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Observation with Rislone #4839063
08/13/18 12:37 PM
08/13/18 12:37 PM
Joined: Aug 2017
Posts: 8
Virginia
MVFarms Offline OP
MVFarms  Offline OP
Joined: Aug 2017
Posts: 8
Virginia
My daily driver junker truck is a 1992 F150 with the 4.9 . . . Operating temp is always just under 210F (read on a mechanical gauge).

To try and quiet a lifter tick, I added a bottle of the Rislone concentrate to the Traveller 15w-40 that's in it, probably at about the middle of an OCI.

Truck was/is immediately running about 5 degrees cooler. Nothing else was changed.

I don't think it was any reduction in viscosity, as it ran the same temp on SN 10w-30.

Any thoughts?

Re: Observation with Rislone [Re: MVFarms] #4839081
08/13/18 01:00 PM
08/13/18 01:00 PM
Joined: Dec 2005
Posts: 10,157
Upper Midwest
kschachn Offline
kschachn  Offline
Joined: Dec 2005
Posts: 10,157
Upper Midwest
My first thought is that I'm surprised the thermostat isn't regulating it to the set temperature.


1994 BMW 530i, 234K
1996 Honda Accord, 264K
1999 Toyota Sienna, 404K
2000 Toyota ECHO, 279K
Re: Observation with Rislone [Re: kschachn] #4839084
08/13/18 01:04 PM
08/13/18 01:04 PM
Joined: Mar 2017
Posts: 633
West Ma.
rollinpete Offline
rollinpete  Offline
Joined: Mar 2017
Posts: 633
West Ma.
Originally Posted By: kschachn
My first thought is that I'm surprised the thermostat isn't regulating it to the set temperature.


True
It should still run the same temp.


Pete.
97 Ford Expl.Sport 4.0 ohv 4wd 5spddrive185k miles
Last Change;
50/50 QSUD, QSHM. 5w30
Fram xg8a, Fram CA8141

Currently under the influence of oil shocked2

Re: Observation with Rislone [Re: kschachn] #4839092
08/13/18 01:12 PM
08/13/18 01:12 PM
Joined: Nov 2006
Posts: 20,300
MA, Mittelfranken.de
Trav Offline
Trav  Offline
Joined: Nov 2006
Posts: 20,300
MA, Mittelfranken.de
Originally Posted By: kschachn
My first thought is that I'm surprised the thermostat isn't regulating it to the set temperature.


Only to some extent under ideal conditions. Example.. In stop and go bumper to bumper traffic on a hot summers day the fan(s) may not be bringing enough air across the radiator to extract the heat from the coolant as air coming through it at driving speeds. It can and many do eventually overheat.
The thermostat cant open more than fully.
A reduction in friction will reduce the amount of heat generated inside the engine and absorbed by the cooling jacket. Make sense?



ASE L1, Master. Deutsch Meisterbrief.
Re: Observation with Rislone [Re: MVFarms] #4839102
08/13/18 01:27 PM
08/13/18 01:27 PM
Joined: Aug 2017
Posts: 8
Virginia
MVFarms Offline OP
MVFarms  Offline OP
Joined: Aug 2017
Posts: 8
Virginia
I 'blame' the 210ish temps to an old/partially clogged radiator . . . but it's consistently run there for years.

I can watch the thermostat open and close (it's a 195F) but I'm not measuring temp at the thermostat housing . . . the bulb is basically in the water jacket between cylinders. Temps vary depending on where you're taking the measurement.

. . . example, assuming the thermostat is close to accurate at 195F . . . when coming up to temp, my gauge goes to 215 before the 195 thermostat opens and drops it back down. Water temp is a 'localized' measurement, not average. Thermostat housing is getting less heat generated and much more airflow than the side of the block.

Once you're consistently over 195 (which you should be for fuel efficiency) it's the radiator's job to regulate the temp.

I haven't worried too much about the temp. Just curious about the drop.

Re: Observation with Rislone [Re: Trav] #4839114
08/13/18 01:37 PM
08/13/18 01:37 PM
Joined: Dec 2005
Posts: 10,157
Upper Midwest
kschachn Offline
kschachn  Offline
Joined: Dec 2005
Posts: 10,157
Upper Midwest
Originally Posted By: Trav
Originally Posted By: kschachn
My first thought is that I'm surprised the thermostat isn't regulating it to the set temperature.

Only to some extent under ideal conditions. Example.. In stop and go bumper to bumper traffic on a hot summers day the fan(s) may not be bringing enough air across the radiator to extract the heat from the coolant as air coming through it at driving speeds. It can and many do eventually overheat.
The thermostat cant open more than fully.
A reduction in friction will reduce the amount of heat generated inside the engine and absorbed by the cooling jacket. Make sense?

The first one, yes. The second one no. In order for the second scenario to work and actually lower the temperature of the coolant would require him to magically be operating right at the heat load that just barely keeps the thermostat open. Otherwise the thermostat would just throttle down slightly and keep the same temperature. Overall heat rejection lower, OK I'll envision that. But not a lower temperature. That's controlled.


1994 BMW 530i, 234K
1996 Honda Accord, 264K
1999 Toyota Sienna, 404K
2000 Toyota ECHO, 279K
Re: Observation with Rislone [Re: kschachn] #4839143
08/13/18 02:03 PM
08/13/18 02:03 PM
Joined: Nov 2006
Posts: 20,300
MA, Mittelfranken.de
Trav Offline
Trav  Offline
Joined: Nov 2006
Posts: 20,300
MA, Mittelfranken.de
Right. As long as the engine was still controllable by the thermostat your right. If the thermostat was wide open and air movement was not drawing as much heat as being generated then a reduction in friction will reduce the temperature.
By how much I have no idea as most of the heat is from combustion being transferred to the cooling jacket.


ASE L1, Master. Deutsch Meisterbrief.
Re: Observation with Rislone [Re: MVFarms] #4839311
08/13/18 05:18 PM
08/13/18 05:18 PM
Joined: Jul 2005
Posts: 30,769
NY
demarpaint Offline
demarpaint  Offline
Joined: Jul 2005
Posts: 30,769
NY
I think the Rislone might have thinned the oil which in turn cooled the engine better than the 15W40 was.


God Bless Our Troops

Re: Observation with Rislone [Re: MVFarms] #4839328
08/13/18 05:41 PM
08/13/18 05:41 PM
Joined: Sep 2004
Posts: 7,670
Marshfield , MA
andyd Offline
andyd  Offline
Joined: Sep 2004
Posts: 7,670
Marshfield , MA
Crazy thought. 210 F is close to boiling. Is the cap any good? You may wanna try a thinner oil next change.


'16 Camry LE STP synth 0w20 and STP filter. the Fridge

1994 Ranger ,the Rat, 5w30 dino, STP filter

'16 Camry SE, Valvoline HM 0w20 and OEM filter
Thick oil is better grin2
Re: Observation with Rislone [Re: MVFarms] #4839380
08/13/18 06:42 PM
08/13/18 06:42 PM
Joined: Aug 2017
Posts: 8
Virginia
MVFarms Offline OP
MVFarms  Offline OP
Joined: Aug 2017
Posts: 8
Virginia
Cap is fine and thermostat is fine, both are about 1.5 years old . . . truck has run this oil and this temp for about 100,000 miles and ran the same temp with the predecessor rad cap and thermostat (that I changed out when I replaced the original water pump (at the 25 year mark).

Yes, 210F is close to boiling . . . with no glycol and no pressure.

The good cap and pressure are exactly what allows it to run just fine at 210.

210F is absolutely normal operating temp for the majority of 'modern' engines out there, dummy gauges have just made us forget that.


I don't think that it was the thinning of the oil that reduced the temps . . . truck ran the same temp with 10w-30.

Re: Observation with Rislone [Re: MVFarms] #4839387
08/13/18 06:49 PM
08/13/18 06:49 PM
Joined: May 2015
Posts: 264
St. Louis, MO
Lawn_Care Offline
Lawn_Care  Offline
Joined: May 2015
Posts: 264
St. Louis, MO
Throw in some MMO and really watch this thread take off.


hide


True victory does not come from defeating an enemy. True victory comes from giving love and changing an enemies heart.
Re: Observation with Rislone [Re: Lawn_Care] #4839532
08/13/18 09:37 PM
08/13/18 09:37 PM
Joined: Nov 2006
Posts: 20,300
MA, Mittelfranken.de
Trav Offline
Trav  Offline
Joined: Nov 2006
Posts: 20,300
MA, Mittelfranken.de
Originally Posted By: Lawn_Care
Throw in some MMO and really watch this thread take off.


hide


crackmeup


ASE L1, Master. Deutsch Meisterbrief.
Re: Observation with Rislone [Re: MVFarms] #4839830
08/14/18 10:06 AM
08/14/18 10:06 AM
Joined: Jun 2002
Posts: 19,386
Iowegia - USA
MolaKule Offline
MolaKule  Offline
Joined: Jun 2002
Posts: 19,386
Iowegia - USA
The Rislone product is about a 20 grade oil so a reduction in oil viscosity is possible.


Using a 15W40 in an engine engine speced for a 30 grade oil will raise engine temperatures slightly, so if the 40 grade temp was lowered by the thinning the oil with a 20 grade, the temp difference might be a few degrees.


Rislone can clean certain engine components such as VVT valves and hydraulic lifters.


Why are oil filters placed over chassis rails and cross members?
Re: Observation with Rislone [Re: MolaKule] #4839982
08/14/18 12:32 PM
08/14/18 12:32 PM
Joined: Nov 2006
Posts: 20,300
MA, Mittelfranken.de
Trav Offline
Trav  Offline
Joined: Nov 2006
Posts: 20,300
MA, Mittelfranken.de
He used the concentrate 16oz bottle IIRC, is it still 20w?


ASE L1, Master. Deutsch Meisterbrief.
Re: Observation with Rislone [Re: Trav] #4840406
08/14/18 07:34 PM
08/14/18 07:34 PM
Joined: Jun 2002
Posts: 19,386
Iowegia - USA
MolaKule Offline
MolaKule  Offline
Joined: Jun 2002
Posts: 19,386
Iowegia - USA
Originally Posted By: Trav
He used the concentrate 16oz bottle IIRC, is it still 20w?


If it is this product it is still a 20 grade:

https://rislone.com/wp-content/uploads/2014/11/4102-Tech-Sheet1.pdf


Why are oil filters placed over chassis rails and cross members?
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