My car burns enough oil that I have to put about 2 quarts in between 5k oil changes and with the price of mobil 1 I just can't see spending so much on oil just to burn it off. I'm thinking of using valvoline or castrol gtx but would like to hear what some of yall are using and what you think of it. I realize this may have been covered several times but the search function would not let me search "convention oil" or "oil" so this is why i'm asking.