funny u should ask this....i just bought some today for the old camry, almost 200k on it
well the guys over at yotatech.com swear by this product. i am goin to use the PCV line to feed it through. some use the vacuum line for the master cylinder but i think it might suck it in too quick. this one guy at yotatech hydrolocked his engine with this stuff. he ran it through the master cylinder vacuum line.