Semi or Full Synth Oil in a D24tic?

[Laney760]

What oil do other people use in a D24Tic? I'm tempted to go full fully synth, have read of one owner who has used this for 110 thou but have also read that it can 'leak' out of various places due to it's 'thinness', will need to buy my oil this week for my oil change, about to buy semi-synth (from Opioils, Redruth). Grateful for any feedback

[craig8661]

i used millers semi sythetic
had no leaks on the engine and the engine sounded better than ever
was going to use castrol magnetec but was way to expensive

[jpliddy]

i also use millers semei synthetic i have been useing millers diesel clean
but i am concerned about the price now about £60 for 5 litres i have run out but might go for it again.

[tfb]

The synthetic/semi question has been deabated before if I remember correctly.

Personaly I would use normal semi-synthetic. I've tried synthetic in another older car and then racket the engine made was unbelivable and oil pressure was almost no existant, it is simply too thin for an old engine. The other reason is cost, I can get 25 liltres of semi from Costco for less that the price of 4 litres of synthetic. When running on veg oil, I'm changing the oil every 2.5K miles which sometimes means every 2 weeks!.

If I had a nice rebuilt/blueprinted engine then I would consider using sythnetic, but not on an engine that has done 150K miles and no idea of the history for the 1st 120K miles.

Regards
TFB

[Laney760]

Thanks everyone, I'll go for the semi-synth. Opie oils at Redruth (opie-oils co uk) have some reductions at the moment and am ordering 8 litres of Silkolene XTR 10 40 semi-synth, including delivery £33.08 which seems a good price. Tescos had their own diesel semi-synth on offer recently, it obviously meets all the specs and requirements, could have got 8 litres for £24, however, I am no doubt being silly but just didn't fancy using a supermarket brand oil whatever it's specs

Interestingly, the following I've cut and pasted from the net explains why using an extra quart in these engines above the 7 litres helps with the problem of oil circulation in these engines due to the one really long run in the design, spoke to my mechanic about it but he's a bit worried about doing it in mine:

"Overfill Crankcase to Maintain Oil Pressure? [Tip from Brandon] I've had issues relating to delayed oil pressure while starting on hills or inclines due to the problem noted above and my fix is to overfill by 1 quart of oil and maintain this level. I know it's safe and I've proven this when I bench ran my engine after the rebuild. The turbo oil return was left open by mistake and the overfill by a quart never ran out onto the bench. There is 21mm of clearance from the bottom of the crankshaft at its lowest point to the level of the oil return hole and peeking in with a flashlight and small mirror shows almost 2 inches of clearance from the crankshaft to the level surface of the oil. To hit the crank with oil you need to overfill by 2 1/4 quarts."

[tfb]

I'll use cheap supermarket oil as a flushing oil when I get a new car. I drain and fill with cheap supermarket oil, run it for a day or two and then put decent oil in it.

Regards
TFB

[111]

Try these, If you book or take a printed quote in it's £37 for the best stuff

http://www.national.co.uk/order_oil.asp

http://www.national.co.uk/basket.asp

I wouldn't get anything else from them due to the price but these deals look good to me, no max engine size either.:thumbs_up:

[Laney760]

Try these, If you book or take a printed quote in it's £37 for the best stuff

http://www.national.co.uk/order_oil.asp

http://www.national.co.uk/basket.asp

I wouldn't get anything else from them due to the price but these deals look good to me, no max engine size either.:thumbs_up:



Thanks for that, it's a good deal but I've already booked into a VW diesel specialist for my oil (+ flush) filter change plus other stuff and already managed to source one of the big oil filters for the D24T, most suppliers sell you the small one, not so good, and I want to keep in with this mechanic, he's given me a lot of time for 'nothing' and has a great reputation. Still unsure whether I should have gone for full synth, some internet write ups on people who have always used it in a D24Tic and swear by it but lots of conflicting stuff too. Dunno if you've read all the right ups on Magnatec but it is apparently technically not really a semi-synth, it's a 'synthectically' produced oil, a rather overpriced oil according to a lot of people, lots of stuff about this if you google it. Good deal though, thanks

[DieselDoNicely]

Thanks for that, it's a good deal but I've already booked into a VW diesel specialist for my oil (+ flush) filter change plus other stuff and already managed to source one of the big oil filters for the D24T, most suppliers sell you the small one, not so good, and I want to keep in with this mechanic, he's given me a lot of time for 'nothing' and has a great reputation. Still unsure whether I should have gone for full synth, some internet write ups on people who have always used it in a D24Tic and swear by it but lots of conflicting stuff too. Dunno if you've read all the right ups on Magnatec but it is apparently technically not really a semi-synth, it's a 'synthectically' produced oil, a rather overpriced oil according to a lot of people, lots of stuff about this if you google it. Good deal though, thanks

I have never flushed, always used Shell Helix semi synthetic in my 850 tdi and now in my D5. Just the 850 uses 10/40.

[Laney760]

I have never flushed, always used Shell Helix semi synthetic in my 850 tdi and now in my D5. Just the 850 uses 10/40.

In the end I spent a bit more money, didn't go for the Silkolene but have bought ***h's Titan XTR high performance 10 40 semi-synth.

Tried editing this, the forum self-editing obviously thinks my oil has a rude name, lol.., can't take out the asterisks

[69dieselfreak]

i think im going to run shells rotella 15-40 do you guys think that would be ok or should i go with something different im just worried about the oil steavation issue i have th d24t

[Laney760]

i think im going to run shells rotella 15-40 do you guys think that would be ok or should i go with something different im just worried about the oil steavation issue i have th d24t


I've just done a quick bit of research and I'd be a bit wary. Apparently it has SIMILAR specifications to the ACEA but not the actual specifications you should go for in the D24T, was primarily designed for agricultural vehicles and has a very very high detergent level, being designed especially to reduce soot emissions and that it gets very dirty very quickly because of this (good it's doing it's job but you will have to change sooner). I have read of these very high level detergents in some oils causing damage to engine parts. It does come in normal and synth (but can't work out whether thats full or semi off the net). If it were me I would rather go for a cheap supermarket oil that did meet the right requirements if I were going for a cheaper oil. I've been running my Merc camper diesel on 15 40 from Aldis that I was getting for about £6 a gallon (stocked up) and which meets all the requirements and have never had a problem

Don't know if you read the thread I started on whether to put an extra litre in due to oil starvation and followed the thread to read up the techy stuff on this, I decided to go for it and have an extra litre in but that has to be your decision. You can get some really good deals on Ebay on oil, I regretted not buying 25 litres of high quality semi-synth to the right specifications on there for under £30, keeping my eyes open for more such deals.......

[69dieselfreak]

i havent been able to find the tech articles to read about rotella is all dinosaurs
i guess cheap oil and a really good filter will do the trick

[oman5]

after reading up on these engines I've decided to use fully synthetic in mine, although I'm a bit weary using it in something so old- given how thin the stuff is its likely to get burnt up quickly I'd have thought, and its expensive stuff. I'll see how it does.

[69dieselfreak]

well im going to run full syn if the damn car doesnt use to a bunch of oil like my ferd (ford f-250 6.9 diesel) because this car is going to be my daily driver

[Laney760]

Orman5 and 69dieselfreak, let me know how your engine gets on with the full synth a few months down the line please. I've had my semi-synth in plus an extra litre for a few weeks now, I'll let you know a couple of months down the line how my engine is doing.

For about a month before my change I was using oil, a fair bit but since my change I've used none. I don't know why this should be, perhaps if it was filthy and deteriorated it would burn up or perhaps if the filter was full of muck it would have this effect? Am I talking rubbish? Can anyone tell me why she's not burning it up since flush, oil and filter change? Many thanks

[69dieselfreak]

will do there good buddy

[oman5]

well so far I've done 1000 miles in mine on synth and the oil level's not dropped at all. does anyone know what the change interval is on these? 3000 miles or is it more on synth?

[jor]

You can do 15,000 oil changes on synthetic. If that sounds excessive change the lilter midway.
Not my opnion, but that of someone who has rebuilt 50 of these engines! Using synthetic he maintains they are good for 500k, with mineral they are toast at 150k.

jor

[69dieselfreak]

if i were running syn id only be running 7500 miles max theres my $0.02

[Weezy]

Synth will always be better than mineral but to use it just to extend the oil changes defeats the object as its all about keeping the engine going for the long haul . As Dieselfreak says 7500 miles max sounds about right

[oman5]

I reckon 6000 miles would be about right for me, then I can re-use the waste oil by putting it into my other car. its a ford sierra 2.3 diesel that gets through oil so quickly it doesnt matter what you put in.

[Weezy]

Change mine every 3k regardless.The reason being,(and there might be other factors involved) is that US cars frequently hit 200/250k miles easy because oil changes are every 3k.

[prm36]

They need to, cos their oil is carp, unlike european oil.