I can't seem to turn down how much oil we're getting. I've changed the PM's right down to 1 min and 1.2 max. The only progress i've made is going into the data file and changing the Work Needed line but I cant change it 24/7 to keep up with new ones placed. any advice how to control it a little better?

{
  "Prefix": "[BackPumpJack]:",
  "Prefix color": "#00FFFF",
  "SteamID icon": 0,
  "Block hurt other player's oil crater": true,
  "Block deploy pumpjack on other player's oil crater": false,
  "Permission List": [{
      "Permission": "backpumpjack.use",
      "Priority of permission": 0,
      "Oil crater chance": 20.0,
      "Minimum PM size": 5.0,
      "Maximum PM size": 10.0
    },
    {
      "Permission": "backpumpjack.vip",
      "Priority of permission": 1,
      "Oil crater chance": 30.0,
      "Minimum PM size": 5.0,
      "Maximum PM size": 10.0
    },
    {
      "Permission": "backpumpjack.vip2",
      "Priority of permission": 1,
      "Oil crater chance": 35.0,
      "Minimum PM size": 5.0,
      "Maximum PM size": 10.0
    },
    {
      "Permission": "backpumpjack.vip3",
      "Priority of permission": 1,
      "Oil crater chance": 40.0,
      "Minimum PM size": 5.0,
      "Maximum PM size": 10.0
    }
  ]
}​

No good advice.
You can only modify "workNeeded" in the data file.
PM Size = 45 / workNeeded

I was able to fix it :) I went into the gather manager config and added crude oil modifier to the quarry output and reduced it and it worked!