hello everyone, todays question is "what do u think about using engine oil
treatments like red line, royal purple, lucas, is it good to use in motors
with 200k+ miles."? the reason i ask is because my 93 xj has that many miles
and i'm changing my oil from 5w-30 synthetic to 10w-30 ...

   Just looking for input on what you think of the 5.9 Grand Cherokee from
1998 as a reliable vehicle. I have a 1993 with the 4.0 inline 6 that has
been great for over 265,000 miles. Is the V-8 as reliable? I know this V-8
was a special order type thing and is a real fire-breather. ...