I am the last person that will say nitrous is bad, hell I am building a drag car now that will be on the stuff. You are right there is alot of people that abuse it and that is why they mess there motors up. Now I also think you should not go any more then 75 on your stock stuff. This is just my 0.02 and you can use what you like. If you are going to use NOS then have someone put it on right and tell you how to use it.