Non Mopar,...GM 6.0 V8,...Info Needed

I have an LS in my 2000 Chevy pick up that has over a quarter million miles on it. Except for regular maintenance, and replacing the A/C compressor, it's never needed a "repair". and 18-20mpg's all day long.

Also have on in a 2008 GMC that just turned 100K, no sweat. 17-18mpg, all the time.

Not particularly a GM fan, but don't hate them either. Good service with the LS engine. 2 out of 2 for me.