Rich Pierson

Replace both of the O2 sensors and do plugs, cap, rotor and wires, order
the Mopar HP wire kit, PN 4876436 @ about $46.00, stay with the stock
Champion plugs from the dealer, their champions look different then the
R12's the parts stores carry, I also run a K&N flat filter, I alternate
between it and a few stock paper ones, usually when I do its cleaning and
oiling cycle. I've been running my 98XJ on the cheapest gas I can find for
over 180,000mi. You might also want to have the injectors cleaned either
professionaly on a fixture where they remove them or head over to NAPA and
pick up the 3m fuel injector cleaning kit, comes with adapters that attach
to the fuel rail and a can of cleaner/fuel that runs for about 25 minutes.
The 3m kit does a good job but be prepared to spend about $90 or so in it
and another $20 for cartridge refills.

David C. Moller <david_moller@msn.com> wrote in
news:oo7fhv4papc6ovsvqjkuhp7n6pta2d9bbj@4ax.com:

> Recommended is 87 I believe.....
>
> Dave
> http://home1.gte.net/res0p2es/david/index.htm
>
> On Tue, 15 Jul 2003 19:47:13 GMT, "gug" <gug@gug.com> wrote:
>
>>Having purchased the 98 XJ used, we never got a manual with it. What
>>is the recommended gas grade? We usually put premium in it, because
>>it pings with lesser grades even after tune ups.
>>Thanks
>>Ryan
>>
>
>