Somebody at work asked me about oil and fluid flushes today. No surprise car MFGs like Nissan don't recommend them and they won't provide warranty support for any fluid flushing related/caused failures. See Nissan's notice to dealers on page 3.
http://www.scribd.com/full/20453285?acc ... 1zrujbsbst
There are some machines that assist only with fluid changes and don't introduce solvents or pressurize the fluid during the change process. These machines aren't the same as the flusher machines Nissan is referring to.
