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#3442753 - 08/01/14 11:37 AM Re: How hot is too hot for EOT? [Re: Griz95]
SteveSRT8 Offline


Registered: 10/10/08
Posts: 17163
Loc: Sunny Florida
Wildly platform dependent but I once emailed Mobil about a track day where my car exceeded 300 degrees.

They said that was no problem. Engine is still going strong 8 years later...
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#3442768 - 08/01/14 11:44 AM Re: How hot is too hot for EOT? [Re: cowhorse01]
Griz95 Offline


Registered: 03/05/07
Posts: 159
Loc: Bremerton, WA
Originally Posted By: cowhorse01
I had this same question a few months back. You can check that thread out. Same engine, different year. Mine got to 235* while towing on a hot day. It was fine.

What I have heard form guys that race and use their diesels in heavy use situations, 265*-280* is getting too hot, but you should never see close to those temps. I was using Rotella 10w-30 and changed it to 15w-40 on the trip where I saw mine climb. It did bring my temps down about 5*, but nothing major. I wouldn't even worry about it....just keep on going. I am not even sure I would spend the money on a UOA unless you just want peace of mind at this point.

http://www.bobistheoilguy.com/forums/ubbthreads.php/topics/3327348/1

There is the other thread from back in March.


Thanks for the info Cowhorse01...interesting reading. One time during the trip the outside temps were 105 degrees and I was pulling the trailer up into the Siskiyous. Not an idea situation for towing. The EOT readed 225 at one point until the clutch fan kicked in and it brought it down a few degrees. I think I feel more comfortable now knowing what was said in your thread.

Griz95
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02 F250, 4X4, 4R100, 7.3L Diesel, 3.73, Edge CTS Digital Gage, Tymar 4" exhaust & HPX. IH Bellowed Up-Pipes.

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#3442963 - 08/01/14 03:06 PM Re: How hot is too hot for EOT? [Re: Griz95]
roadrunner1 Offline


Registered: 04/08/09
Posts: 1006
Loc: oh
The 7.3 was originally speced for 30 wt., you're not doing any damage running 10w-30 with the temps you've reported.

Personally I use 10w-30 in my 7.3 and 6.0, with outstanding UOA results, but if running a heavier oil makes you feel better go fro it, your 7.3 won't care.
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#3443134 - 08/01/14 05:59 PM Re: How hot is too hot for EOT? [Re: roadrunner1]
Griz95 Offline


Registered: 03/05/07
Posts: 159
Loc: Bremerton, WA
Originally Posted By: roadrunner1
The 7.3 was originally speced for 30 wt., you're not doing any damage running 10w-30 with the temps you've reported.

Personally I use 10w-30 in my 7.3 and 6.0, with outstanding UOA results, but if running a heavier oil makes you feel better go fro it, your 7.3 won't care.


I think I am going to send in an oil sample and see what the results tell me and go from there.

Griz95
_________________________
02 F250, 4X4, 4R100, 7.3L Diesel, 3.73, Edge CTS Digital Gage, Tymar 4" exhaust & HPX. IH Bellowed Up-Pipes.

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