I just pulled the oil from the 1st Auto-RX Rinse cycle of the >100K mile program on my recently acquired Winter car which has about 145K Miles. I was struck by how dirty the oil looked and a fair amount of grit and thicker sludgy stuff settled out.
The grit surprised me, although the previous cars I auto-rxed were much cleaner to begin with. It is not crystals of ARX or anything. It looks like sand sucked in. What am I looking at here?
Anyhow to run the second clean cycle i had two litres of Castrol GTX 5w30 (the recommended grade for this 1994 Mazda MX-3 with the 1.8L V6) and I mixed that with 2 litres of Castrol GTX 5w20 and the 9 ounces of ARX.
I have heard some people suggest that all 5w20 SM oils MUST be semi syn. I doubt this, (especially in Castrol GTX, since presumably they would label anything above Group II as Syn) but am I potentially impeding my AutoRXing if I have it mixed in 50/50 in my clean and rinse?
My post on my current mixing:
http://theoildrop.server101.com/cgi/ultimatebb.cgi?ubb=get_topic&f=1&t=014307
The grit surprised me, although the previous cars I auto-rxed were much cleaner to begin with. It is not crystals of ARX or anything. It looks like sand sucked in. What am I looking at here?
Anyhow to run the second clean cycle i had two litres of Castrol GTX 5w30 (the recommended grade for this 1994 Mazda MX-3 with the 1.8L V6) and I mixed that with 2 litres of Castrol GTX 5w20 and the 9 ounces of ARX.
I have heard some people suggest that all 5w20 SM oils MUST be semi syn. I doubt this, (especially in Castrol GTX, since presumably they would label anything above Group II as Syn) but am I potentially impeding my AutoRXing if I have it mixed in 50/50 in my clean and rinse?
My post on my current mixing:
http://theoildrop.server101.com/cgi/ultimatebb.cgi?ubb=get_topic&f=1&t=014307