0w40 in 6.4L? Really?!

[SnakeEyes]

Went to the dealership to get a oil filter for my 15 wagon and I was told its 0w40 oil... So I checked the manual... 7qt of 0w40! I live in a small town and the only 0w40 oil I can find is heavy duty diesel oil and I don't wanna risk using that. Guess I'll be ordering oil from amsoil from now on... Kind of a piss off

[coder]

Went to the dealership to get a oil filter for my 15 wagon and I was told its 0w40 oil... So I checked the manual... 7qt of 0w40! I live in a small town and the only 0w40 oil I can find is heavy duty diesel oil and I don't wanna risk using that. Guess I'll be ordering oil from amsoil from now on... Kind of a piss off

Others make 0w40 Mobile 1, Castrol, and Pennzoil I would order it online from walmart, amazon, or similar if it was me. On another topic does the 6.4 require 91 octane gas I thought I read that online somewhere?

[SnakeEyes]

Gonna have to order some 0w40 royal purple then...
My manual says 87 ok 89-91 prefered

[SnakeEyes]

Now to make it even more of a piss off... I called royal purple, Mobil 1 and castrol regarding a 0w40 that meets all the specs of the manual say OR pennzoil ultra. NO OTHER oil meets the specs they have set for the 6.4 and other SRT motors...
I'm sorry but I'm callin BS how are they possibly gonna tell the different between Mobil 1 or pennzoil?!

[14PowerWaggy]

Went to the dealership to get a oil filter for my 15 wagon and I was told its 0w40 oil... So I checked the manual... 7qt of 0w40! I live in a small town and the only 0w40 oil I can find is heavy duty diesel oil and I don't wanna risk using that. Guess I'll be ordering oil from amsoil from now on... Kind of a piss off

Others make 0w40 Mobile 1, Castrol, and Pennzoil I would order it online from walmart, amazon, or similar if it was me. On another topic does the 6.4 require 91 octane gas I thought I read that online somewhere?

no, the manual specifically says to run 87 octane... 91 is not needed... I have run both in mine and cant tell any difference...

[loveracing1988]

Went to the dealership to get a oil filter for my 15 wagon and I was told its 0w40 oil... So I checked the manual... 7qt of 0w40! I live in a small town and the only 0w40 oil I can find is heavy duty diesel oil and I don't wanna risk using that. Guess I'll be ordering oil from amsoil from now on... Kind of a piss off

Others make 0w40 Mobile 1, Castrol, and Pennzoil I would order it online from walmart, amazon, or similar if it was me. On another topic does the 6.4 require 91 octane gas I thought I read that online somewhere?

no, the manual specifically says to run 87 octane... 91 is not needed... I have run both in mine and cant tell any difference...

This. Also I hate the fact that I have to be told to run one oil as well. But the difference in price between the oils is not much and the penzoil ultra is one of the best oils out there right now. I bought two cases of it on Amazon and a k&n filter and paid around $80. So I still have 5 quarts left over for the next change, and penzoil had a mail in rebate so I could get $10 back per case I bought, so it ended up being a good chunk under what the dealers charge.
If you buy 4 oil changes at a time from the dealer it comes out to about $65 per oil change though here.

[joeschmidt]

I had my oil changed 2 weeks ago at a local service place and after driving about 1000 mile, I noticed my tag in the window said 5w20. So last week I took it back and they showed me that the software program they have, says 7qts 5w20... I should them the owners manual, and they pulled it right it and changed everything at no charge. They used Mobil 1. I hope thier screw up didnt mess with anything. So far so good

[04Ram2500Hemi]

I had my oil changed 2 weeks ago at a local service place and after driving about 1000 mile, I noticed my tag in the window said 5w20. So last week I took it back and they showed me that the software program they have, says 7qts 5w20... I should them the owners manual, and they pulled it right it and changed everything at no charge. They used Mobil 1. I hope thier screw up didnt mess with anything. So far so good

Yikes! All I can say is keep every document related to the oil change in case a problem shows up to cover your ass. This is the one reason my dealer does all my services. That way if it's screwed up I have all the documents I need showing the service was done at the dealership. I'm on my 2nd HD Hemi and no issues yet with over 100,000 miles combined on both trucks.

[Mr.Smith]

Careful with RP, plenty of suppliers @ shops not using this anymore, due to top-end failures...

[verdesardog]

When taking your truck to the dealer make sure the front dive line cardan joint gets lubed. I took my truck for an oil change, the idiot kid lubed the carli ball joints which are not lubable on a stock truck but didn't even know about the cardan joint !
I will never trust the dealer again.

[leo72987]

Man I still have yet to lube that joint I better do it this spring have a feeling it has never been touched XD...

[SnakeEyes]

I ordered a large stock of amsoil 0w40. It meets the same spec that the Pennzoil does that the manual suggests and I can order it threw my peavey mart.
I had to go buya special grease fitting just so I can grease it! I went and asked the dealer about where it is and the service person said there isn't one... So went in back and asked the head mech and he showed me on a new driveshaft. What a PITA!

[stubiePW]

Yes it is a pain. I've seen where someone used a paint marker and marked it. Otherwise I jack the front end up and put it on jack stands so I can turn it

[verdesardog]

It's really not to bad, just get a needle attachment for your grease gun.

I would grease mine every oil change before getting free spin hubs.

The one on my 1994 Dakota failed twice in 270,000+ miles even when lubing every oil change.

[Big Blue]

Careful with RP, plenty of suppliers @ shops not using this anymore, due to top-end failures...

Any more detail on this? I've always been a huge fan of Royal Purple. A few years back the local 4 wheel shop did some pretty extensive testing of different oils and RP came out on top by a big margin, from a friction reduction perspective, and therefore ran way cooler. They did testing in trucks, cars, motorcycles and had a special friction producing device with a friction wheel. BTW Valvoline was least effective. And no I dont work for RP or any other oil company. I'd be interested to know if RP has changed somehow recently.

[Stickman]

I've used RP in my 5.7 for the last 2 oil changes and haven't had any problems. Actually just got my order of 7qts of RP 5-20 HPS and their filter last Friday for my 3rd oil change.

[old sole mopar]

Stick with 0w40 in the 6.4. I'm a mechanic and have worked on many diesel, gas, and natural gas engines. Wrong, cheap or just going to long for servicing will cost you grief. Mopar put piston cooling jets and hydraulic cam phasing in the 6.4. Cheaper or the wrong grade of oil will build up under the Pistons. That can seize the pin or starve it for oil. Cam phase is timing so that needs to be perfect! Oil to thick will erode the tolerances. So on and so forth. Oil is cheap!!!! Compared to the endless Possibilities.

[TwinStick]

They have been using 0-w-40 in Germany since i was there in the early 80's, driving tractor trailers. BMW, Mercedes, Volvo, Saab, Citroen, etc... Many European repair shops have been importing that stuff for years before it was avail here. Thin enough for very cold & thick enough for very hot. Best of both worlds. Good stuff.

On a side note Shell Rotella has been selling full synthetic 5-w-40 for years, for diesels. Diesels are hard on oil, yet they last longer. Maybe some wisdom there ? I used it for the first 90,000+ miles in our Toyota Corolla. No issues. Then it became hard to find around here for a while, so i ran different full synthetics. Now has 163,000 miles & still runs like a top. Rusting away though.

[14wagon86]

Just dumped the oil on mine. Thank goodness amsoil came out with 0-40w. That is all i run.

[adeluca73]

Just dumped the oil on mine. Thank goodness amsoil came out with 0-40w. That is all i run.

I'm a huge Amsoil fan too!!

[nts007]

I run shell rotella t t3 15-40 all summer and shell t6 0-40 all winter. Oil changes every 5000km on 15-40 and every 7500km on 0-40. Religious about it.

[Mr.Smith]

Careful with RP, plenty of suppliers @ shops not using this anymore, due to top-end failures...

Any more detail on this? I've always been a huge fan of Royal Purple. A few years back the local 4 wheel shop did some pretty extensive testing of different oils and RP came out on top by a big margin, from a friction reduction perspective, and therefore ran way cooler. They did testing in trucks, cars, motorcycles and had a special friction producing device with a friction wheel. BTW Valvoline was least effective. And no I dont work for RP or any other oil company. I'd be interested to know if RP has changed somehow recently.

Will not give any company names...just local shops seeing this after selling RP over time to customers. Use the right oil weight & your probably good. The main failures were not in the drivetrain(diffs/t-case/trans), but the engines valve-train components. More than a few sized valves guides as a result of wear/gumming up. Hell...every oil on the market has failure stories that go along with it. Not trying to scare you, just passing information on from local shops automotive, sleds, motorcycles, moto, etc. If it works for you...run it.

[jersey1880]

It's really not to bad, just get a needle attachment for your grease gun.

needle.jpg

I would grease mine every oil change before getting free spin hubs.

The one on my 1994 Dakota failed twice in 270,000+ miles even when lubing every oil change.

This is probably a really dumb question how exactly does the grease fitting on the front driveshaft work? I picked up a needle attachment this weekend and was able to locate the fitting on the driveshaft, but I could not get the grease in there for some reason. It would just squirt all over the outside of the fitting. Is it supposed to push in or anything like that?

[15wbpw]

You should be able to push the little ball in a bit and the grease should go in, it'll be messy either way

[Ducky's Dad]

You need a needle that is rigid enough for a pretty hard push. I got mine from Tractor Supply.