[wagonman76]

GM has used sealed bearing cartridges on cars for at least the last 30 years. Probably longer. But sometimes the seal is separate so if you wanted you could flush out the old grease with some solvent and pack in the grease of your choice. But if you use a thinner grease it will likely just all run out.

I have heard the Aveo is geared pretty high numerically, so lazy folks don't have to shift as much. But it hurts what could be better mpg too.