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What's the current view on 'diesel' oil?

Posted By: Damned67

What's the current view on 'diesel' oil? - 01/20/14 03:19 AM

Hi All,
My 505" is overdue for an oil change.
I recently bought a 5 gallon drum of Delo 400 for my diesel pick-up, and recall that some years ago, there was a lot of support for running diesel oil (Rotella, Delo etc) in engines with solid lifters due to a higher zinc content... if I remember correctly that is.

So, what's the current view on running 'diesel' oils in these engines?

(even though Delo is now sold as a 'mixed fleet' oil).

Cheers!
Posted By: dizuster

Re: What's the current view on 'diesel' oil? - 01/20/14 03:24 AM

It's not as good as dedicated race oil, but it's still better then the conventional off the shelf stuff.

Added wear package for flat tappet cams.

I always use it in my stuff.
Posted By: Twostick

Re: What's the current view on 'diesel' oil? - 01/20/14 03:29 AM

The zinc/phosphorus is still around 1200 ppm so unless you are running a flat tappet with roller cam spring pressures you should be good to go. I don't think 70's oil had any more than that.

Go check out Bob is the Oil Guy for everything you never knew about oil.

http://www.bobistheoilguy.com/

Kevin
Posted By: Grizzly

Re: What's the current view on 'diesel' oil? - 01/20/14 04:27 AM

I've been running it in everything that moves for 20 plus years. Mowers, ATV's, 17 cars and light trucks, Motorcycle, Class 8 truck, you name it.

A couple of years ago though they discontinued 5w30 diesel-spec so I have had to switch back to gasoline-spec for winter use. Summer I have been using the 10-30 and 15-40, whatever is sitting on the shelf in the shop. I have a high performance street bike and there is no screwing around there with the bike crowd: the goto oil is Rotella 15-40.

As far as any sort of racing/recreation application, let me put it to you this way: if diesel-spec oil is good enough to run in a 15 liter engine pulling 100,000 plus pounds up 10% grades in 100 degree heat for 250 hour change intervals it can handle a few seconds of 1/4 mile abuse.

As far as the percieved need for Zinc content I'd rather not comment on it, as I just simply find it irrelavant knowing what diesel-spec oil is subjected to from personal experience:

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Posted By: 451Mopar

Re: What's the current view on 'diesel' oil? - 01/20/14 06:56 AM

Last I read, they reduced many of the additives in the Diesel oil, but it still has way more anti-wear zinc/phosphates then regular oil. The Oil companies say they are using a better base stock for the new Diesel oil and that is a reason it costs more than it used to?
Posted By: SLOW67

Re: What's the current view on 'diesel' oil? - 01/20/14 07:12 AM

Quote:

I've been running it in everything that moves for 20 plus years. Mowers, ATV's, 17 cars and light trucks, Motorcycle, Class 8 truck, you name it.

A couple of years ago though they discontinued 5w30 diesel-spec so I have had to switch back to gasoline-spec for winter use. Summer I have been using the 10-30 and 15-40, whatever is sitting on the shelf in the shop. I have a high performance street bike and there is no screwing around there with the bike crowd: the goto oil is Rotella 15-40.

As far as any sort of racing/recreation application, let me put it to you this way: if diesel-spec oil is good enough to run in a 15 liter engine pulling 100,000 plus pounds up 10% grades in 100 degree heat for 250 hour change intervals it can handle a few seconds of 1/4 mile abuse.

As far as the percieved need for Zinc content I'd rather not comment on it, as I just simply find it irrelavant knowing what diesel-spec oil is subjected to from personal experience:



I agree, I run diesel oil in everything I own. My uncle got me started on it when I bought my first car. He used to build short track engines for several local guys and always ran 15-40 diesel oil in them and never had a failure. He said you could tear one down and it was as clean as the day you put it together
Posted By: 1967dartgt

Re: What's the current view on 'diesel' oil? - 01/20/14 02:48 PM

they have reduced the zinc for the dpf and cats that they run on new diesels. They have emissions on them just like a gas motor so it was necessary. I personally run race oil.
Posted By: Hemi_Joel

Re: What's the current view on 'diesel' oil? - 01/20/14 09:24 PM

Quote:

I've been running it in everything that moves for 20 plus years. Mowers, ATV's, 17 cars and light trucks, Motorcycle, Class 8 truck, you name it.

A couple of years ago though they discontinued 5w30 diesel-spec so I have had to switch back to gasoline-spec for winter use. Summer I have been using the 10-30 and 15-40, whatever is sitting on the shelf in the shop. I have a high performance street bike and there is no screwing around there with the bike crowd: the goto oil is Rotella 15-40.

As far as any sort of racing/recreation application, let me put it to you this way: if diesel-spec oil is good enough to run in a 15 liter engine pulling 100,000 plus pounds up 10% grades in 100 degree heat for 250 hour change intervals it can handle a few seconds of 1/4 mile abuse.

As far as the percieved need for Zinc content I'd rather not comment on it, as I just simply find it irrelavant knowing what diesel-spec oil is subjected to from personal experience:



Diesel oil is designed for engines that go down the road at under 3000 RPM. What effect will that have on an 8000 rpm race engine? Will it have sufficient anti-foam qualitys? Has it been tested in high RPM applications?
Posted By: Chris2581

Re: What's the current view on 'diesel' oil? - 01/20/14 11:30 PM

I'm using it in my 2002 Ram and my son's Jeep,and in the race car too.I use either Rotella or Mobil Delvac.Ram has 188K on it,Jeep has 175K,and no problems in the race car.
Posted By: ademon

Re: What's the current view on 'diesel' oil? - 01/20/14 11:41 PM

Quote:

Quote:

I've been running it in everything that moves for 20 plus years. Mowers, ATV's, 17 cars and light trucks, Motorcycle, Class 8 truck, you name it.

A couple of years ago though they discontinued 5w30 diesel-spec so I have had to switch back to gasoline-spec for winter use. Summer I have been using the 10-30 and 15-40, whatever is sitting on the shelf in the shop. I have a high performance street bike and there is no screwing around there with the bike crowd: the goto oil is Rotella 15-40.

As far as any sort of racing/recreation application, let me put it to you this way: if diesel-spec oil is good enough to run in a 15 liter engine pulling 100,000 plus pounds up 10% grades in 100 degree heat for 250 hour change intervals it can handle a few seconds of 1/4 mile abuse.

As far as the percieved need for Zinc content I'd rather not comment on it, as I just simply find it irrelavant knowing what diesel-spec oil is subjected to from personal experience:



Diesel oil is designed for engines that go down the road at under 3000 RPM. What effect will that have on an 8000 rpm race engine? Will it have sufficient anti-foam qualitys? Has it been tested in high RPM applications?

most diesel I see is specked for everything turbos included.
Posted By: Damned67

Re: What's the current view on 'diesel' oil? - 01/21/14 01:46 AM

From the Delo PDS:
"Delo 400 LE SAE 15W-40 is a mixed fleet motor oil recommended for naturally aspirated and turbocharged four-stroke diesel engines and four-stroke gasoline
engines in which the API CJ-4 service category and
SAE 15W-40 viscosity grade are recommended."

I don't think there's much question that a dedicated race oil would be better, but my car is mainly there to stop the garage slab from flying away, and I currently have a drum of Delo 400...
Basically just wanted to see what the current thoughts were in the diesel oil (as ideas/theories often change as time progresses).

Cheers!
Posted By: Grizzly

Re: What's the current view on 'diesel' oil? - 01/21/14 02:42 AM

Quote:


Diesel oil is designed for engines that go down the road at under 3000 RPM. What effect will that have on an 8000 rpm race engine? Will it have sufficient anti-foam qualitys? Has it been tested in high RPM applications?



Joel, the motorcycle that I mentioned is my Aprilia 750 and I can wind it out well past 8000rpm and the 600cc guys are 12,000 plus. Like I said the bike crowd is really behind the diesel-spec oil and a very high percentage of them are using it.

Put another way, yours and my special friend "winter fuel" is a cute game the blenders get to play on us with gasoline engines because the tolerances in a gas engine are pretty wide. Same goes for gasoline-spec engine oil: they can fart around with it and throw whatever is in the bottom of the barrell into a jug of oil. The tolerances in a diesel engine are more like a Swiss watch and the blenders can't fuss around when it comes to diesel-spec oil or fuel.

100 Low Lead and Diesel-spec oil: I bet my last dollar on both.

If you do decide to try it just stick with something like Mobil or Shell; none of that royal purple, amsoil, pennsoil or the rest of them fly-by-night companies.

Hope that helps.

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Posted By: Jeremiah

Re: What's the current view on 'diesel' oil? - 01/21/14 04:00 AM

I am not an expert just a Chrysler product abuser for most of my life so take this with a grain of salt. I have tried all kinds of oil from used redline out of my old employer's SCCA Trans Am race car to Wally Demarto 5-w30 to Kendall to Mobil 1 synthetic to the cheapest fleet brand they sell out here in ranching country.

I never have had an oil related failure.

This is all stuff that is kept below 7000ish rpm. Maybe 72-7300 depending on which tach you believe. With my new 511 I might get some ZDDP to add to the fleet oil and will definitely let it warm up to at least 120 before beating on it.

Again, take my experience with a grain of salt.
Posted By: 64hemi330sedan

Re: What's the current view on 'diesel' oil? - 01/21/14 06:32 AM

I have use rotella in my street car/n/ss car. the engine has over for hundred passes and a bunch of street miles on it.it has a racer brown 562 lift flat tappet cam.no valve train failures ever and only one set of rod bearings and valve springs on those passes and miles.the car is just as fast as it was when the engine was first installed. sound like a winner to me on this kinda combo.but my race engine im about to install in my 64 330 has a roller cam so it will get whatever the builder say to use.my guess royal purple.

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Posted By: 72Swinger

Re: What's the current view on 'diesel' oil? - 01/21/14 06:52 AM

Caterpiller still sells the good ole genuine CI-4 "off road" high ash content tree killing 15w40 that the EPA hates. If I still had my Cummins, that would be in it. This is the stuff we use to go 15K miles in a diesel with and not bat an eye.
Posted By: MR_P_BODY

Re: What's the current view on 'diesel' oil? - 01/21/14 07:29 AM

My race engines get GAS style oil... my diesel gets
DIESEL style oil... diesels dont turn 9000 rpm(I have
turned my race engine to 9600)... the thing with my
race engine is it starts at 5600 and goes up(never seeing
below that point) a diesel is a low rpm engine... they
both have a SAE standard but those standards are different...
if I were running a flat tappet at high rpm(7500 and
up) I would be running gas SAE oil with a zinc additive...
but on a FT I would be running a zinc additive no
matter how high OR low I turned it... that just me...
everyone has their choice
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