Well last week I swaped my gas addicted GMC Sierra for something a little more easier, a new Toyota Tacoma. Well doing a little research about this truck is that it does call for 0w20. Which is only synthetic oil. And when Toyota produced the 2TR-fe engine for the 2005 model year they call for 5w30 oil. And I know i realize Toyota is giving me free oil changes for the first 2yr/25,000 mile but I cannot see how they can make you run a synthetic oil. I do realize these engines have a knock at cold startup but these things last many miles. I mean the running gear will oulast the frame on it. lol So anyone got any input on what I should do for oil weight and OCI? It will be having Mobil just not sure if its conventional or not!