Nulon 5-40 diesel oil

[genpk]

I see Nulon are now making 5w-40 Apex specific diesel oil which has a Ck-4 rating which meets the low ash requirements of Jeep but its a semi synthetic oil.
Wondering if anyone has used it, thoughts on it being semi synthetic etc ?

[OLMATE]

If it meets all required specs, I would certainly use it, Semi Syn is fine by me, Just my 2 bobs worth

[drover]

Originally Posted by genpk

I see Nulon are now making 5w-40 Apex specific diesel oil which has a Ck-4 rating which meets the low ash requirements of Jeep but its a semi synthetic oil.
Wondering if anyone has used it, thoughts on it being semi synthetic etc ?

The Apex+ 5W40 diesel is C3 and full syn, its the 10W40 semi syn thats CK4 which I will be using next service...... no dramas with semi syn with me as its in spec, I went to the 10W 40 as its probably more suitable as I tow a lot, its API CK4/ACEA E9 .... I'm using the previous brew at present Nulon 10W40 full syn Diesel HD, a CK4/E9 brew, it seems when they went to the Apex+ it turned into a semi syn............. the old stuff will come up in a search but its all out of stock now.

[genpk]

When we had the intake manifold off in my 2015 with only 58k on the clock i was surprised how much carbon was in there.
I guess the car had only ever gone to the shops locally and i saw it had done a couple of country trips on the navigation info so obviously the carbon builds up.
You would think that you would want to clean them out about every 60k i would think. There must be a way of cleaning that thing without pulling the car to bits?

[drover]

The carbon is a lovely mix of oil sump fumes and soot from exhaust, catch can will remove a percentage of the oil from sump but you will still get the black crud forming, highly illegal but venting the sump gas to outside means the whole manifold is just dry soot, an EGR delete is the only sure fire way but that does give other problems if not done properly ............. BUT you can also lessen the amount of soot by getting the engine up to temp quickly, no idling or engine labouring, I do think if the manifold is cleaned up of the hard stuff along with the EGR defusser cleaned of soot then a regular use of a cleaner dumped down the spout would clear away the soot and oil residue before it hardened and wouldn't give the DPF any drama but driving style/use plays a big part on how it all works.... Its a problem with all CRD's so not just a Jeep thing..

With the WG, the Merc engine just needed about $4 spent on a couple of resistors and a diode, bit of wire and bingo the EGR was shut down and the ECU thought it was still working and with the catch can fitted I just had some upper cylinder lube, no sooty sludge in the system.. sadly no one has managed to be techo enough to do similar to the VM.................... I think on these and other engines extra sensor data from other sources has put an end to the quick fix, hence the rewrite of ECU... far to expensive an option.

[genpk]

Originally Posted by drover

The carbon is a lovely mix of oil sump fumes and soot from exhaust, catch can will remove a percentage of the oil from sump but you will still get the black crud forming, highly illegal but venting the sump gas to outside means the whole manifold is just dry soot, an EGR delete is the only sure fire way but that does give other problems if not done properly ............. BUT you can also lessen the amount of soot by getting the engine up to temp quickly, no idling or engine labouring, I do think if the manifold is cleaned up of the hard stuff along with the EGR defusser cleaned of soot then a regular use of a cleaner dumped down the spout would clear away the soot and oil residue before it hardened and wouldn't give the DPF any drama but driving style/use plays a big part on how it all works.... Its a problem with all CRD's so not just a Jeep thing..

With the WG, the Merc engine just needed about $4 spent on a couple of resistors and a diode, bit of wire and bingo the EGR was shut down and the ECU thought it was still working and with the catch can fitted I just had some upper cylinder lube, no sooty sludge in the system.. sadly no one has managed to be techo enough to do similar to the VM.................... I think on these and other engines extra sensor data from other sources has put an end to the quick fix, hence the rewrite of ECU... far to expensive an option.

Last quote i got was about $2k for a delete.
As your aware, its the thickness of the crud when it builds up in there.
I had to scrape the stuff out and then use a brush with degreaser.
Crappy job. Was looking at that Liquid Molly cleaner with the long tube as a possibility but unless you did it regularly it may not work.

[OLMATE]

You and me both, I had exactly the same thoughts until I was advised, sure it would clean the soft gooey stuff out, but all that stuff would end up downstream caught up in the DPF, blocking the crap out of it and baking the inlet of it solid once exhaust flames roasted it, In comparison similar to a vacuum cleaner bag after sucking up Gyprock dust I was informed