I put a 1/3 of a can in the gas tank,intake,and oil,didn't smoke as much as I thought it would but my car idles so smooth now I can't even believe it.I have a b16 in a crx and before the whole car shook,it idled steady but not smooth and the throttle response is better also.I'm going to put a can in my 99 Si now that I know it's safe.It was definetly worth the 7 bucks I spent.

 

Be sure to change your oil ASAP.

 

Is it bad to leave it in the oil?

 

considering it broke the oil down, yes!!!

 

I guess I'll change it tomorrow.I put it in the gas to but that should be ok.