Castrol GTX causes varnish?

[LeakySeals]

I'm claiming stained by connecting dots, not looking at each dot separately.

On this engine it means something, on another maybe not. Castrol ok for some, for others like you no good. You need a high temp oil. Excludes Castrol. Syns are better in heat. Still excludes castrol

And fresh coolant often. Thats about it.

 

[Smokescreen]

I tried GTX once. It had the worst pungent odor of any oil I had ever tried when drained. I went back to a ST or whatever else was cheap that I was using and nasty smell was gone the next OCI...that is my only exposure to it.

 

[OVERKILL]

Originally Posted By: LeakySeals
One more. In the 70's it was SE, then it was obsolete and "will cause equipment harm". Then it was SH, now thats obsolete. Then it was SJ/SL.. Ouch! that eats the catalyst.. On to SN. What will they find out in a year or 2? According to BITOG SN is the end of the line, its the perfect oil, all problems are solved. Nope, if your bought into the latest "SN" API standard solving all deposit related oil problems, and any API SN oil is fine, your simply repeating the errors of the past.


An interesting way of demonstrating the inadequacies of the API rating system is to use the Lubrizol relative performance tool. You can contrast the API certs to the ACEA ones, but I like using the manufacturer specific approvals more:

http://origin-qps.onstreammedia.com/orig...p/pc/index.html

You'll noticed how much more stringent the MB and Ford approvals are than the basic API SN one.