Tbh, we all went through that pain earlier. Getting 200k oil was not easy for us either before the tactical helis. As written below, its not easy to defend your oil ref against raiders, miners combos. In the times when i needed the oil for those upgrades played some 3-4 hours without interruption too... As said... Say thank you for Nexon and use it until it lasts... if you don't like it, spend your oil till it gets nerfed.