Maximum Oil Temperatures?

[Steve S]

Basically his foot is a little to heavy.

 

[hunter10]

Quote:

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My neighbor has an '06 Ford Powerstroke & tows a 42' Toyhauler in the mountains of AZ.

He's running a conventional 15w40 motor oil & on his last trip, the engine oil hit 270 degrees & engine temp was on its highest level, per the guage.

He asked me if 270 degrees is more than the oil can handle.

What maximum temps. can conventional 15w40 handle? What about a fully synthetic?

Thanks for the recommendations.

Joe Fihn

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General rule of thumb for all oils. For every 20 degree increase in temp over operating temp the oxidation doubles therefore cutting the life of the oil in half. If your buddy is going to put his truck through that type of use he definitely needs to use a synthetic. If you are using a conventional oil that should last around 3k and the op temp goes up 20 degrees you only have 1500 miles left before the oil needs to be changed, and thats assuming the oil has just been changed, so theres a fresh 3k to be expected, and also assuming that the temp doesn't exceed 20 degrees higher than the op temp more than that once. Unless he's willing to change the oil every other week, i'd recommend a synthetic. I'd recommend a synthetic for all engines. Conventional motor oil basestocks have over 60 million chemical compounds, which means tons of impurities, which means tons of deposits, which means the detergent/dispersant package in your oil is being used very quickly to clean and disperse the deposits it caused, which means short life of the oil and more wear and tear on the engine. When it comes to engine oils, synthetics are the way to go.

 

[Flywest]

I'd say downunder we see a lot more heat consistently than much of the USA (Yeah I know death valley holds the hottest day record etc).
Facts are we don't get snow and commonly haul in ambients well above 100F day in and day out for 12 - 18 hours a day, with heavy loads.
I modded my 2004 f 250 7.3 psd, to include the usual transmission deep pan for 3 quarts extra trans fluid, as well as an after market oil cooler and filter.
In addition - I added 55 gals of freshwater in two stainless steel tanks (one in the bed and one underneath) which are plummed to a 12 v deckwash pump from a boat shop - to two garden misters (sprinklers) out front of the grill, which via a switch on the dash shoots water thru the 7 radiators out front of the engine on uphill grades.

I watch the EGT Pyro gauge, and when it's pulling 550C I know it's time for some water out front so the dashboard switch goes on.

I see the trans temps always stay below 70, and egt's never above 550, ---- I can feel the air conditioner drop 5 or 10 degrees when i hit that water switch and watch the egt's drop.

It works a treat - I can go thru 50 odd gallons of water over a 10 hour hauling day, non stop - just using the water for hill climbing when the egt's warrant it.

I get about 10 MPG hauling the approx 9000+ lbs of boat on tandem trailer @ 60mph.

Another advantage of onboard water is trailer tyre fires.

Should you haul on a blown tyre and not notice it to the point it ignited with heat - it can set your boat on fire.
While I carry a couple fire extinguishers in the vehicle and a couple more in the boat - I also have a length of half inch hose behind the seat rigged with snaplock and nozzel, as long as my trailer. I have a snaplock plumbed to the rear bumper and can connect the hose - hit the cabin switch to the deckwash pump and if necessary hose down a tyre, thats self ingiting due to heat to the point it won't re-ignite using the on board water.

The extinguishers will control the tyre fire just long enough for me to get the water happening.

Its the water that, cools the tyre below re-ignition temps.

It's not just my own rig,I've used the water and hose before today to put out caravan and road train tyre fires at the roadside by just happening to be in the right spot at the right time.

Its a good safety feature to carry water in our desert country, just for survival reasons alone, but the fire reason is a second good reason and supplemental water cooling on long grades is also a benefit.

My kids use the water & hose to wash down after diving at the beach to keep sand outta the vehicle and salt off their scuba gear, I also plumbed the boat trailer with it's own irrigation system so I can freshwater wash down the trailer after launching in the ocean before parking it up with the flick of the dash switch.

I don't know why more folks don't add a few water tanks to their trucks...I carry at least 67 gallons of diesel, 55 gals of water on every trip.

Beats me why more folks don't - probably never lived in the desert I guess.

Waters the elixir of life - like amex gold never leave home without it!

Waters probably part of the answer to your neighbors haulage problem but bye the sounds of it you just can't help some folks who don't want to know.

Cheers!

 

[Curious Kid]

Wow.

 

[Chris142]

The 6.0 has an electrically operated fan clutch. Often the wires get into the fan and get cut........No more fan clutch. Check this asap.

Make sure that you can hear the fan engage when it starts to get warm.