1999 Isuzu Trooper: excessive oil consumption

Filed May 10, 2019 · Engine · 73,000 miles · CA

75000 miles. Burns a quart of oil every few hundred miles. No oil light comes up. I ran it almost out of oil in 06/2018

Filed Feb 23, 2010 · Engine · 50,000 miles · KS

99 isuzu trooper 3.5 engine burns oil excessively. I am original owner and regularly serviced per owners manual. At 50k miles, engine oil light turned on 2,500 miles after oil change and was over 4 qts low. Engine now at 60k mi and burning approx. 1 qt per 600-700 miles. Seems to be common engine defect known by mechanics and owners, but isuzu unwilling to acknowledge problem. Though monitoring constantly, I am just waiting for significant engine failure.

Filed Sep 11, 2006 · Engine · 66,366 miles · WI

From the time I bought the vehicle when it was only a couple years old, every time I brought the vehicle in for an oil change, they said it was almost empty of oil. I brought it in to a dealer several times since it was under warranty. They could never find the reason for it burning oil. Every dealer said it was a common issue with the isuzu, but they could not fix it because they could not find the problem.

Filed Feb 19, 2006 · Engine · TX

My 1999 isuzu trooper engine seized up. No warning light or any indications that any thing was wrong. Towed it to a mechanic and they said it had no oil in it. I had just purchased the vehicle 1 month earlier and had the oil changed/filled immediately after the purchase. I had driven it less than 2000 miles. I now see this problem has been well documented on the internet. Now I am having to replace an engine which could be more than the cost of the vehicle because the manufacturers oil consumption defect and lack of low oil gauge/warning.

Filed Feb 15, 2006 · Engine · UT

I purchased a new trooper in 1999 and did every required maintenance on time at a authorize isuzu dealer. After the 5 year 60,000 mile warranty was up we started taking it to a reputable national oil change company. We never had any indication it was using oil at an abnormal rate. It was not leaking oil, it was not burning oil and the oil light was not coming on. One day the oil light came on and my wife immediately pulled over and we added oil. It would run rough and took it to a mechanic who did some maintenance work. I had not totally wrecked the engine. I got it driving good for about $2,000 and hoped this had fixed the problem. We added and check the oil every 500 miles. Two months later the engine seized and I am now told I need a new engine. After searching the internet I have found many others have had this engine oil problem. Estimated costs to replace the engine are $4k-$6k which is about blue book for the trooper and now I would have no confidence in putting a 1999 engine with known problems in as a replacement.

Filed May 9, 2005 · Engine · 70,000 miles · ME

I own a '99 isuzu trooper. Since about 70k miles (about a year ago), it has been burning oil at a really high rate. I have met personally two other trooper owners with this problem who were lucky enough to get new engines out of isuzu, but since I was over the warranty, I don't qualify. Now I have read many other similar complaints on the federal safety agency site and wonder why isuzu has not been held accountable for this? I cannot afford to replace my engine, nor can I in good conscious trade it in and make it someone else's problem. I am burning 3 quarts of oil for every 300 - 500 miles! I am afraid to take it on any trips to visit family! I feel I am being punished for owning this vehicle and keeping it in good repair!

Filed Mar 5, 2005 · Engine · MS

99 isuzu trooper uses oil in excess and is now leaking coolant from under motor ??? Go figure!! It's not even at 70,000 yet. Isuzu needs to help customers who have purchased their worthless vehicles. It seems they knew exactly what mileage to stop the warranty at!

Filed Mar 2, 2005 · Acceleration, Body · 40,000 miles · DC

Isuzu trooper 1999 problem after problem, engine burning oil. *bf after the engine was replaced, the engine light illuminated at least 30 times. The dealer gave the consumer all types of excuses until finally they said they didn't know what was causing the light to illuminate. There were other problems such as a hard shift with the transmission, water leaking through the sun roof, difficulty starting the vehicle, uneven tire wear, in just 65,000 the consumer has gone through 3 complete sets of tires. The consumer was told there was a problem with the frame of the vehicle and it could not be aligned. The tie rods were replaced because they were defective. In the past the vehicle lunged forward while the consumer had her foot firmly pressed on the brake. The vehicle intermittently idled high while stopped. The vehicle has rolled backwards while it was in park. Another mechanic informed the consumer the previous dealer installed several electrical componets incorrectly and there were also some defective parts that needed to be replaced which caused the engine light to come on. The consumer was getting poor gas mileage.

Filed Sep 30, 2004 · Engine · WV

1999 izuzu trooper oil consumption ( a quart of oil every 450 miles).

Filed Aug 18, 2004 · Engine · 82,000 miles · MO

1999 trooper with 3.5l engine. After 60,000 miles I noticed that at regular oil change intervals, @3000 miles, that the engine was buring an excessive amount of oil. After an oil change, I drove from st.louis to kansas city, about 240 miles one way. On the return trip, 60 miles from home, the trooper siezed up. No warning lights, no low oil light, it just quit. I had it towed to the dealer in st.charles and they told me that it had hardly any oil in the crankcase and that the engine was ruined. Several months later after listening to the price for an engine from the dealer $9500 and rebuilt engines that would take several months because blocks were not available, I with the aid of a mechanic found a trooper that had been in an accident and replaced the old engine with one that had around 72k miles on it. It burns the same amount of oil!!!!!!! I check it weekly and add to it about the same. Isuzu needs to make good on this piece of crap. I'm the original owner and now I couldn't get rid of this thing for 1/25th of what I paid for it, except to someone looking for parts for their soon to be broken down 1999 trooper.

Filed Jul 15, 2004 · Engine · 22,000 miles · NJ

I have a 1999 isuzu trooper that has a chronic oil consumption problem. I had the dealer replace piston rings at 22,000 miles but it did not significantly reduce the problem. No, I am noticing a number of trooper owns with the same problem or even with engines that have seized from a direct result of the problem. I spoke to the local isuzu service rep in new jersey and he finally owned up to the fact that my particular year has a know engine defect that will cause it to burn oil. I burn it at a rate of approximately 700 miles to a quart of oil. The rep has told me that they could replace the engine but with the replacement there is no guarantee I would get better than 1000 miles per quart of oil.

Filed Jul 14, 2004 · Engine · 128,000 miles · WV

1999 isuzu trooper purchased new. Began experiencing excessive oil consumption between oil changes around 50k miles. Regularly took a qt of oil every 1k miles. Oil and filter changed every 3k. Dealer service manager said this was normal oil use for this engine. At 128k engine fails 4 hrs from home (sept 2003). Nearest dealer is called and says it has thrown a piston due to lack of oil. We pay to have the vehicle towed back to our local dealership service department. Engine is replaced at our cost. We have engine dismantled by ase certified mechanic and the failure was a spun rod bearing. No evidence of lack of oil. This is a terrible engine and would recommend anyone driving an isuzu with this engine get rid of it asap.