1qt every 500 miles or so... I've tried absolutely everything: various oil
additives, thicker oil, combustion chamber/piston rings cleaner, etc etc...
no change whatsoever. What still puzzles me is that spark plugs are clean
and show absolutely no signs of oil contamination. And, there is no visible
oil leak anywhere.
You must have been burning the oil for ages and thus screwed up the
engine. Did you never see blue smoke coming out the tailpipe when you
RL (still holding thumbs my 99 Trooper will last for 300 000 miles...)
Never. Even had someone tail me and look for smokey exhaust.
I've had this truck for ~30K miles, oil consumption has stayed the same. I
guess my only option left is to rebuild the engine... figured out the cost
will count for at least 500qts of oil ;) so I'll just keep burning it until
rebuild is inevitable
did you try Mobil 1 15W50??....on our 98 Trooper, it helped the 1 qt
every 1300 miles to about 1 qt every 3000 miles.
I then mixed 15W50 (3 qts) with 5W30 (2 qts) and consumption stayed
about the same.
Then, I totaled it...:-(
Our "new" 2002 is up to 14,000 miles now...last oil change it used about a
half-quart (I think all at once more or less I'm guessing). Just changed
the oil before taking off on a vacation trip - towed an 18' travel trailer
over 700 miles and didn't use any oil that I could tell. I guess we'll
see...I'd like to think I've got a good one that doesn't use much if any
Not that specific one, but I tried 15W40 (can't remember brand now). Made
absolutely no difference
If Isuzu engines are indeed prone to seizures (read tales at
http://www.consumeraffairs.com/automotive/isuzu_engine.html ) then it may
have been a wise move ;) Yet I hope to keep driving my Trooper for years to
come - one of the best vehicles I've ever owned
I could easily be wrong, but after reading thru those messages, I'm left
feeling like half of them are whiney, made up stories. Plus, a good number
of them weren't even Troopers (Rodeos, etc), so you're talking about 2-3
different engines, not just the 3.5 v6. Ya never can tell when you find it
I sure hope you're right. Most of these sounded like whiners to me as
well... "just 15K miles over warranty, and they wouldn't replace it for
Off-topic, most of these manufacturers warranties are crap anyway. I used to
own Subaru Forester (warrantied for 60Kkm), and warranty on rear wheel
bearings somehow expired in 30Kkms...
Seriously speaking, am I damaging the engine by of burning large amounts of
I'm not a mechanic by any stretch of the imagination, but from what little I
do know, I wouldn't think it would hurt anything. I once thought my Dodge
Caravan was starting to smoke (turned out it wasn't) but I talked to a
mechanic about it (I've got the 3.0v6 that's very common in the older models
to wear valve guides and start smoking) and he talked prices, etc. I asked
him if it would hurt anything to just keep running until it got really bad,
and he said it wouldn't hurt anything, to just keep driving it until it got
really bad. Sounds like in the Trooopers, using oil is just a way of life.
I know for sure it is in the 3.2's, but I haven't had enough experience or
observations to be able to say on the 3.5's. Definitely don't let it get
too low though! :-)
From my experience, if you keep the oil level up, it will keep running just
fine. I have a 99 Trooper I bought with about 60K mi on it. I quickly
discovered that it would burn a quart of oil every 500 miles of normal
driving (a quart every 300-400 miles towing my snowmobiles) even using
20w-50 oil, I now have over 95Kmi on it and it still runs great. I had it
to the dealer who showed me a service bulletin from Isuzu that claimed that
a quart every 1000mi was normal and that consumption could be higher under
severe conditions which they said included sustained highway driving? They
checked the PCV valve which they said could cause increased consumption if
bad, however since the PCV was OK and that I was just out of warranty that I
would have to pay to resolve the problem any further. So I have just gotten
used to the practice of checking the oil at least every other fillup of gas.
So far so good. I would love to know if there is any way to fix this short
of a complete engine rebuild. I had a 92 Trooper for over 10 years and
128Kmi and was very happy with it (once I found out about using synthetic
oil to get rid of the valve tapping) but don't feel that confidence in the
newer one with this oil consumption issue.
Brett W. Rohlfing
Same here. I've had some success with STP oil additive - that one seems to
cut oil consumption about 30%. However I suspect the effect is only
temporary as I'm still pouring oil into it, and thus displacing the
additive. 35K miles and counting... still runs good.
There's one thing I haven't tried so far, and it's complete engine flush.
Fairly pricey, though.
what seems to work for me is a combination of 0W-30 synthetic and lucasoil (also
the lucasoil additive completely silenced the tapping which the synthetic oil
did not do
consumption is also down
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