is known as the instant mission. You drive into a Yellow Ringed zone just outside the appropriate Station. Patrolling usually takes about 8 - 10 minutes. The parts you get can be sold, and if you're lucky you can get a Mittron Enhancer, which sells for at least 20,000 mitos. To ensure maximum possibility of obtaining a Mittron Enhancer, you should not stop at any point in your patrol mission, and you should try not to miss and turnings by a large distance. Also, minimise head-on crashes with traffic. All these should increase your chances. Undercity: .
Undercity is where you have to form a party of 2 - 4 players, and head on over to; Moon Palace, Koinonia or Cras and head to the 'U' on the Map and enter the Under City. This is where you rid the Under City of infiltrators (HUBs) and HUVs, and finally a HUV boss('). To ensure a Mittron Enhancer reward, the whole Under City mission will have to be done within 30 minutes. To ensure the all members get a Mittron Enhancer, in Stage 1, each player has to take on 25 HUBs, and in Stage 3 and beyond 7 HUVs each. If you're lucky you can get an Mittron Enhancer and a Ore, which you can sell or combine to make amazing parts. HUVing .
Lastly, its HUV partying. Party with high level players, and you can obtain high exp and money. And if you party in Gate 3, 10 HUVs are not as rare to come by as in Gate 1 & Gate 2. One chase, with 10 HUVs can get you about 500+ EXP and 1000+ mitos for an all Level 50 party. Although, not all party members' level has to be that high. One charicter can be level 34 and the rest 65. I also want to note that you don't have to buy every V level. The V levels you should buy is V1, V3, V4, V6, V7, and V9. This will save you around 80,000 to 100,000 mito. So if you follow all these steps, you should be a millionaire in no time! ( Full Answer )