Going to do an Auto-RX treatment on my 1999 RX300
#1
Driver School Candidate
Thread Starter
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
I bought a 1999 RX300 a month ago with 98K on it. It had great maintenance records with most of the oil changes accounted for. I know this engine is prone to sludge/gelling so I am going to be pro-active and do an Auto-Rx treatment. I figured I would document the progress every 400-500 miles or so. I took pictures of the varnish on the dipstick and it is rock hard. It will interesting to see if the treatment removes any of the varnish because it probably represents the situation inside the engine. I would pull the valve cover if I felt comfortable enough doing so, but I do not. I also posted on the Auto-Rx board and BITOG. Should be interesting.
Here is a link: http://auto-rx.activeboard.com/index...picID=33599536
Here is a link: http://auto-rx.activeboard.com/index...picID=33599536
#2
Driver School Candidate
Thread Starter
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
Alright to update: I changed the oil and added the Auto-Rx. I also changed the PCV valve. I understand why people are getting the K & N filter with the nut on it. What a booger to change out the filter. Going from underneath is almost as bad as trying to get it from the top. I went by the DIY in this section and it helped out alot.
Last edited by scottone92; 01-23-10 at 03:43 PM.
#6
Lead Lap
iTrader: (2)
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
Just looked at your post on the AutoRx site. The dipstick still looks awful but I've seen a lot of RX100 Oil filler caps (and the plate inside the oil filler hole in the valve cover) that have that crust on them like your - thought to be due to high temperatures where the oil tends sto splash and/or sit and gets burned. Not thought to be a problem.
#7
Driver School Candidate
Thread Starter
Trending Topics
#9
Lead Lap
iTrader: (2)
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
I recently finished up the sludge treatment for AutoRx. I just completed the "rinse" cycle. The vehicle is running great. More power better gas mileage. I have not seen any blue smoke yet. It seems to have totally been resolved. Also, I haven't burned ANY oil in the last 1,500 miles. I am running Mobil 1 0w30 synthetic now too. Car has never felt any better.
#10
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
My RX300 has 135K and has seen infrequent oil changes over the last 50K miles (with synthetic fortunately), has seen primarily highway miles, and has a dipstick which shows no varnish. Go figure!![Confused](https://www.clublexus.com/forums/images/smilies/confused.gif)
![Confused](https://www.clublexus.com/forums/images/smilies/confused.gif)
![Confused](https://www.clublexus.com/forums/images/smilies/confused.gif)
#11
Lexus Test Driver
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
The dipstick may or may not ever show signs of sludge or varnish. But, since you used synthetic you should be fine, just do a few quick oci's of a good synthetic oil with a high tbn such as pennzoil platinum or ultra (About 3.5k oci, to clean out any sludge or varnish).
#12
Lexus Champion
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
I bought a 1999 RX300 a month ago with 98K on it. It had great maintenance records with most of the oil changes accounted for. I know this engine is prone to sludge/gelling so I am going to be pro-active and do an Auto-Rx treatment. I figured I would document the progress every 400-500 miles or so. I took pictures of the varnish on the dipstick and it is rock hard. It will interesting to see if the treatment removes any of the varnish because it probably represents the situation inside the engine. I would pull the valve cover if I felt comfortable enough doing so, but I do not. I also posted on the Auto-Rx board and BITOG. Should be interesting.
Here is a link: http://auto-rx.activeboard.com/index...picID=33599536
Here is a link: http://auto-rx.activeboard.com/index...picID=33599536
Good oil choice! I`m using Valvoline Conventional oil in mine,and it works great.
#14
Lexus Test Driver
#15
Super Moderator
![](https://www.clublexus.com/forums/images/ranks/rank-smod2.gif)
![Default](https://www.clublexus.com/forums/images/icons/icon1.gif)
Today, I am supposed to get from Amazon my Lucas 0W30 and my K&N HP-2009 filter. I had planned to use either a Lubro Moly Engine Flush or perhaps a Gunk Engine Flush, but instead I am going to use about 1/2 a quart of Mobil 1 ATF to help flush out the system (something I used to do in Mexico before I used other Engine Flushes).
I think AutoRX is the best product out there though (though it does take some time).
I think AutoRX is the best product out there though (though it does take some time).