Just got my Auto-Rx in the mail, i couldnt wait for it so i did my oil change about 200k ago. It doesnt specifically say anywhere but im under the assumption that i must first drain out approx. 12 oz's of oil out of my engine first? i know its not good to run your engine with too much oil.
You do not have to drain any oil, just add the 12oz of auto-rx and drive. How many miles does the car have? If you are unsure of previous history of the car and there are no leaks you should try the "heavy sludge application" Here is a link. http://www.auto-rx.com/pages/heavy_sludge_app.html
Basically, you add 12 oz of auto rx to your oil
Drive around 1250 miles...change your oil filter at this point(just the filter, not the oil)
Drive another 1250 miles ..this time change your oil AND filter.
Once you have changed your oil and filter, drive it for around 1500 miles....change your oil filter only
Drive for another 1500 miles ...change your oil and FILTER.
Q:Auto-Rx and Overfilling of the Crankcase A:The cleaning dose of Auto-Rx constitutes the addition of 12 fluid ounces into the crankcase. In any automobile motor this will not create an overfill problem with regards to sump capacity. Remember that we are only talking about just over 1/3 of a quart or liter. That will likely not even going to be readable on the dipstick, when comparing before and after the addition. To even further diminish the concern, the Auto-Rx will get some absorption into the deposits in the motor, such as varnish or sludge deposits as it begins to penetrate the binders of these deposits.
Also Auto-Rx, its blend of esters has some polarity. It will have an attraction to clean ferrous metal surfaces and some amount of Auto-Rx will remain on these surfaces after the motor has been turned off.
