</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">I also think Amsoil is very good too. </font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">I used Amsoil at the beginning of the summer and was shocked at the amount of buildup on the plug after 2500miles.Although I used to have a very high opinion of Amsoil, I can honestly say that it scared me so much that I will never touch the stuff again.
</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">The more recent stuff with tighter clearances can't handle that type of abuse. </font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">What tolerances are you referring to? I myself do not consider a motor that comes new from the factory with piston slap as having tighter tolerances.
</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Basically all of an engines wear comes on startup anyway and NO oil will protect it from this only a prelube oil pump </font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">When the day comes that I build a big buck motor, I will definitely have a pre-lube setup on it.

<small>[ August 06, 2002, 09:46 AM: Message edited by: StevieZ ]</small>

 

My wifes Mercedes goes anywhere from 10k to 14k between oil changes (based on the computer and driving habbits etc). MB uses M1 Tri Synthetic.

I go 15k hard miles in my Dodge Dakota QC4x4 with the 4.7L engine. Hard miles and I use M1.

I did the same on my 99 5.3L Silverado, 15k miles between changes on M1.

On my 99Z, I use Valvoline Syn and change by 2k miles or sooner. <img border="0" title="" alt="[Wink]" src="gr_images/icons/wink.gif" /> I get crap on my drain plug on every oil change. I use to us M1 and changed and the crap is still there. Definitely picked up after heads/cam.

Eric

 

Guys,

Again, can any of this sludge be attributed to the fact that I just ran the GM top-end cleaner through my motor?

 

Another vote for "always had sludge". I have had the goo on my oil plug since I purchased my car.

Another vote for "got worse after H/C" as well.

 

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif">Originally posted by Patman:
<strong>Engines based on older styles like that truck are more tolerant of stuff like that though. The more recent stuff with tighter clearances can't handle that type of abuse. Some engines were just built so bulletproof that they can handle infrequent oil changes like that.</strong></font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Sorry, I do not see the difference, the ls1 is not built any "tighter" than the venerable small block chevy... <img border="0" title="" alt="[Smile]" src="gr_stretch.gif" />

 

I would say if you really don't think it was metal, and was some kind of goo, it may have been from the cleaner. I was under the impression you should change your oil after you use that stuff. If it is from the cleaner, maybe pull a couple of plugs and see if there is any crap on them too.

Jim

 

</font><blockquote><font size="1" face="Verdana, Helvetica, sans-serif">quote:</font><hr /><font size="2" face="Verdana, Helvetica, sans-serif"> I would say if you really don't think it was metal, and was some kind of goo, it may have been from the cleaner. I was under the impression you should change your oil after you use that stuff. If it is from the cleaner, maybe pull a couple of plugs and see if there is any crap on them too.
</font><hr /></blockquote><font size="2" face="Verdana, Helvetica, sans-serif">Magnets attract metal.
If it is on the plug, then it's metal.