Originally Posted By: fuel tanker man
Originally Posted By: RonH
I used Castrol GTX 10w40 winter, 20W50 summer in an old KZ650. Original clutch still working fine with 160,000 plus miles. However even though oil was changed religiously since new every 2000 miles, by 160,000 it was full of sludge. I'm not talking a thin layer, I'm talking I went to drain oil that last time and 8 oz of 90wt sludge oozed out, the rest of the 3.5qt was permenantly caked in the engine with the previous. Castrol does not like a worn engine. Maybe no oil would, but this was an exceptionally bad example.
Help me understand this... are you saying that only 1/2 a quart would drain out, and the other 3.5 quarts would not come out of the engine? How many oil changes prior to this with Castrol? Or were you using some other brand of oil?
And... how did you get the goo out of the engine??
Dan
I used Castrol GTX the entire 160,000 miles. Everything was fine for a long time, then I started seeing sludge, which within 10,000 mile time turned from just a little to major amount. I drained that 8 oz of "oil" out of the engine and yes that 3qt stayed in the engine. That was the end of running that engine. I never attempted to remove the sludge or run the engine again.