Magnatec Diesel Oil

Submitted: Saturday, Mar 24, 2007 at 17:28
ThreadID: 43594 Views:8352 Replies:9 FollowUps:3
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Hi all

The following might seem a bit airy-fairy but here goes..

I was once told that you should, if possible, stick to the same engine oil for the life of your engine (something about different properties of a "new" oil may cause interesting wear patterns upon changing) unless you have good reason to make a change (this might be hogwash but I'm a creature of habit anyway).

Anyway, I've been using Magnatec (standard variety) since day one on my 2002 TD Prado, but now the chaps at Castrol have brought out Magnatec Diesel...

Has anyone heard any reports on if its worth a try? It seems to be about 10% pricier than the regular Magnatec which I'm quite prepared to wear if it gives superior performance...or am I better off sticking with what I've used all along assuming the theory of using the same oil for life is a reasonable one?

Cheers and beers
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Reply By: MEMBER - Darian (SA) - Saturday, Mar 24, 2007 at 17:51

Saturday, Mar 24, 2007 at 17:51
I think the first bit is indeed likely to be the hogwash - most marketing of consumer goods these days is hogwash - but we suckers don't have the opportunity to test anything properly, so we pick a product and "run with it". I've been using Magnatec in the TD Jack for about 5 years. I need 10W-40 ..... far as I recall this new (alleged) product is 15W-40. The Jack is touchy on viscosity in cold weather - the 15W is going the wrong way for me.
AnswerID: 229482

Reply By: Member - Phil G (SA) - Saturday, Mar 24, 2007 at 18:32

Saturday, Mar 24, 2007 at 18:32
Magnatec Diesel: $36 for 5 litres of 15W40 dino oil has got to be marketing hype.
AnswerID: 229486

Reply By: Member - Bucky (VIC) - Saturday, Mar 24, 2007 at 18:38

Saturday, Mar 24, 2007 at 18:38
I have been informed by an Oil Company Chemist that Magnatec is full of gums, and that is what makes it stick to the upper motor.
Now I ain't no rocket scientist, but this scared me enuf to change after 2 oil changes,, I used a low ash flushing oil for 2000 km and it was black as
I now use Mobil Synth S 10 w 40 ,,,,

If you read the add by Chem, the additive company, it is " soot and glug ", that stuffs up the small diesel motors..

Hope you do not find this disturbing, but it shoould kick you into " inquisitive mode ", and please do your research.
I did mine

pls let me know what you did find

Cheers Mate
AnswerID: 229487

Follow Up By: Member - DOZER- Saturday, Mar 24, 2007 at 18:56

Saturday, Mar 24, 2007 at 18:56
A diesel mechanic told me the other day that if left over the alotted time period, magnacrap gums up the motor, Barinas gum up on any castrol oil for some reason...well known...
The problem you get with changing oils, is if you go from a low detergent to a high and it cleans out all the crap that the other has left to will either make or break a motor into using oil...
FollowupID: 490254

Follow Up By: oldpop - Saturday, Mar 24, 2007 at 21:06

Saturday, Mar 24, 2007 at 21:06
magnacr---p not bad nearly good enough for my wheel barrow wheel
FollowupID: 490275

Follow Up By: brett - Sunday, Mar 25, 2007 at 00:27

Sunday, Mar 25, 2007 at 00:27
If you believe the info on the Castrol website, which we should be able to, it shows that camshaft wear over 300 hours of running was significantly less than a normal oil. Now this should be a good thing, how it achieves this I have no idea.
To make a comment saying it is full of gums which makes it stick to parts seems a bit too non technical for my liking. What's a gum? It conjours up images of thick sticky stuff, I'm not sure it is that simple.
Interestingly I can find no information on their website regarding the Diesel Magnatec, it's been out for over 6 months now, you'd think they'd have something on there.
FollowupID: 490308

Reply By: Sacred Cow - Saturday, Mar 24, 2007 at 19:11

Saturday, Mar 24, 2007 at 19:11
Have you considered Mobil Delvac 1 a fully synthetic diesel engine oil?

AnswerID: 229491

Reply By: Russell from Synforce Lubricants - Saturday, Mar 24, 2007 at 20:56

Saturday, Mar 24, 2007 at 20:56
the important thing with japanese diesels is the jaso dh-1 (japanese diesel oil rating), many products on the market today have this rating, some don't though.

10w/40 or 15w/40 ... follow the vehicle manufacturesrs recomendations or if not sure, go with the 10w/40, it will be better in most instances anyway.

generally it is safe to change brands amongst the quality ones, but it is a good idea not to change from low ash (low detergency) to a higher ash (medium to higher detergency) if the vehicle has done a lot of k's.
AnswerID: 229511

Reply By: Battlecat - Sunday, Mar 25, 2007 at 06:22

Sunday, Mar 25, 2007 at 06:22
Yep it is total hogwash.

It all depends on what you are after. The thinner the oil the better the economy - performance etc but less protection. Thicker the oil the longer your engine will last. After running several high performance turbo cars and after a few turbo rebuilds I stopped running Mobil 1 as it was too thin - the spindle or shaft that joins the compressor and exhaust wheels needs a thicker oil to sit on so the shaft will not move as much. Just an example.

What I used to do I buy really expensive oil and use a secondary oil filter that filters down to one micron - the oil is always clean and as oil doesn't ware out you just replace the oil that you lost changing the filter.

All oils have an SAE and API etc etc ratings - choose the one that best suits you rig and budget
Check out this site
AnswerID: 229541

Reply By: Member - Bucky (VIC) - Sunday, Mar 25, 2007 at 06:48

Sunday, Mar 25, 2007 at 06:48
It certainly is not all hogwash !!!!!!!!!!

For your warranty, and for your car's sake,,,,,,go thru your engine specs. and use only an oil that matches all the specs the vehicle manufacturer describe.
Then go thru the oils themselves, agd get at least a semi synthetic.
You will not be too far out

Remember Cheap means cheap protection ,,,so choose cerefully
Cheers Mate

AnswerID: 229542

Reply By: RichieK - Monday, Mar 26, 2007 at 13:17

Monday, Mar 26, 2007 at 13:17
Thanks for the replies seems that most ppl regard Magnatec with a bit of contempt so I might look at changing, though synthetics may be a bit pricey or as one person suggested, just change the filter and keep using the same oil - actually, a mechanic at Ultratune suggested this once, claiming that a good oil will last for 2 years as long as you keep an eye on the level and change filters like clockwork..hmmmm...what to do....???

AnswerID: 229809

Reply By: Member - MrBitchi (QLD) - Tuesday, Mar 27, 2007 at 08:07

Tuesday, Mar 27, 2007 at 08:07
The secret is to make sure you use the best oil filter you can get. That, along with the best oil you can afford, is the best insurance for your engine.
AnswerID: 229960

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