any one use 15w40 in your 2.8L?

painemann · **Joined:** Sat Dec 20, 2008 7:02 pm **Posts:** 607

I have a 5 gallons of it and want to use it, should i? thanks.

DarbyWalters · **Posted:** Sat Nov 28, 2009 1:45 pm

Are you talking about a synthetic 15W-40? Where are you located (outside temp wise)?

I use that weight here in South Texas...I don't need a 0W-40.

UFO · **Posted:** Sat Nov 28, 2009 1:53 pm

Never seen a 15W-40 that's synthetic. I would not use it.

grywlfbg · **Posted:** Sat Nov 28, 2009 2:22 pm

Mobil 1 comes in 15W-40. It's full synthetic.

Like Darby said, if you live somewhere hot you should be fine.

painemann · **Joined:** Sat Dec 20, 2008 7:02 pm **Posts:** 607

I have the Rottela T DINO stuff, and I live in MI and its almost winter.... maybe not a good idea.

DarbyWalters · **Posted:** Sat Nov 28, 2009 7:44 pm

Amsoil makes 2-3 versions of 15W-40 full synthetic and Royal Purple makes one also.

95BadBoy · **Posted:** Sat Nov 28, 2009 7:58 pm

painemann wrote:

I have the Rottela T DINO stuff, and I live in MI and its almost winter.... maybe not a good idea.

5-40 full synth would be a much better over there in Mich. DEF that it's not worth the risk of 15-40 and it being Dino. :shock:

jinstall · **Posted:** Sat Nov 28, 2009 8:12 pm

5W-40 Mobile 1 ESP from the Mercedes Benz dealer is where I get mine.

DarbyWalters · **Posted:** Sat Nov 28, 2009 9:13 pm

This is the Amsoil I trust most for my CRD...a high TBN (Total Base Number) to counteract any acidity...recommended for Diesels with a high EGR use. Even with the SEGR and GDE Hot Tune, I still trust it the most.

http://www.amsoil.com/storefront/ame.aspx

Tinman · **Joined:** Mon Apr 10, 2006 10:45 am **Posts:** 308

I wish someone could provide some data to prove it'd be OK to run dino15-40 in the libby. I would love to be able to do that. I am about to order about 30 gallons for my trucks and it'd be so nice to just have on oil in the garage. I just ordered some CAT DEO SYN 5-40 CI-4+ the other day for the libby. Hard to find and I still haven't got confirmation it's on it's way.

GreenDieselEngineering · **Joined:** Sun Jun 07, 2009 5:10 pm **Posts:** 1111

VM uses this engine on several applications in Europe and they recommend the following pertaining to 15W-40 engine oil:

- use a multi-viscousity oil
- full synthetic 0W-40 and 5W-40 are recommended for best fuel economy
- the lowest recommended ambient temp for 15W-40 is 14 F

The 0W-40 oil was recommended for the US KJ CRD in order to guarantee good startability down to -13 F.

If you are in the southern part of the US, the 15W-40 will work well.

DarbyWalters · **Posted:** Sat Nov 28, 2009 10:51 pm

In general:

5W is for temps below 0 F
(the "W" does not stand for weight but "winter" to signify winter temps)

10W is for temps down to 0 F

15W would be for temps down to 14 F

20W would be for temps down to 32 F

Our Jeep Liberty CRDs (2005-2006) require a CI 4+ (API) but of course can accept a CJ 4 (2007+). The CJ 4 is usually a DEO or DME...but I prefer the Amsoil AME (CI 4+) 15W-40 Heavy Duty Diesel and Marine Applications. If I lived in a colder climate, I would have to adjust it for the season change.

warp2diesel · **Posted:** Sat Nov 28, 2009 10:55 pm

I would not risk it. Engineers as a rule want to go for the cheapest option and they only go for the more expensive one when they have to. When Synthetic oil is put in in at the factory,it comes out of the Company Bottom Line and that money is no longer available for paychecks. Warranty claims also come out of the Company Bottom Line and that money is no longer available for paychecks. Since Engineers like the rest of us like their paychecks too, they have a vested interest in making the best move as long as the Cost Cutting Bean Counters don't stop them.
In my personal opinion since Chrysler was at the time and still a Super Tight @$$ company, they would not specify synthetic oil unless they had/have to.

I rest my case.

Use the Rotela Dyno in another engine or sell it.

nursecosmo · **Posted:** Sat Nov 28, 2009 11:59 pm

I can confirm that 5W40 Mobil one turbo diesel truck oil becomes so thick @ -30F, that the engine can barley turn over at all if not plugged in, and if it doesn't catch within 5 seconds or so, the battery goes kaput. Sometime this month I am changing over to 0-30 for the cold months, because my wife can't plug in at her overnight work.

BBB · **Posted:** Sun Nov 29, 2009 11:09 am

Here on the eastern seaboard we run 15w-40 dino year round in ALL of our diesels.

- Makes it easy to have one oil for multiple rides.
- Buying it in 5 gallon buckets does save you a few quarters.

Temps rarely drop below 17 F here in the Philly area and we always plug in below 40 F. Don't know if the VM engine warranty is dependent on proof of spec'd oil use. We're past that point anyway. If your concerned and you live where you can freeze your tongue to the flagpole daily

just save the 15W-40 for the summer.

Turbo Tim · **Posted:** Sun Nov 29, 2009 12:03 pm

It got down to a very chilly 55 degrees last night. Burrrrrrrr. Jeep has never been plugged in. Always starts.
I noticed that the temperature gauge is working now. In the summer when you first start it, the gauge is already almost to the "Normal" mark.

I wonder why so many come here to Phoenix in the winter......

nursecosmo · **Posted:** Sun Nov 29, 2009 1:17 pm

Turbo Tim wrote:

It got down to a very chilly 55 degrees last night. Burrrrrrrr. Jeep has never been plugged in. Always starts.
I noticed that the temperature gauge is working now. In the summer when you first start it, the gauge is already almost to the "Normal" mark.

I wonder why so many come here to Phoenix in the winter......

Yeah, rub it in. :cry:

We had our second good snow last night. The first was in the middle of October.

DarbyWalters · **Posted:** Sun Nov 29, 2009 2:01 pm

Wish it would snow in San Antonio...to use my Full Time 4WD. Back in 1983 I went skiing in Colorado (Steamboat Springs) driving my 1981 Mercury Linx. I purchased some tire chains to be safe and used them the whole way back. That year is snowed more than 12 inches overnight. All the way back from Steamboat, we were waiting to take off the chains. Imagine our surprise when I was still on them to my apartment in San Antonio. I was about the only one in town able to drive around carefree for the next three days.

yakers · **Posted:** Sun Nov 29, 2009 2:03 pm

One problem with dino oils is that they do not last as long. If I used a dino oil I would probably change it @3Kmi. So the cost works out about the same for synthetic @ 6K mi and thats not counting those folks who go 12.5K mi between changes (Does anyone do that?)

painemann · **Joined:** Sat Dec 20, 2008 7:02 pm **Posts:** 607

YEah, I used it seeing as it was all I had and it was over due for the change, but the oil was super black in color compared to my 7.3L F250 which is on the 15w40 DINO (it gets changed every 3kmiles). So seeing as it will be hard to start when it gets below freezing, and it will in a few weeks.. I will change it back to the moble 1 0-40, or maybe the Rotella T SYN 5w-40 http://www.ruralking.com/1-gal-synthetic-5w-40-oil.html

I like the change my diesel oil under 6k miles, the stuff just gets so darn black and dirty!

any one use 15w40 in your 2.8L?

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