Green Dash Posted August 18, 2013 Share Posted August 18, 2013 We've had a problem with a few of the MP7's in our Pinnacles losing oil pressure and shutting down on long pulls. The shop says it faulty sensors but some of us know-it-all truck drivers think it may have something to do with using a lower viscosity oil.Does anyone know if 10W30 is acceptable in these engines? Most of these trucks run 24/5 doing pick up and delivery work during the day and running the road at night. It's not vocational work by any means but the trucks do get a pretty good daily workout. Quote Jim Link to comment https://www.bigmacktrucks.com/topic/32361-10w30-oil-in-an-mp7/ Share on other sites More sharing options...
b61mack Posted August 18, 2013 Share Posted August 18, 2013 We've had a problem with a few of the MP7's in our Pinnacles losing oil pressure and shutting down on long pulls. The shop says it faulty sensors but some of us know-it-all truck drivers think it may have something to do with using a lower viscosity oil.Does anyone know if 10W30 is acceptable in these engines? Most of these trucks run 24/5 doing pick up and delivery work during the day and running the road at night. It's not vocational work by any means but the trucks do get a pretty good daily workout. Dump a gallon of Lucas in there see if that helps. Quote Link to comment https://www.bigmacktrucks.com/topic/32361-10w30-oil-in-an-mp7/#findComment-200341 Share on other sites More sharing options...
farmer52 Posted August 18, 2013 Share Posted August 18, 2013 10W-30 oil is approved in most engines. I doubt the oil is at fault. There is not much difference in viscosity compared to a 15W-40. The only issue could be the oil is shearing out of grade. Does it shutdown when the oil is new (few miles) versus close to an oil change (many miles)?If all your engines us the same oil and only a few shutdown...I would suspect a sensor or another issue but not the oil.Here is the Mack approved oil list...2013 02 Mack Approved Oil.pdf Quote Ken PRR Country and Charter member of the "Mack Pack" Link to comment https://www.bigmacktrucks.com/topic/32361-10w30-oil-in-an-mp7/#findComment-200342 Share on other sites More sharing options...
Challenger Posted August 18, 2013 Share Posted August 18, 2013 Try FSB 221-010. We've been completing this fsb on trucks with the same complaint with good success. Try it on one truck and see how it goes. I just got a Mac computer so hopefully my link works. Quote Link to comment https://www.bigmacktrucks.com/topic/32361-10w30-oil-in-an-mp7/#findComment-200383 Share on other sites More sharing options...
Challenger Posted August 18, 2013 Share Posted August 18, 2013 Well I guess my link didnt work. Either way try FSB 221-010. Maybe someone here can attach the file. Quote Link to comment https://www.bigmacktrucks.com/topic/32361-10w30-oil-in-an-mp7/#findComment-200384 Share on other sites More sharing options...
Green Dash Posted August 18, 2013 Author Share Posted August 18, 2013 I neglected to mention that these are company trucks and drivers are forbidden to add, remove, or change anything mechanical. Thanks for the tips, though.Ken, thanks for the link. I'll find out the brand since I see the 1030 is only approved for certain brands. The shutdowns seem to occur when oil is broken-in but far from being due for a change. I rarely drive a Pinnacle but it's happened to me twice. Pressure sensors have been changed on a few but not enough time has passed to confirm that the problem has been solved. Quote Jim Link to comment https://www.bigmacktrucks.com/topic/32361-10w30-oil-in-an-mp7/#findComment-200386 Share on other sites More sharing options...
Challenger Posted August 18, 2013 Share Posted August 18, 2013 Quote Link to comment https://www.bigmacktrucks.com/topic/32361-10w30-oil-in-an-mp7/#findComment-200387 Share on other sites More sharing options...
other dog Posted August 18, 2013 Share Posted August 18, 2013 . 2 Quote Producer of poorly photo-chopped pictures since 1999. Link to comment https://www.bigmacktrucks.com/topic/32361-10w30-oil-in-an-mp7/#findComment-200393 Share on other sites More sharing options...
Green Dash Posted August 18, 2013 Author Share Posted August 18, 2013 I did not see that coming. Quote Jim Link to comment https://www.bigmacktrucks.com/topic/32361-10w30-oil-in-an-mp7/#findComment-200400 Share on other sites More sharing options...
farmer52 Posted August 18, 2013 Share Posted August 18, 2013 .filel895.jpg Quote Ken PRR Country and Charter member of the "Mack Pack" Link to comment https://www.bigmacktrucks.com/topic/32361-10w30-oil-in-an-mp7/#findComment-200402 Share on other sites More sharing options...
fjh Posted August 19, 2013 Share Posted August 19, 2013 .filel895.jpg Quote Link to comment https://www.bigmacktrucks.com/topic/32361-10w30-oil-in-an-mp7/#findComment-200583 Share on other sites More sharing options...
Mackpro Posted August 19, 2013 Share Posted August 19, 2013 The 10W30 was factory fill for most 2010 + Mack MP engines, it was done for MPG reasons. But we were told if you ever changed to 15W40 , dont go back to 10W30. This was coming from a Mack engine guy at Hagerstown. Here is the Mack service bulletin on the oil pressure issue.PV729 -FSB221-010_M.pdf 1 Quote Link to comment https://www.bigmacktrucks.com/topic/32361-10w30-oil-in-an-mp7/#findComment-200605 Share on other sites More sharing options...
Green Dash Posted August 19, 2013 Author Share Posted August 19, 2013 The 10W30 was factory fill for most 2010 + Mack MP engines, it was done for MPG reasons. But we were told if you ever changed to 15W40 , dont go back to 10W30. This was coming from a Mack engine guy at Hagerstown. Here is the Mack service bulletin on the oil pressure issue.Thanks! That's what I was looking for. As a driver it's sometimes difficult to get detailed info such as this, it all depends on who you ask. A few of us have had the engine shut down while on a long, steep incline on a poorly lit interstate. It's good to see that our shop is following factory recommendations and is also addressing the issue. We've had a few trucks in the shop for sensors but not enough time has passed to see if the problem was solved for the long term.Thanks again. Quote Jim Link to comment https://www.bigmacktrucks.com/topic/32361-10w30-oil-in-an-mp7/#findComment-200608 Share on other sites More sharing options...
farmer52 Posted August 19, 2013 Share Posted August 19, 2013 Why can't 10W-30 be used after 15W-40? Never heard of that before. Quote Ken PRR Country and Charter member of the "Mack Pack" Link to comment https://www.bigmacktrucks.com/topic/32361-10w30-oil-in-an-mp7/#findComment-200610 Share on other sites More sharing options...
Mackpro Posted August 19, 2013 Share Posted August 19, 2013 Why can't 10W-30 be used after 15W-40? Never heard of that before.He just said "dont do it , unless you like buying an engine". I really dont believe him, but I really dont want to find out that he's right! Quote Link to comment https://www.bigmacktrucks.com/topic/32361-10w30-oil-in-an-mp7/#findComment-200619 Share on other sites More sharing options...
farmer52 Posted August 19, 2013 Share Posted August 19, 2013 He just said "dont do it , unless you like buying an engine". I really dont believe him, but I really dont want to find out that he's right!Understand. I have a few engineer friends at Hagerstown. I will ask them. Quote Ken PRR Country and Charter member of the "Mack Pack" Link to comment https://www.bigmacktrucks.com/topic/32361-10w30-oil-in-an-mp7/#findComment-200620 Share on other sites More sharing options...
j hancock Posted August 19, 2013 Share Posted August 19, 2013 Understand. I have a few engineer friends at Hagerstown. I will ask them.It will be interesting to hear what they have to say. Quote JimIt doesn't cost anything to pay attention. Link to comment https://www.bigmacktrucks.com/topic/32361-10w30-oil-in-an-mp7/#findComment-200651 Share on other sites More sharing options...
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