Premature Diesel Oil Degredation?

[Leithfield]

Have recently had an interesting experience with Brand-X Diesel Oil in my 1KZTE ... typically run a synthetic, however, on last change a couple of months back was tempted by an 'Oil & Filter' combo featuring a major brand Diesel Oil. From the get-go I noticed a drop in oil pressure; not substantial, but ever so slowly decreasing further after each hard run. There was no corresponding change in oil level or efficiency of cooling system

Returning from the Waimak on Sunday, happened to glance @ the guage and observed it sitting @ the 1/4 mark @ 100kph (lowest reading yet). Once home I again checked the oil level - no probs ... but the oil on the dipstick had all the viscosity of H2O. Even when engine cooled, the viscosity was grossly atypical. Subsequently, drained the sump; nil evidence of any contaminant in oil, ash level unremarkable, nil coolant loss from radiator.

Replaced engine oil (other manufacturer, non-synthetic) & filter ... miraculous change in oil pressure recordings @ idle/highway speed, cold/hot

Anyone had a similar experience

[mike]

Yeah I'm experiencing that now. What brand are you using for things to run normal? I'm due for a change and want it right.

Mike

[Leithfield]

Shell Helix Diesel Super - working a treat for oil pressure in comparision to Brand-X.

[mike]

cheers for that, hope no damage has resulted from using the other stuff.

Mike

[wjw]

I was advised to use decent oil... have the details in my little red book... just not sure where that is....hmmmm

[Leithfield]

Interestingly enough Bill, Brand-X was a "decent oil" from a major oil company - 4 whatever reason, it was absolute shite in a 1KZTE :thumbdown: .

[Sanchez]

So do we get to know what brand 'X' actually is so we don't go out and buy it???... the suspense is killing me.

[mercutio]

i sent a PM to ask then we can't get done for slander or whatever it is

[Leithfield]

So do we get to know what brand 'X' actually is so we don't go out and buy it???... the suspense is killing me.

One of the principal reasons why I am reluctant to name "Brand-X" at present is because in fairness to the manufacturer there is an important variable I have not controlled for (when changing from synthetic to non-synthetic I did not use an oil "flush" product); there may have been a synthetic/non-synthetic chemical interaction which contributed to premature degradation. Further, I intend to have my oil pressure sensor professionally examined for any evidence of an intermittent fault.

This is why I have invited discussion of others experience ... if under multiple variables a familiar product/pattern is exposed, then there is "fair & reasonable cause for public disclosure" :thumright: .

[DJ]

why I am reluctant to name "Brand-X"

I hate to tell you this but the oil companies dont give a rats ar-e about you or me and what you think of their good or bad product. rember they put up fuel prices very quickly and lower?? the price very very slowly if at all. eg if a Arab has a bad day at the camel races, Shell, Texaco,or BP pushes the oil price up to help out the bookie. They are not concerned about little ole kiwis and if their product is shite. you and me are only a parasite on the flea crawling on the elephants gonades.. so who is brand X ... trust me they arn't watching

[Leithfield]

Yep, really going to 'publish and be damned' under that logic DJ :scratch: .

A salutory lesson was observed here in Canterbury not so many moons ago ... once upon a time, a couple of well known local 4wd figures let their fingers do the dissatisfied talking about a certain business ... this resulted in expensive legal action. It would not only be imprudent, but frankly bloody stupid to repeat that folly without benefit of an overwhelming pattern of evidence .

[DJ]

I guess you are right, I 'm loath to living in a self censoreship sociaty where "I know something but I cant tell you" is excepted. If you make a statement and its wrong, take the consequences! Its not about publish and be damed, its maybe if something is said then how can it be put right.? would you go into Repco and say that one of your products is not as good as it should be... but I can't tell you which one it is ! just maybe those people you refered to had not backed up their coments with fact. Now that I have mentioned oil company names. will I be in court? I dont think soo .. Using your logic. Land Rover and the corgie dog owners Inc.(?) should have sued me to death by now... Dont be scared ... or hows this 'Brand X is the best oil ever made, its so good I wouldnt use that other brandX ' stupid huh
this should start something

[Leithfield]

If you make a statement and its wrong, take the consequences! ... just maybe those people you refered to had not backed up their coments with fact".

And, its exactly "fact" I'm looking to first establish . If you want to be a martyr to the anti-reality cause DJ, thats your perogative; good luck with the pilgrimage .

[Smurf]

As I see it you don't have to slander the company with your comments.
Its no different to the discussions on here about tyres etc.
One person prefers a brand of tyre because they find it works well for them, another person thinks the same tyre isn't so good.
In my 2.4 Diesel surf I find I get good oil pressure using Valvoline Diesel Extra Oil. Used to use Caltex brand of oil, but oil pressure was quite a bit lower. This is just MY experience with oil in MY motor. Nothing slanderous just my experience.
I have had to use a semi synthetic oil as a top up on a trip where I holed my oil filter and found that after replacing the damaged filter (but not the oil) there was a drop in oil pressure. After changing the oil once we got home the pressure returned to normal.

[Leithfield]

Used to use Caltex brand of oil, but oil pressure was quite a bit lower. This is just MY experience with oil in MY motor.

Interesting experience with that brand Smurf

[NJV6]

Land Rover and the corgie dog owners Inc.

[DJ]

If you want to be a martyr to the anti-reality cause DJ, thats your perogative; good luck with the pilgrimage

Thank you my children this honour of being a martyr is humbling but I can not accept it as there is so much more to be done , saving virgins, walking on water, finding the holy grail of oil brand 'X'all that sort of thing, and I cant give up my day job just yet but Saint DJ of 4wding has a nice ring to it.

[SupraLux]

One of the principal reasons why I am reluctant to name "Brand-X" at present is because in fairness to the manufacturer there is an important variable I have not controlled for (when changing from synthetic to non-synthetic I did not use an oil "flush" product); there may have been a synthetic/non-synthetic chemical interaction which contributed to premature degradation.

Its generally accepted that you can't mix the two, and that the first change between them should be a short one to 'flush' the mix. I would think in fairness you should have replaced them with the same brand to check if it really was the oil before even posting this in the way you have, especially considering you've all but named them further in the post anyway.

And I'll deny vehemently in a court of law that brand 'X' has paid me millions to be a mole on this site

Steve

[Leithfield]

Its generally accepted that you can't mix the two, and that the first change between them should be a short one to 'flush' the mix. I would think in fairness you should have replaced them with the same brand to check if it really was the oil before even posting this in the way you have, especially considering you've all but named them further in the post anyway.
Steve

Thank-you Mr Pious :

[Leithfield]

Its generally accepted that you can't mix the two, and that the first change between them should be a short one to 'flush' the mix. I would think in fairness you should have replaced them with the same brand to check if it really was the oil before even posting this in the way you have
Steve

Ahhh but all is not as it would seem Grasshopper :
http://www.redlineoil.com/tech_faq.asp
Should I flush my engine or driveline before using Red Line’s synthetic lubricants?
A flush isn't necessary or advised, as Red Line’s products are compatible and will mix with other synthetics and petroleum products .

Yep, makes good economic sense to replace an oil you are dissatisfied with per the same product "to check if it really was the oil" - Would eat into the beer money to do that Steve

[Rangielux]

Pious - had to look that up

For other dumb buggers like me

pious adj. 1.devout; deeply religious 2.dutiful; reverential. 3.marked by sham or hypocritical virtue; sanctimonious.

[DieselBoy]

I have found the same.
I bought a 20L drum of Caltex Delo Gold (two oil changes in the TD42) and tried two different brands of oil filter, the Repco/Ryco filters and some other industrial filters.

I had low oil pressure with both brands of filter, so put it down to the oil. I tried some Moreys heavy duty oil stabiliser and it corrected the viscosioty a little. Idled at 20 psi prior to the addition.

I usually run Mobil Delvac MX (20L drum) and have good pressure, it builds up quickly on start up and sits at 25psi when idleing. Thats using my usual Repco/Ryco filter.