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  1. #101
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    There seems to be a lot of very knowledgeable people following+commenting on this thread. I guess this is the best place for me to ask MY Series 60 questions....

    The 515hp version 14L Series 60 is the only engine I have any sort of "history" with. Been driving a 2007 Freightliner Columbia daycab what that engine for the last 2 years. It has about 425,000 miles on it now. Before that, it was a 425hp ISM Cummins in a 2005 International 8600 daycab. That thing ate Turbos and EGR valves almost every 6 months.

    The company I work for has about 15 trucks all with the 14L Series 60 in it. I see how these trucks all get "beat on." (Ryder trucks, 24,000+ mile services, different drivers all the time, "fleet quality" filters, etc...)
    And they just (for the most part) won't stop running!!!

    I'm toying with the idea of buying my own truck (used of course) and pretty much the only thing I'm looking at is a truck with the 515hp 14L Series 60...

    Here's MY questions...

    Would anyone else agree on the 100,000 - 120,000 mile valve adjust intervals that another poster mentioned? I was told by a friend (most trucks get their valves adjusted every 500,000 miles.) If so, how difficult is a Series 60 valve adjustment? (Personally, never worked on a diesel engine. but did plenty of "car" valve adjustments.)

    Will the Series 60 benefit from synthetic oil?

    Is a 10,000 mile oil change interval on a Series 60 considered overkill even for someone who likes to "go crazy" with preventative maintenance?

    What brand oil/air/fuel filters does everyone use on their Series 60's?
    Also, what brand/type of oil?

    Thanks Everyone!


  2. #102
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    I have changed the oil in my ser 60 at 10,000 miles for over 11 years & 1.4 mil miles. at 1.3 mill miles, had inframe done & could of went to 2 mill easy. I do not regret changing at 10,000 miles. but that's me. I use donaldson filters. I tried oem. detroit filters which cost a lot less than donaldson, but donaldson filters better, after 3 thousand mile, I can still see thru the oil on stick, but with detroit filters, it is already black as coal. same with the fuel filters. donaldson is lot better than oem.. I use delvac or rotella. which ever is on sale. plain ole dino oil. no synthetic.

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  4. #103
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    Doing a valve set is easy to do your self, and cheap if you get it done by someone that will take the time to do it evenly.
    Oil filters they were tested years ago, and with the advances in filter elements the cheap one are better than the expensive ones were years ago. The only filters I have seen in the last ten years to fail were Donaldson secondary fuel filters painted yellow. My personal list of the best is AC Delco, Fleetguard and Donaldson. I use Bosch or AC Delco in my Duramax.
    "Changing the oil, is the cheapest overhaul you will never need"
    I am a firm believer in the spinner filters, to get the fine particles out.

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  6. #104
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    Ok, I haven't gone through this whole thread. It probably has been asked before, or stated, but here it goes.

    What is the best operating range of these motors?

    This is how I currently drive.

    I run this motor between 1100 rpm and 1600 rpm.

    Hills, which are short, I'll run it near 1400 RPM.

    Now, before anyone jumps in here, I have always gotten the best MPG in this range than any other driver in the fleet. Our speed limit is 60 mph, so I run right at 61 or so.

    These a Penski lessors and have the 10 speed tranny.

    Also, we run heavy at times. We are licensed for 95,000lbs. We are most often breaking 80,000 each direction.

    Not sure which level of programming we have. These trucks were built in 06, and were turned down after the factory had their settings to run no faster than 62.

    So, what do you think?
    Last edited by amdriven2liv; 08.26.2011 at 05.52 PM. Reason:: More info.

  7. #105
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    if I run my engine below 1200 rpm's it is lugging the engine.

  8. #106
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    Quote Originally Posted by amdriven2liv View Post
    Ok, I haven't gone through this whole thread. It probably has been asked before, or stated, but here it goes.

    What is the best operating range of these motors?

    This is how I currently drive.

    I run this motor between 1100 rpm and 1600 rpm.

    Hills, which are short, I'll run it near 1400 RPM.

    Now, before anyone jumps in here, I have always gotten the best MPG in this range than any other driver in the fleet. Our speed limit is 60 mph, so I run right at 61 or so.

    These a Penski lessors and have the 10 speed tranny.

    Also, we run heavy at times. We are licensed for 95,000lbs. We are most often breaking 80,000 each direction.

    Not sure which level of programming we have. These trucks were built in 06, and were turned down after the factory had their settings to run no faster than 62.

    So, what do you think?
    Climb up on the drivers side steer tire next time you have the hood open. Check out the sticker on the valve cover. It'll tell you what horsepower you engine is rated at...

  9. #107
    Light Load Member Sparkz's Avatar
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    The sticker on the valve cover only tells the maximum horse power for the family the engine is. It doesn't tell you what HP file your engine is actually using.

    Detroit don't have a set time for S60 top tunes. They say to do one when you start to have a "performance issue", eg increased fuel consumption, not pulling as well etc. The exception is that you need to do one at 100,000km after head work.

  10. #108
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    Quote Originally Posted by Sparkz View Post
    The sticker on the valve cover only tells the maximum horse power for the family the engine is. It doesn't tell you what HP file your engine is actually using.
    My co-worker also drives a 07 Columbia w/ a 14L S-60, his sticker says 470. So what's up with that?

    If your statment was correct, all stickers on 14L S-60's would say 515, right?

  11. #109
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    The engine sticker says where it's set when it leaves the factory, there may be a label on the upper side of the passenger side sunvisor telling the hp and torque as well as transmission specs and rear axle ratio.

    The 14s lug and act much different than the 12.7s in my experience.

  12. #110
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    Most S60's have the HP that the engine came originally with.
    The most torque you have is at 1200 RPM and the torque and HP curve cross at 1550 on almost every class eight engine running an engine above 1700 to 1800 RPM is just building heat, and waisting fuel. If you are shifting up and it goes below 800 RPM, that is called progressive shifting. If you are cresting a hill and the motor goes below 1100, at full throttle, I would not worry. She can handle it!

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