2019 Subaru Ascent oil cooler results… pretty impressive!

[SubieRubyRoo]

Took the first “long” roadtrip in the Ascent, even though the wife has piled miles on like gas is free…

Anyways, went from near Muncie, IN to Yorktown VA via US-35 and I-64, ended up right at 1,450 miles round trip. Will be pulling UOA sample to see how dilution is doing since it was basically all highway. Ambient temps were 81-96* during drive time.

Flat highway, <65mph: stays 199-201 regardless of ambient, basically mimics coolant temp.

Flat, >65mph: pretty much tracks almost perfectly 2* increase for every 5mph. 70 is ~203*, 75 is 205*, and so on.

I-64 past Sandstone Mountain ((IIRC) where there’s 5+ miles of 7* incline: got as high as 226*F @ 75mph & about 3200rpm due to CVT.

In all cases, as soon as rpm drops, temps drop at least 2* every 15-20 seconds. Even the mountain passes had temps below 208* within about a mile after the peak. Steady 80mph thru Ohio had the gauge parked at 207*. Currently filled with @High Performance Lubricants PCMO 5w30 FTW.

It’s pretty apparent that even though the factory cooler is not visually impressive, Subaru knows what they’re doing!

 

[IndyIan]

Took the first “long” roadtrip in the Ascent, even though the wife has piled miles on like gas is free…

Anyways, went from near Muncie, IN to Yorktown VA via US-35 and I-64, ended up right at 1,450 miles round trip. Will be pulling UOA sample to see how dilution is doing since it was basically all highway. Ambient temps were 81-96* during drive time.

Flat highway, <65mph: stays 199-201 regardless of ambient, basically mimics coolant temp.

Flat, >65mph: pretty much tracks almost perfectly 2* increase for every 5mph. 70 is ~203*, 75 is 205*, and so on.

I-64 past Sandstone Mountain ((IIRC) where there’s 5+ miles of 7* incline: got as high as 226*F @ 75mph & about 3200rpm due to CVT.

In all cases, as soon as rpm drops, temps drop at least 2* every 15-20 seconds. Even the mountain passes had temps below 208* within about a mile after the peak. Steady 80mph thru Ohio had the gauge parked at 207*. Currently filled with @High Performance Lubricants PCMO 5w30 FTW.

It’s pretty apparent that even though the factory cooler is not visually impressive, Subaru knows what they’re doing!

That pretty much is what I find with our Outback as well. I was a bit surprised how much the temp went up at even a moderate 3500 rpm, but this is the first car I've ever been able to know what the oil temp is.

 

[Zee09]

Took the first “long” roadtrip in the Ascent, even though the wife has piled miles on like gas is free…

Anyways, went from near Muncie, IN to Yorktown VA via US-35 and I-64, ended up right at 1,450 miles round trip. Will be pulling UOA sample to see how dilution is doing since it was basically all highway. Ambient temps were 81-96* during drive time.

Flat highway, <65mph: stays 199-201 regardless of ambient, basically mimics coolant temp.

Flat, >65mph: pretty much tracks almost perfectly 2* increase for every 5mph. 70 is ~203*, 75 is 205*, and so on.

I-64 past Sandstone Mountain ((IIRC) where there’s 5+ miles of 7* incline: got as high as 226*F @ 75mph & about 3200rpm due to CVT.

In all cases, as soon as rpm drops, temps drop at least 2* every 15-20 seconds. Even the mountain passes had temps below 208* within about a mile after the peak. Steady 80mph thru Ohio had the gauge parked at 207*. Currently filled with @High Performance Lubricants PCMO 5w30 FTW.

It’s pretty apparent that even though the factory cooler is not visually impressive, Subaru knows what they’re doing!

Did I miss the mpgs

 

[edyvw]

Took the first “long” roadtrip in the Ascent, even though the wife has piled miles on like gas is free…

Anyways, went from near Muncie, IN to Yorktown VA via US-35 and I-64, ended up right at 1,450 miles round trip. Will be pulling UOA sample to see how dilution is doing since it was basically all highway. Ambient temps were 81-96* during drive time.

Flat highway, <65mph: stays 199-201 regardless of ambient, basically mimics coolant temp.

Flat, >65mph: pretty much tracks almost perfectly 2* increase for every 5mph. 70 is ~203*, 75 is 205*, and so on.

I-64 past Sandstone Mountain ((IIRC) where there’s 5+ miles of 7* incline: got as high as 226*F @ 75mph & about 3200rpm due to CVT.

In all cases, as soon as rpm drops, temps drop at least 2* every 15-20 seconds. Even the mountain passes had temps below 208* within about a mile after the peak. Steady 80mph thru Ohio had the gauge parked at 207*. Currently filled with @High Performance Lubricants PCMO 5w30 FTW.

It’s pretty apparent that even though the factory cooler is not visually impressive, Subaru knows what they’re doing!

RPM's are the primary driver of oil temperature.
What is the oil capacity of that 2.4 turbo?

 

[slacktide_bitog]

How many miles on it total?

 

[SubieRubyRoo]

RPM's are the primary driver of oil temperature.
What is the oil capacity of that 2.4 turbo?

4.8qts

How many miles on it total?

Just rolled 82k

Did I miss the mpgs

Nope, didn’t put that in. Couple reasons; have the potential fueling issue I’m waiting on the dealer to dig into, plus the number was pretty abysmal- my ‘19 F150 was within about 0.6mpg of the Ascent on the same trip. Only way I’ve ever seen close to rated highway MPG in this was to set the cruise at 60 (actual number was between overall vehicle rating and highway rating, though).

Plus vehicle speed, load, wind, ambient temps, tire inflation, etc etc etc all weigh in on the result. NVM the fact that some short-term tests with the AC on/off showed the hit was a little over a full MPG… Finally, I used E15 (U88) the whole way also.

 

[SubieRubyRoo]

 

[AZjeff]

What's the back story? You installed a factory cooler?

 

[SubieRubyRoo]

What's the back story? You installed a factory cooler?

No, just doing some data-driven observations on the way to trying to solve the high fuel in my UOAs. Plus deciding that a few ppm of Cu in UOAs is less than harmless when weighing the benefits of the cooler being in place. I’ll add some more later.