I always here people telling me that all the oil out there is bottled at the same plant and they just change the bottles so you might as well buy the cheap stuff. I also hear that all gas is the same, all grease is the same, all parts are made in China by the same company etc..... Well I call bull on all that. Here is a good example. People say it doesn't matter what air filter you buy, they are all the same so buy the cheapest one. Look at these 2 filters and see if you can notice the difference other then the one on the left being used and the one on the right being new.