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Old 11-07-2018, 09:34 AM   #1
vipermanden
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Oil level in RAM Cummins Diesel engines

Curious question here. I have had my oil changed numerous times by 3 different RAM dealerships, and the oil level on the dipstick is confusing. I typically have them change the full synthetic oil in my Cummins 6.7 HO turbo Diesel motor every 5,000 miles because I am mostly pulling my Montana. But look at the two pics, and the oil level is "Always" past the safe area on the dipstick and goes to the next bulge in the dipstick, about 3/8' past the safe area. No comments from the peanut gallery, but is my dipstick too long? Are they just pumping in a recommended number of quarts?, or is this where the oil level should be? See the two pics.
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Old 11-07-2018, 10:33 AM   #2
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On my 2018 3500 Ram it is above the second bump.
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Old 11-07-2018, 10:39 AM   #3
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Some vehicles you don’t put the dipstick in all the way in especially if it is a screw in. You shove in as far as it will go in without screwing it in. I don’t know how the Cummings engine is but this should be in your owners manual.
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Old 11-07-2018, 10:40 AM   #4
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Wondering why they have the safe zone so far from the full position?
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Old 11-07-2018, 10:41 AM   #5
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There is no screw in on the dipstick. You just push it in and it clicks when it is in all the way.
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Old 11-07-2018, 10:50 AM   #6
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I am a member on turbo Diesel registry for Dodge Cummins owners. This question has been answered in their forums. The 12quart capacity is with a dry engine ie. no oil In galleys so if they are putting 12quarts in at oil change they are probably over filling slightly. Hope this clarifies the dip stick reading slightly over full
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Old 11-07-2018, 11:02 AM   #7
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I'm thinking the engine will have oil all thru it, because I am sure they don't let it drain for more than a minute before they start filling it? If everyone is driving around like this, and it does not bother the engine, then I am fine. I have put about 48,000 miles on my engine so far, so it must be all right?
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Old 11-07-2018, 11:06 AM   #8
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With a12quart sump capacity I’m sure it won’t hurt a thing
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Old 11-07-2018, 12:30 PM   #9
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My 2013 and my 2017 cummins, Synthetic oil is NOT recommended unless in extreme cold temp where the ambient temp is 20 deg or lower. The dealer will not put it in and says it can void warranty.


I know im going to get slack from that statement but it does say it in the owners manual.
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Old 11-07-2018, 01:10 PM   #10
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I had my oil changed at two different dealers. Both times it was over a gallon over full. The fill cap must be removed to drain oil, and it takes 30 minutes to drain. I drained mine into a 5 gallon bucket and it overflowed
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Old 11-07-2018, 01:48 PM   #11
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Originally Posted by K0LCB View Post
I had my oil changed at two different dealers. Both times it was over a gallon over full. The fill cap must be removed to drain oil, and it takes 30 minutes to drain. I drained mine into a 5 gallon bucket and it overflowed

You better find a different dealer! Holy crap!
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Old 11-07-2018, 02:29 PM   #12
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First time I changed my oil in the 09 I allowed it to drain well and then put in the 3 gallons. My dip stick looked just like yours. Every oil change since I put in 11 quarts and check. Always at the top of the safe zone. Cummins mechanic told me you never get all the oil out of them and keep doing what I'm doing. Has worked for 137K miles. Bonus is every fourth oil change you only have to buy 2 gallons.
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Old 11-07-2018, 03:11 PM   #13
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Originally Posted by K0LCB View Post
I had my oil changed at two different dealers. Both times it was over a gallon over full. The fill cap must be removed to drain oil, and it takes 30 minutes to drain. I drained mine into a 5 gallon bucket and it overflowed
I think this is quite common. I have a 2.7 F150 and you haft to let it set for 15 minutes to let the oil drain through the engine. People crawl under them take the plug out when it almost quits draining and stick the plug back in. Then they dump 6 quarts in and now its 2 quarts over full. This is just what happened to your Cummings.
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Old 11-07-2018, 05:06 PM   #14
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Originally Posted by vipermanden View Post
Curious question here. I have had my oil changed numerous times by 3 different RAM dealerships, and the oil level on the dipstick is confusing. I typically have them change the full synthetic oil in my Cummins 6.7 HO turbo Diesel motor every 5,000 miles because I am mostly pulling my Montana. But look at the two pics, and the oil level is "Always" past the safe area on the dipstick and goes to the next bulge in the dipstick, about 3/8' past the safe area. No comments from the peanut gallery, but is my dipstick too long? Are they just pumping in a recommended number of quarts?, or is this where the oil level should be? See the two pics.

This topic has been beaten to death on some of the diesel forums. I have a 2014 3500 Ram 6.7 Cummins .

I change my own oil, and have let it drain for a half hour, and have let it drain overnight. The level on the dipstick has always been right at , or no more then a 1/16" ,if that, over the second hump on the dipstick when the oil is changed , which to me is the full mark, the second hump . Anything in-between the two humps is okay. Whether being overfull is okay, it sound like its okay on your truck if in reality it is overfull .

Why some are get different readings is beyond me. I put back in 3 gallons ( 12 quarts ) Part of one one goes in the new filter before replacing, but always just the 3 gallons.

One member on a diesel forum went as far as only putting in 11*5/8 quarts because it showed slightly over the full mark.
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Old 11-07-2018, 05:13 PM   #15
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Eagleback, I have put full synthetic in every vehicle I have ever owned, including the Viper and two different diesel trucks etc. All of the big semis get twice or more life out of their engines using full synthetic. Three different dealers did not tell me I should not put full synthetic in my 2016 6.7 HO turbo diesel Cummins engine? Where and what does it say exactly in the manual about not using full synthetic oil? The full synthetic I use is made specifically for diesel engines and is the product that RAM stocks.
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Old 11-07-2018, 05:42 PM   #16
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Originally Posted by Eagleback View Post
My 2013 and my 2017 cummins, Synthetic oil is NOT recommended unless in extreme cold temp where the ambient temp is 20 deg or lower. The dealer will not put it in and says it can void warranty.


I know im going to get slack from that statement but it does say it in the owners manual.

Not in my manual ,nor the diesel supplement does it say what you are saying. What it does say is 5W-40 synthetic is recommended at below 0 degrees,
and 15W-40 above 0 degrees . Although 5W-40 can be run at the same temperatures above 0 degrees as the 15W-40 is ran at . In other words both can be run above 0 degrees , but only 5W-40 synthetic below 0 degrees .

The reason is cold weather starts at 0 or below.
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Old 11-07-2018, 05:47 PM   #17
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Eagleback, I have put full synthetic in every vehicle I have ever owned, including the Viper and two different diesel trucks etc. All of the big semis get twice or more life out of their engines using full synthetic. Three different dealers did not tell me I should not put full synthetic in my 2016 6.7 HO turbo diesel Cummins engine? Where and what does it say exactly in the manual about not using full synthetic oil? The full synthetic I use is made specifically for diesel engines and is the product that RAM stocks.

I won't engage you in dino oil and synthetic, but the issue here is cold weather starts, the synthetic if you will is thinner ,and flows better in extreme cold on startups, thats all its got to with what the manual is saying, if the engine was kept warm it wouldn't matter what oil is in there .
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Old 11-07-2018, 06:26 PM   #18
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Synthetic oil comes in a lot of high performance vehicles for a reason. It’s better oil. Do we need it is a different question. Most engines will wear out the rest of the truck but there is no question, it is better oil.
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Old 11-08-2018, 10:26 AM   #19
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I have a 2016 Ram 6.7 HO, Diesel supplement recommends the following word for word:
In ambient temperatures above 0F (-18C), we recommend you use SAE 15W-40 engine oil such as MOPAR, Shell Rotella and Shell Rimula that meets FCA Material Standard MS-10902 and the API CJ-4 engine oil category is required. Products meeting Cummins CES 20081 may also be used. The identification of these engine oils is typically located on the back of the oil container. In ambient temperatures below 0F (-18C), SAE 5W-40 we recommend you use synthetic engine oil such as MOPAR, Shell Rotella and Shell Rimula that meets FCA Material Standard MS-10902 and the API CJ-4 engine oil category is required.

I use the recommended Shell Rotella T6 no issues with that BUT i dont know why, but after I go about 7K on an oil change, i get a drip on my garage floor every once in a while, from the filter. I tighten it, it goes away, but might happen again. Never seem to see the level on the dip stick go down ...thoughts?
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Old 11-08-2018, 10:27 AM   #20
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page 276 of the Diesel Supplement.
I have the same engine
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