Towing my DRV up and past Vail ,CO. on I70 east my oil temp hit 260 degrees, transmission never went over 209 degrees. How hot can the oil get. Whats the best oil for heavy towing.2016 f350 dually

I run full synthetic, Rotella T6, but there are quite a few brands to choose from. I would get the fan checked on your truck, as it should have kicked on around 245 degrees.

What you should do is call the oil manufactures and talk to their engineers.The Nodwell track rig that appears in my tag line below has a 453 Detroit in it that gets very hot when traveling through miles of mud up to the front bumper. I have a separate oil temperature gauge on it.I called and talked to the Mobile 1 engineers. They said the engine oil could handle 250F without any problems, BUT if it went up to 290F for more than five minutes, that it would ruin the oil and it should be changed. This was several years ago, but again, call and talk to the mfg's engineers.Bill

were on flat land now. plan on getting oil changed in the next couple days. Be in one spot couple months looking into a after market oil cooler. TRAVELINGMAN I heard the fan kick in.

What RPM were you pulling? If you happen to be lugging the motor it will get hot. Best thing you could have done then is change gears and let the motor rev. Turn off your AC also to help reduce load. All motor oils are made to a certain standard so brand is kind of irrelivant. Your owners manual spells out the correct oil spec for your motor. It generally also gives grade recomendations for normal and extreme conditions. When summer towing fill to the extreme specs and go.

oil temp hit 260 degrees , whats the best synethic oil

TxGearhead
Explorer II
Jun 04, 2018
Mjfandal wrote:
Pick any of the major oil company full synthetic heavy duty oils. Pick correct viscosity for the ambient temperature your driving in. Shell, Exxon , Mobil, Chevron.. My opinion Mobil 1 oils along with Mobil 1 filters are the best. But I am also retired from Exxonmobil..

I agree with all that except the Mobil1.
But I retired from Shell. LOL
Mjfandal
Explorer
Jun 04, 2018
Your manual will have a viscioty chart.
Mjfandal
Explorer
Jun 04, 2018
Pick any of the major oil company full synthetic heavy duty oils. Pick correct viscosity for the ambient temperature your driving in. Shell, Exxon , Mobil, Chevron.. My opinion Mobil 1 oils along with Mobil 1 filters are the best. But I am also retired from Exxonmobil..
TxGearhead
Explorer II
Jun 04, 2018
theoldwizard1 wrote:
TxGearhead wrote:
10-30 may be approved, but my 2014 F350 diesel owners manual said to use 5w-40 for severe duty, which was defined as towing.

Motorcraft SAE 5W-40 Full Synthetic Diesel Motor Oil

You are NOT going to find this at your local Walmart !

TxGearhead wrote:
Might go to T6 5w-40 in the 2018.

According to Shell this does not meet the Ford WSS-M2C171-F1 specification.

I don't know where you would buy 5w-40 Motorcraft. My dealer didn't have any. I got the deer in the headlights look when I told them they might should read a Ford manual.
No worries now though, I progressed to a Cummins.
Hobo2
Explorer
Jun 03, 2018
I got caught behind a few semi's on the climb up to vail. 2nd gear 3000rpm, traffic was heavy on te climb. 50 degrees outside. rest area attop of climb said 10,400 feet elevation. i didn't think about turning auto air off. The whole rig is about 29500 lbs.Temp hit 260 degrees last half mile.
alexleblanc
Explorer
Jun 03, 2018
Back to the tow itself, what gear and rpm were you running? Roughly what speed?
FishOnOne
Nomad
Jun 02, 2018
theoldwizard1 wrote:
TxGearhead wrote:
10-30 may be approved, but my 2014 F350 diesel owners manual said to use 5w-40 for severe duty, which was defined as towing.

Motorcraft SAE 5W-40 Full Synthetic Diesel Motor Oil

You are NOT going to find this at your local Walmart !

TxGearhead wrote:
Might go to T6 5w-40 in the 2018.

According to Shell this does not meet the Ford WSS-M2C171-F1 specification.

Look at the link Travlingman posted for Ford approved oils to use. Shell Rotella T6 is now approved and I suspect Shell hasn't updated their website yet.

So yes you can go to Wal Mart and buy a Motorcraft filter and Shell T6 and have a very enjoyable oil change experience.

BTW... The only big oil company Ford hasn't approved is Delo since they choose to make their oil gas and diesel compatible by keeping zinc and phos. levels low. A big mistake IMO.
Puddles
Explorer
Jun 02, 2018
theoldwizard1 wrote:
Puddles wrote:
theoldwizard1 wrote:
Motorcraft Super Duty 10W-30 Diesel Engine Oil is sold at Walmart for under $20. It is API certified CK-4.

Even the old non-synthetic transmission fluid was good for over 250F.

Did you mean CJ4 ?

Nope. CK-4 is the "top of the heap" for diesel oil at the moment.

API Service Category CK-4 describes oils for use in high-speed four-stroke cycle diesel engines designed to meet 2017 model year on-highway and Tier 4 non-road exhaust emission standards as well as for previous model year diesel engines.
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API CK-4 oils exceed the performance criteria of API CJ-4, CI-4 with CI-4 PLUS, CI-4, and CH-4 and can effectively lubricate engines calling for those API Service Categories.

Thank you for the update... think I'll stick to API service category that the instruction manual states should be used in my diesel motor..
theoldwizard1
Explorer II
Jun 02, 2018
TxGearhead wrote:
10-30 may be approved, but my 2014 F350 diesel owners manual said to use 5w-40 for severe duty, which was defined as towing.

Motorcraft SAE 5W-40 Full Synthetic Diesel Motor Oil

You are NOT going to find this at your local Walmart !

TxGearhead wrote:
Might go to T6 5w-40 in the 2018.

According to Shell this does not meet the Ford WSS-M2C171-F1 specification.
theoldwizard1
Explorer II
Jun 02, 2018
Gearitis wrote:
Motorcraft 10w30 Diesel Oil synthetic blend is not CK-4 spec. And according to Ford and their official statement, do NOT use CK-4 in Powerstrokes, new or old as CJ-4 give better lubrication.

Clicky

Half correct, half incorrect.

The current Motorcraft diesel oils meet and EXCEED API CK-4 specifications so they can be used in other non-Ford engines that spec CK-4. Of course, they meet the Ford WSS-M2C171-F1 specification.