Change Oil Weight, Temp Gauge Reads Lower

Messages
5
I just had my O&F done at the KIA dealer. I always supply the oil, this time I brought in 5w-30 Castrol Edge API SN Plus. Last O&F was January 10 and I used Pennzoil Ultra Platinum 5w-20. It's a 2017 KIA Soul 1.6 automatic with under 20,000 on it.
The temp gauge reads a little lower than before. Always, before this O&F, the needle was just a hair below the 1/2 line. Now it reads about halfway, or a little lower, in the quadrant between 3/8 and 1/2. Weird.

Temp gauge has ALWAYS been consistent before this. I'm baffled.


.
 
Messages
294
Location
MN
There is no logical reason for this other than being a coincidence. Plus, I highly doubt that gauge would be sensitive enough to register a small change in operating temp. Most temp gauges these days are more so idiot lights than actual gauges.
 

Neanderthal

Thread starter
Messages
5
There is no logical reason for this other than being a coincidence. Plus, I highly doubt that gauge would be sensitive enough to register a small change in operating temp. Most temp gauges these days are more so idiot lights than actual gauges.
I agree it's illogical. The gauge has never varied a bit before this.
 
Messages
7,500
Location
Roanoke Virginia
I’m guessing just a coincidence. And really the dealer lets you bring your own oil? Around here the shops pull the classic we can’t use stuff you provide for liability reasons stunt.
 
Messages
2,347
Location
WA
Your oil temp could be a little higher. Guessing ~5-15F.

My dummy coolant temp gauge stays in EXACT same spot (just below the half mark) from iirc ~168F to 208F max that I've ever recorded with odbii. Under normal conditions I always read 184-194F and the car is almost 16 years old.
Never seen it go above that mark. I'm sure when the steam is coming out, it may move and/or jump to the red zone near the top.
 
Last edited:
Messages
6,005
Location
down in the park
I just had my O&F done at the KIA dealer. I always supply the oil, this time I brought in 5w-30 Castrol Edge API SN Plus. Last O&F was January 10 and I used Pennzoil Ultra Platinum 5w-20. It's a 2017 KIA Soul 1.6 automatic with under 20,000 on it.
The temp gauge reads a little lower than before. Always, before this O&F, the needle was just a hair below the 1/2 line. Now it reads about halfway, or a little lower, in the quadrant between 3/8 and 1/2. Weird.

Temp gauge has ALWAYS been consistent before this. I'm baffled.


.
the fake gauges used in kia/hyundai always read halfway between 80 and 90. I'm a dealer tech, I watch those gauges in a lot of cars. They can be off by 20 degrees too.

Maybe you can find some videos on youtube of hyundais and kias at operating temp, you can confirm for yourself.
 
Messages
1,843
Location
California
the fake gauges used in kia/hyundai always read halfway between 80 and 90. I'm a dealer tech, I watch those gauges in a lot of cars. They can be off by 20 degrees too.
My dummy coolant temp gauge stays in EXACT same spot (just below the half mark) from iirc ~168F to 208F max that I've ever recorded with odbii. Under normal conditions I always read 184-194F and the car is almost 16 years old.
Never seen it go above that mark. I'm sure when the steam is coming out, it may move and/or jump to the red zone near the top.
This is exactly what Tman220 meant by "idiot light" in post #3 above.
Whether it's cruising highway in 35F temps or idling 10 minutes in 110F temps, my 2006 Tacoma coolant gauge always reads the same thing: "normal temperature" LOL.
 
Messages
2,524
Location
South Carolina
If it's a dummy gauge it will go from cold to operating temp in an instant. All of my gauges slowly rise to op temp as I drive so I suppose they aren't dummy gauges. On the other hand, oil pressure "gauges" on my Ford's are dummy gauges.
 
Messages
398
Location
MD
My coolant temp (OBD reading) fluctuates between 190F and 208F. Oil temp is a tad hotter 192F to 210F. I didn't find 0w40 to register any higher oil temp than 5w30.
 
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