well the reason i change it every few weeks is because the bike is my daily driver. i drive it to and from work every day monday through saturday, and then to hang out with my friends. it gets a lot of miles run up every week, so i preferably try to keep low miles between changes. there is no odometer on the bike, so i don't know how many miles are on anything. i'll try your bike oil suggestion, and i have the perfect bike shop to go to in my town. thanks.
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