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#4800608 - 06/29/18 12:52 PM Mystik JT8 15w40Mystik in Ram EcoDiesel
SavagePatch Offline


Registered: 05/06/15
Posts: 589
Loc: California
I just purchased three 2 gallon jugs of Mystik JT8 15w40 for $43 shipped. Going to use it in my 2015 Ram EcoDiesel next oil changed after our 4th of July camping trip. I'll run it my usual 5k interval (manual says 10k) and get a UOA done. Capacity os 10.5wts so this will get me two OC with a lottle extra for topping off. It'll have a few trips towing our Jay Flight Baja on it too. So far I've ran 5w30, 0w40, and 5w40. I'm wondering if the HTHS 4.3 will show any better wear but my main intent was a low cost oil change that should give the same results as a 5w40 synthetic.




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#4800660 - 06/29/18 01:40 PM Re: Mystik JT8 15w40Mystik in Ram EcoDiesel [Re: SavagePatch]
BrianF Offline


Registered: 02/25/15
Posts: 587
Loc: Sask, Canada
Should be a decen toil. I believe Mystik is rebadged Citgo.
_________________________
2006 Trailblazer LT. Castrol Edge with Fram Ultra.
2017 Ram 3500 SLT Megacab. Duron SHP 10w30 with Hastings LF608.
1993 GMC 1500. It has oil and still runs

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#4800664 - 06/29/18 01:49 PM Re: Mystik JT8 15w40Mystik in Ram EcoDiesel [Re: SavagePatch]
CT8 Offline


Registered: 10/09/14
Posts: 11219
Loc: Idaho
Unless it is freezing at startup. I would guess the 15w-40 will be as good or better than the 5W-40. But then I could be wrong.
_________________________
"Don't let your preconceived notions get in the way of facts."
Geoff Metcalf

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#4800672 - 06/29/18 01:57 PM Re: Mystik JT8 15w40Mystik in Ram EcoDiesel [Re: SavagePatch]
SavagePatch Offline


Registered: 05/06/15
Posts: 589
Loc: California
Btw... I had to call to get the HTHS viscosity (4.3) since it wasn't on the PDS which they readily provided but when I asked the ratio of Synthetic to Conventional in this bleand they told me that it was proprietary.

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#4801634 - 06/30/18 05:20 PM Re: Mystik JT8 15w40Mystik in Ram EcoDiesel [Re: SavagePatch]
BrocLuno Offline


Registered: 09/06/15
Posts: 5613
Loc: Kalifornia Kollective
In Cali unless you live in Susanville or Truckee (or similar high altitude) in winter you do not need a 5W for anything...

Folks been firing off cold on 15W-40 for about 40 years now. Works fine and is good protection.

JT8 is nice oil. Got a couple of jugs left (from clearance sale) and I use it where ever it'll work smile
_________________________
Formerly in marine engineering. In an earlier life I owned my own petroleum tank truck, and hauled for the majors and independent's.

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#4801740 - 06/30/18 08:12 PM Re: Mystik JT8 15w40Mystik in Ram EcoDiesel [Re: SavagePatch]
BrianF Offline


Registered: 02/25/15
Posts: 587
Loc: Sask, Canada
Ya don't over think the 15w40 conventional. Many, many people use it year round up here with no ill effects. If it gets cold, plug the vehicle in.
_________________________
2006 Trailblazer LT. Castrol Edge with Fram Ultra.
2017 Ram 3500 SLT Megacab. Duron SHP 10w30 with Hastings LF608.
1993 GMC 1500. It has oil and still runs

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#4813508 - 07/13/18 08:47 PM Re: Mystik JT8 15w40Mystik in Ram EcoDiesel [Re: SavagePatch]
SavagePatch Offline


Registered: 05/06/15
Posts: 589
Loc: California
So I ended up only receiving one 2 gallon jug of JT-8. I asked to return it and they said to keep it and they would refund my money since the listing was incorrect. Good customer service.

So then I only had 8qts out of my needed 10.5qts. I still wanted to do a run to compare so I bought a one gallon jug from O'Reilly. I filled my EcoDiesel with a blend of 8qts CK-4 JT-8 and 2.5qts CJ-4 JT-8 with a little left to top up with.

I'll do a UOA in 5k miles. In the meantime I sent off my sample of M1 TDT 5w40 to be analyzed. I'll post the results when I get thwm.

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