Isuzu bulletin confirms oil use bull****

[deermagnet]

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[Gussie2000]

Can't believe this mark

It's unacceptable this "bulletin" information.

All isuzu engines are almost the same in context & configuration;I can't understand how they came down with this conclusion


I use around 1 quart every 1K & i can assured you i don;t drive my horse hard in any way,my driving commute is 95 % city & 5% highway i got to mention that i drives around 15 miles on a daily basis.

Isuzu engines are a huge fraud to every one of us,i'm so sorry original owners paid 30K for this crappy engine.

[Solitude]

the ascender and the pickups are Government Motor manufactured

[VX KAT]

Mark- I can't be sure, but seems like I'd seen this info before...so I dug out an older post I printed in the Engine Failure Poll? and printed the "Isuzu Engine Oil Usage Test/Report" there. It listed "Normal Engine Oil Consumption w/i limited powertrain warranty period" for the group that included the VX and it listed that same "normal" of 1 qt/1000 miles... depending on conditions.

How does this new info you posted change or affect that? Or is this just further evidence of them knowing there's an "issue" (!) and tells the dealer what to "tell" the customer?

[BigSwede]

Many manufacturers call 1 qt/1000miles "acceptable", not just Isuzu.

[nfpgasmask]

My VX still drinks like there is no tomorrow. It's just something I have come to live with. But this is good to know and read straight from the horses mouth. You should also post this on the Planet if you haven't already.

Thanks,

Bart

[Gussie2000]

We've known all along that Isuzu said 1 quart in 1000 miles was acceptable. I posted that dealer oil useage report here a while back.

This new document that we're seeing for the first time says that 1 quart in 1000 miles is NOT acceptable in these other engines. They knew there was something wrong on the first gen 3.5L that we have, so they came out with the bogus 1/1000 figure so they wouldn't have to repair thousands of engines.

This is also the first time we've seen that anything over 36,000 can use any amount of oil and that won't get a warranty repair. So over 36K their engines are too old to expect normal oil useage? That should be a major embarrassment to Isuzu.

What does it matter which engine is using 1 in 1000? It's not acceptable in those newer engines and it shouldn't have been allowed to happen with our engines.

That's where I come off.

Mark Griffin

X 2
I bought my horse @ 38K miles & oil compsumtion was notorious;The previous owner did all maintainance on time (carfax certified shows all records of maintainance).
Another BS is the warranty,why a 2nd owner shouldn't enjoy the same warranty period as the original owner ?
Specially an very low mileage vehicule.
As how my mech always told me: 36K warranty for a well reputated car manufacturer such as isuzu is just shamefull & that is what many customer should look at when they were about to choose any isuzu products.
If isuzu,as they state BRUTALLY TESTED their engines to meet higher standarts & prove their quality/reliability/dependability why offers only 36K powertrain warranty / 5years ?

As my mech also said : they knew what was coming when they decide to put this 3.5L engine into production.

Yes,almost all manufacturers says that 1q of oil every 1K is normal,but it doesn't mean that right after 36K miles you engine should be burning that amount of oil,cylinder walls,O rings & pistons should be still brand-new at that mileage UNLESS there's a factory flaw in its design/manufacturing process;My brother-in-law old '95 pathfinder had 340K miles on it & never experience oil burn although nissan's bulletin disclaimed the same average oil burn is ok.
All this bulletin does is proving isuzu's misstep & now i wonder how isuzu being the japs automobile pioneer (since 1912) didn't master this kind of situation long time ago & customers had to wait 'till they built the best fuel engine up-to-date back in 2002 with the axiom D.I. system.
90 years is a long way to go for sure.

[pbkid]

ya, i was gonna say that my integra has 250k miles and still doesnt burn a drop of oil....

[circmand]

X 2
I bought my horse @ 38K miles & oil compsumtion was notorious;The previous owner did all maintainance on time (carfax certified shows all records of maintainance).
Another BS is the warranty,why a 2nd owner shouldn't enjoy the same warranty period as the original owner ?
Specially an very low mileage vehicule.
As how my mech always told me: 36K warranty for a well reputated car manufacturer such as isuzu is just shamefull & that is what many customer should look at when they were about to choose any isuzu products.
If isuzu,as they state BRUTALLY TESTED their engines to meet higher standarts & prove their quality/reliability/dependability why offers only 36K powertrain warranty / 5years ?

As my mech also said : they knew what was coming when they decide to put this 3.5L engine into production.

Yes,almost all manufacturers says that 1q of oil every 1K is normal,but it doesn't mean that right after 36K miles you engine should be burning that amount of oil,cylinder walls,O rings & pistons should be still brand-new at that mileage UNLESS there's a factory flaw in its design/manufacturing process;My brother-in-law old '95 pathfinder had 340K miles on it & never experience oil burn although nissan's bulletin disclaimed the same average oil burn is ok.
All this bulletin does is proving isuzu's misstep & now i wonder how isuzu being the japs automobile pioneer (since 1912) didn't master this kind of situation long time ago & customers had to wait 'till they built the best fuel engine up-to-date back in 2002 with the axiom D.I. system.
90 years is a long way to go for sure.

10 year 120000 limited powertrain
72 month 100000 anti coorosion
36 month 50000 mile limited warranty

[JHarris1385]

http://www.vehicross.info/forums/showthread.php?t=14049

[Gussie2000]

http://www.vehicross.info/forums/showthread.php?t=14049

Sorry Jharris !

I don't see how this mod can even get close of solving the oil compsumtion in anyway because the source of the problem is not the oil filter or anything related to it.

Oil pressure is neither the problem,you can have the recommended 4 qt of oil in the engine or bit less & still have the proper oil pressure in there.

As far as i'd seeing the real issue here is the engine its self.
Lack of proper engineering designing this engine is the real issue and nothing else but that & the fact Isuzu had to go sent its engineer team back to the drawing table & spend more money to redesign the entire engine probes it & of course,way more cheaper then recalling our 4000 and + engines ( that's not including troopers & rodeos )

Anyways i did found your idea about the oil filter mod interesting.

[JHarris1385]

Oops wrong link...let me find it

[BigSwede]

My 99 Trooper didn't burn any oil with Mobil One 5W30, but it only had 65K on it when it got totaled so who knows what it would have done later on.

Personally I think the synthetic would be better for keeping the oil ring holes clean, due to less sludge and varnish formation.

[SlowPro48]

Could be. I imagine when it's that close to the combustion process, the temps are high enough to cook even synthetic oil though - and then it doesn't have the detergent to clean up after itself. The main advantage of a diesel spec oil is lots of detergent - and lots of moly - and that's why I use it. It's gotten my old pickup truck to 320,000 miles now with no oil burning - but then I've never tried synthetic in the VX for a direct comparison so all I'm doing is speculating that my VX is better off (from an oil burning standpoint) with thick, high detergent oil. I guess I should try some Mobil 1 in the VX for the sake of science but when I used Mobil 1 in the YZF it led to such a dramatic increase in oil consumption that I didn't want to try it out in my VX. There's a big difference in running low and trashing the bearings in a 13 year old sport bike that you only use for riding around in circles on the weekend and pitching a rod through the block of your main transportation.

I personally think there's more to the story than just oil drainback holes. There are people like me using molasses and doing fine and then there are plenty of people such as yourself who are doing fine with lightweight, low detergent oil. There's some other variable in this equation. Maybe more than one. That's the way it is with my life in general - whenever something goes wrong it's usually not one thing - it's a convergence. I bet there are some Isuzu engineers out there in the world who know what the problem is but we probably won't ever hear about it. Maybe someday one of us will delve into an oil burning engine and inspect it thoroughly before it goes caput instead of waiting until it starves a bearing and then replacing it with a whole engine or long block. It's hard to diagnose the problem via old school methods what with catalytic converters mucking up your visible emissions experiments. In the good 'ol days you could tell whether the oil was sneaking past the rings or past the valve seals by when you saw smoke. If it was a puff of VE upon cold startup (after sitting for a while) but it went away after a few seconds it was a classic sign of oil sneaking down the valve guide. But when that happens in your VX, did the VE go away because it was the result of small amounts of oil that accumulated in combustion chambers overnight as a result of leaky valve seals? Or is the smoke from a lot more oil sneaking past the rings on a continuous basis - and it goes away not because the oil burning stopped but rather because the catalysts fired up?

[BigSwede]

I personally think there's more to the story than just oil drainback holes. There are people like me using molasses and doing fine and then there are plenty of people such as yourself who are doing fine with lightweight, low detergent oil. There's some other variable in this equation. Maybe more than one.

You may be right, it sure doesn't seem like there is a consistent problem for all, nor a consistent fix for those with a problem. At one point I suspected a convergence of the oil rings and the EGR system in some mysterious way, but I know some with clean EGR systems and use Rotella who still have oil burning...so I don't know really.

Too bad the earlier 3.2Ls aren't an easy swap, my Trooper burns close to zero oil. I burned maybe 1/4 quart on the last Moab trip, that's around 3000 miles, wheeling and all. And yes that was with Mobil One 5W30.