Using Thicker Oils During Hot Weather

[The Real Maverick]

Hybrid runs about 180-190°F on the highways at 70 MPH with gentle rolling hills. 185°F being about average.

Towing a high profile 3200 pound trailer up a 5% grade at 96°F ambient mine hit 215°F. For about 30 seconds then went back down.

Average while towing that big trailer- 195-198°F.

2022 stock cooling system

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[jb_cb900]

I see the Google AI symbol after each sentence in your response. Google AI is not an "expert" and has no idea who is. Nor does it give any idea of where that temp is being measured. I have seen so much incomplete and incorrect information from the AI responses, especially when technically related. On multiple occasions, I have found the exact, word-for-word, mis-information in a forum related to the same subject I was looking up. In those particular case, it was for bolt torque spec's on motorcycles.

 

[DrEvil]

Hybrid runs about 180-190°F on the highways at 70 MPH with gentle rolling hills. 185°F being about average.

Towing a high profile 3200 pound trailer up a 5% grade at 96°F ambient mine hit 215°F. For about 30 seconds then went back down.

Average while towing that big trailer- 195-198°F.

2022 stock cooling system

Wow the hybrid definitely runs cooler. No forced induction. No turbo to heat the oil. I can see that the 5/20 oil
Would be sufficient at those temperatures.

 

[Tbone289]

I did not know a scanner Was manufactured to be able to tell you When a thermostat opens. Being that it is a mechanical device. I've never seen a thermostat with an electronic monitoring system. Please correct me if I am wrong. My scanner only tells me when the fans come on.

If you watch coolant temperatures in cold weather on a scanner, you can very easily tell when a thermostat opens and closes. The temperature will oscillate at the set temperature.

Just because a thermostat opens at a set temperature, obviously doesn't mean that coolant won't reach higher temperatures.

 

[DrEvil]

I see the Google AI symbol after each sentence in your response. Google AI is not an "expert" and has no idea who is. Nor does it give any idea of where that temp is being measured. I have seen so much incomplete and incorrect information from the AI responses, especially when technically related. On multiple occasions, I have found the exact, word-for-word, mis-information in a forum related to the same subject I was looking up. In those particular case, it was for bolt torque spec's on motorcycles.

Then why does my scanner correlate to those temperatures. It's from Snap on and highly regarded as high quality.

 

[DrEvil]

If you watch coolant temperatures in cold weather, you can very easily tell when a thermostat opens and closes. The temperature will oscillate as it opens and closes.

The original post on this was regarding thicker oil in a high temperature environment. Not a cool environment. Is correct me if i'm wrong. That was This question Of discussion.

 

[Tbone289]

The original post on this was regarding thicker oil in a high temperature environment. Not a cool environment. Is correct me if i'm wrong. That was This question Of discussion.

No, the question of discussion is why you seem to think that today's engines have 210+ degree thermostats, and not in the 180-190 degree range. You made that specific point in your first post.

You asked how to tell when a thermostat opens with a scanner. I stated hat can be done in cold weather more easily. Cold weather, hot weather, it doesn't matter. The thermostat will open at the same temperature.

 

[DrEvil]

Okay I'll give you that. But what difference does it make when the thermostat opens if the fan doesn't turn on till 205 and 212 degrees. Thermostat means nothing. Fans cool the coolant not a thermostat. If the vehicle is not in motion there is no air flow over the radiator until a minimum of two hundred and five degrees. correct me if my thermodynamics are incorrect.

 

[Tbone289]

Thermostat means nothing.

I don't disagree with that, but why did you bring it up in your first post when talking about today's engine tolerances?

 

[CajunMick]

Umm, last 2 samples of Motorcraft 5-30 synblend revealed low viscosity. And no fuel in samples.

Just changed oil, and with summer coming, switched to MC full syn 5-30. Plan to put 1,500-2,500 miLes on it, hoping during hot summer time, do sample, see what viscosity is.

And samples revealed some shearing if the oil.

Some say shouldn’t be concerned. Shearing and low viscosity. IDK!

 

[DrEvil]

I don't disagree with that, but why did you bring it up in your first post when talking about today's engine tolerances?

Because the actual thermostat is the fan. It controls the temperature of the engine. Not The mechanical device. You can get stuck on the physical thermostat all you want. Now you're just being argumentative. I love this I litigate a courtroom all day not driving the amazon truck.

 

[DrEvil]

Back to work, Have a great day

 

[Tbone289]

Umm, last 2 samples of Motorcraft 5-30 synblend revealed low viscosity. And no fuel in samples.

Just changed oil, and with summer coming, switched to MC full syn 5-30. Plan to put 1,500-2,500 miLes on it, hoping during hot summer time, do sample, see what viscosity is.

And samples revealed some shearing if the oil.

Some say shouldn’t be concerned. Shearing and low viscosity. IDK!

All of the 2.0 Ecoboost UOA's I've seen show the same thing, including mine. I'm going to move up to a 5w-30 that is higher in the viscosity range on my next oil change to see if I can stay closer to the 5w-30 100 degree cSt range on my UOA results. Quaker State full synthetic is what I'll use most likely, as it has higher kinematic viscosity than Pennzoil Platinum or Mobil 1 and also carries Ford recommended spec.

 

[Snox801]

If you watch coolant temperatures in cold weather on a scanner, you can very easily tell when a thermostat opens and closes. The temperature will oscillate at the set temperature.

Just because a thermostat opens at a set temperature, obviously doesn't mean that coolant won't reach higher temperatures.

This is correct I can watch mine open with my scanner every morning. As soon as it opens the temp drops. Pretty cool to watch

 

[Bret Grabber]

This guy is the son of one of the many very smart people I had the pleasure of working with in my career. He is a genius when it comes to lubrication science. Entertaining to watch too. Here's his take on Thick Vs. Thin.
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