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Maintenance suggestions

My '98 Jeep Cherokee Sport 6cyl Auto trans has 160k with no engine or
tranny repairs done. The radiator and water pump were replaced at
120k. Maintenance has consisted of one set of plugs, one rear end
fluid change, oil changes at 7-12k intervals, two tranny fluid changes
and the usual brakes & tires.

I love this thing and plan to keep it for 250k miles. My mileage has
dropped from 20mpg to about 17ish and guess it's time to do a few
things. What would you-all suggest for maintenance now at this high
mileage?

Thanks,

Re: Maintenance suggestions

"Road Toad" <wo33446@juno.com> wrote in news:1140209103.619269.25240
@g43g2000cwa.googlegroups.com:

> My '98 Jeep Cherokee Sport 6cyl Auto trans has 160k with no engine or
> tranny repairs done. The radiator and water pump were replaced at
> 120k. Maintenance has consisted of one set of plugs, one rear end
> fluid change, oil changes at 7-12k intervals, two tranny fluid changes
> and the usual brakes & tires.
>
> I love this thing and plan to keep it for 250k miles. My mileage has
> dropped from 20mpg to about 17ish and guess it's time to do a few
> things. What would you-all suggest for maintenance now at this high
> mileage?
>
> Thanks,
>
>

Milage drop is almost always O2 sensors. Check your air pressure too, 4lbs
low can cost 1-2mpg. I run my at/ko's at 40.

Re: Maintenance suggestions

Re: Maintenance suggestions - Thanks !!

I'll check to see if I have the electronic ignition or not.......in any
event it's time for the plug wires and O2 sensor at least. Plugs
aren't due for another 20k but I may do the plugs while doing the
wires.

Oil used is Pennzoil 20-50 w/Fram filter at about 7-10k

Tranny at 60k

Brakes last 60k

Have a great day!

Re: Maintenance suggestions - Thanks !!

Which interval do you use for the spark plugs? From my experience with the
stock Champions, mileage begins to suffer after about 32k miles on a set of
plugs. I realize that you can clean them and get more miles, but they are
cheap and in my opinion not worth the trouble to reinstall used ones.

Your owner's manual calls for 10w30 oil. Unless you are racing this vehicle
or submitting it to extremely heavy loads (you are not) then 20w50 will do
nothing for you, but will rather decrease fuel economy.

If you want to use cheap paper element Fram filters, then fine. But they
are designed to go along with the wasteful 3,000 mile oil change promoted by
the oil companies. If you change the oil at 7-10k (many vehicle
manufacturers now recommend 7k) then you are beginning to rely on the filter
to trap particles. In that case you should use a good one.

The goal of responsible and economically sound vehicle maintenance is to get
the most mileage while spending the least amount of money. In my opinion
you will get more total miles from the vehicle, while spending some more
money, not a lot. Where exactly you get the best return for investment, is
a matter of some debate and individual requirements. You want to add into
the equation, that it is less fun to drive a vehicle that is not performing
as well as it could.

You have a great day too.

Earle

"Road Toad" <wo33446@juno.com> wrote in message
news:1140361909.974582.221970@z14g2000cwz.googlegr oups.com...
> I'll check to see if I have the electronic ignition or not.......in any
> event it's time for the plug wires and O2 sensor at least. Plugs
> aren't due for another 20k but I may do the plugs while doing the
> wires.
>
> Oil used is Pennzoil 20-50 w/Fram filter at about 7-10k
>
> Tranny at 60k
>
> Brakes last 60k
>
> Have a great day!
>