Castrol HD40 diesel engine oil?
Alvin NG Boon Kim
I passed a oil supply chain yesterday and saw that they sell Castrol HD
(heavy duty) SAE 40 engine oil. On closer inspection, I realized the 4
gal pail says it's for diesel engines. It is rated at API SC/CD
I want to ask : How is the oil different from the ones used in petrol
engines? Can I use it in Smurfette? I'm currently using Mobil HD40 that
is rated at SD or SF.
My concern is that it's CHEAP! US$15 for a 4 gal pail. I can change oil
every 1000 miles! The Mobil costs me about US$53 for a similar quantity.
Question is, is the diesel oil safe to use? It's SAE 40 and rated SC/CD
Alvin.
Scatman
oil is SJ - BUT... API is AMERICAN Petroleum Institute, so I can't say if it
will have the same anti-wear additives and such.
My understanding is that diesel oils have a higher sulfur content than
automotive oil. Also consider that diesel engines don't rev very high and the
oil may break down from sustained high rpms.
Of course, I could be talking out my ass so don't take this information to be
correct.
Aaron Guinn - the "Scat(\/)an"
aguin...@aol.com ae...@technologist.com
"Zero to sixty? Sometimes..."
Scott Fraser
> Hello gang,
>
> I passed a oil supply chain yesterday and saw that they sell Castrol HD
> (heavy duty) SAE 40 engine oil. On closer inspection, I realized the 4
> gal pail says it's for diesel engines. It is rated at API SC/CD
>
> I want to ask : How is the oil different from the ones used in petrol
> engines? Can I use it in Smurfette? I'm currently using Mobil HD40 that
> is rated at SD or SF.
Alvin,
Over at API:
http://www.api.org/programs_services/quality/oilchart.htm
There is a nice chart.
SC is listed as: SC Obsolete For 1967 and older engines. (gasoline)
CD is listed as: CD Obsolete Introduced in 1955. For certain naturally
aspirated
and turbocharged engines. (diesel)
It looks like it has a rating for both gasoline and diesel engines. I'll
leave it to you to do the further investigation.
Scott
Alvin NG Boon Kim
Cool info....
Current 'car' rating is SJ, I know. 911s call for SJ. But Bugs? I recall someone
saying that back in 60s and 70s. The standard was SC and that was what Bugs
used..... Any truth?
Alvin.
Alvin NG Boon Kim
Alvin NG Boon Kim
Thanks for the info. It's informative, but I still have some issues I'm
unclear about..... It seem that S is for passenger cars and C is for
commercial vehicles. I know a Bug is a passenger car class, but does the
commercial oil give better protection? Expecially when the commerical
vehicles, eg taxis, van, trucks, are run for longer hours a day.
I tried to check the motor oil list to see if the oil I mentioned was listed.
It seems like it's not. Maybe the list is for America only? In Singapore you
still can find SD oil easily....
And yes, some oils have dual ratings, eg, Sx/Cx. So does it mean it can be
used in both passenger and commercial vehiceles, even when the label says for
diesel engines? Doh... I'm confused.
And last question..... The chart goes by the engine year.... My engine was
rebuilt 2 years ago. Does this mean it needs the lastest standards or what?
The Bug was designed circa the 1930s, does it mean that all catergories are
ok? :-)
Thanks Scott!
Alvin.
rcb78
http://www.johnmaherracing.co.uk/technotes_oil.htm
"Alvin NG Boon Kim" <alv...@worldwidewerkz.com> wrote in message
news:39863631...@worldwidewerkz.com...
> Hello gang,
>
> I passed a oil supply chain yesterday and saw that they sell Castrol HD
> (heavy duty) SAE 40 engine oil. On closer inspection, I realized the 4
> gal pail says it's for diesel engines. It is rated at API SC/CD
>
> I want to ask : How is the oil different from the ones used in petrol
> engines? Can I use it in Smurfette? I'm currently using Mobil HD40 that
> is rated at SD or SF.
>
aussiebug
1. HD doesn't stand for Heavy Duty - it stands for High Detergent -
which is a good thing in VWs since it means the oil holds the crud
better and will be drained off with each oil change rather than
building up inside the engine (no filter on most VW engines of course).
2. Unless the oil says quite specifically "suitable for both petrol
and light diesel vehicles" don't use it. "Heavy diesel" oil has
different additives which cope with burned diesel by-products, and they
allow higher concentrations of some oil components which are better
left out of petrol engine oils.
Petrol engine oil use S ratings (SG, SF etc) and diesels use C ratings
(CG etc). Some oils are dual purpose (for example "rated SG/CF" or
something like that - then it should also specify "suitable for petrol
and diesel engines"). If it doesn't have and S rating - don't use it.
The stuff you mentioned had an SC/CD rating so it MIGHT be suitable -
read the rest of the label. Those ratings indicate that it's "old"
oil - they are up to SG and about CF ratings now (the higher the second
letter the higher the oil's rating). That's probably why it's cheap -
left over stock. Those ratings are still OK for VWs as far as that
goes - they were designed to run on any decent brand oil - no special
requirements.
Stick with your Mobil engine oil if you are not sure. HD40 is fine for
your warm climate. Or you could use Castrol GTX (20w50) or any other
good brand 20w50 mineral oil - Valvoline, Havoline, BP, Shell etc.
Regards,
--
Rob, http://www.geocities.com/motorcity/lane/1970
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admin@loopback $LOGIN@localhost $LOGNAME@localhost $USER@localhost
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In article <39863631...@worldwidewerkz.com>,
Alvin NG Boon Kim <alv...@worldwidewerkz.com> wrote:
> Hello gang,
>
> I passed a oil supply chain yesterday and saw that they sell Castrol
HD
> (heavy duty) SAE 40 engine oil. On closer inspection, I realized the 4
> gal pail says it's for diesel engines. It is rated at API SC/CD
>
> I want to ask : How is the oil different from the ones used in petrol
> engines? Can I use it in Smurfette? I'm currently using Mobil HD40
that
> is rated at SD or SF.
>
> My concern is that it's CHEAP! US$15 for a 4 gal pail. I can change
oil
> every 1000 miles! The Mobil costs me about US$53 for a similar
quantity.
>
> Question is, is the diesel oil safe to use? It's SAE 40 and rated
SC/CD
>
> Alvin.
>
>
Sent via Deja.com http://www.deja.com/
Before you buy.
Alvin NG Boon Kim
Thanks for pulling out that link. Very good read!
Alvin.
rcb78 wrote:
> Check out this link, it may have some usefull info on the subject.
> http://www.johnmaherracing.co.uk/technotes_oil.htm
>
> "Alvin NG Boon Kim" <alv...@worldwidewerkz.com> wrote in message
> news:39863631...@worldwidewerkz.com...
Gary
written for John Maher, the leading bug race engine builder in the UK, by a
professional fuels chemist, so they should know what he's talking about.
http://www.johnmaherracing.co.uk/technotes_oil.htm
Gary
"Alvin NG Boon Kim" <alv...@worldwidewerkz.com> wrote in message > Hello
Mark Underwood
Alvin NG Boon Kim wrote:
> Hello Scott,
>
> Thanks for the info. It's informative, but I still have some issues I'm
> unclear about..... It seem that S is for passenger cars and C is for
> commercial vehicles. I know a Bug is a passenger car class, but does the
> commercial oil give better protection? Expecially when the commerical
> vehicles, eg taxis, van, trucks, are run for longer hours a day.
>
Actually, the S stands for "spark ignitied", as in gasoline engines, and the C
stands for "compression ignited" as in diesels. The second letters have
progressed up the alphabet as standards have changed over the years. So while in
older engines you can get away with an SC rated oil, your probably better off
with the newer SJ stuff in any engine. You can pretty much ignore the C rating
for gas engines.
-Mark