Auto-RX will take a full year...

[bfg9k]

I am 250 miles into my first Auto-RX on my '98 Subaru Legagy L. Since it has 112k miles I'll the second course as well. I'm hoping to eek out a little more gas mileage and make up for the previous owner's lack of maintenance (tip: when the seller says "sure we have SOME maintenance records" - walk away.)

Observations: the startup knocking (common Subaru noise) is much reduced. This is often blamed on the oil pump and/or piston slap. Interesting. The oil in there now is Pennzoil Plat 5w30, which I will never get my money's worth on since I have to dump it in 1250 miles

In my defense, I wasn't planning on Auto-RX when I put it in!

After that I will use Havoline 5w30 for the remainder of the treatment and probably then just use that oil on a one-year OCI with an occasional UOA (or maybe the high mileage Havoline) for as long as I own the car - it's cheap, seems to work really well according to UOA's, and Subarus are easy on oil.

My only gripe is that the double auto-RX treatments will take about a year since I only do 6500 miles a year! My commute is 12 miles each way, 90% highway...

 

[Frank]

Auto-Rx will work as well over a year as over months
Think your benefits already outweigh additional time.

 

[Rick20]

I would not be concerned about the time frame. You will likely enjoy good benefits during the first clean and rinse phase. Ring packs clean up quickly, likely in the first 300 miles of the clean phase. Your second cleaning will be targeting other areas of the motor not fully cleaned in phase one. My bet is that you will feel benefits fairly soon.

 

[87nissanKC]

bfg9k, Sounds like you need to load up the Subaru and take a little trip. I keep thinking about visiting my brother after I put AutoRx in my truck. Its only 356 miles there. 700 miles round trip.

 

[JHZR2]

I wouldnt worry about the time, but IMO with a relatively short commute and low miles put on each year, it would likely be in your best interest to get out on the highway and put 100 miles on once in a while! It will help speed the cleaning process for sure, as youll rack up miles and the resultant movement, flow, heat, etc. which are the mechanisms of cleaning will occcur.

JMH