I am considering purchasing a new 2024 crosstrek Subaru,,,i have looked through bitog past threads, is Idemitsu still the current manufacture of this oil as of 2024? as I will adhere to their dealership oil changes, for now, then ultimately on to my own oil changes of a 0w-16, of whatever brand,Amsoil ss or HPL etc ,,any input is appreciated.
suburu 0w-16 engine oil
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The last time it has been discussed here Idemitsu was the supplier of Subaru oil. you could also use a 0W-20 they're both meant to satisfy CAFE where the 16 is to just wring out a few extra MPG on paper real world driving I doubt you'll notice a difference.
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Why would you use the stuff unless you feel that .3 mpg is worth additional wear on your engine with 0W-16. Serious question.
I don't know about the Idemitsu product, but toyota ultra light grade oils show tons of moly on the VOA that is not present in 0W20.
I had to run a 10W30 on my Ford to keep it from sounding like all the parts were falling out. To my surprise the dealer installed "something special" when I had them do the last OC. and the engine is now reasonably quiet. I have no faith that they use oil that is shown on the R.O. - but that is what I put on my signature line. I plan to investigate more next month when I am in for my annual safety/emissions inspection
Honestly not that big a factor. At freezing 0W-16 is 100 cSts and 0W-20 is 120. The difference comes in at 200F where 0W-16 is like 6 cSts compared to 0W-20 which is like 8 cSts.
Higher viscosity, higher rpms and low loads are your bearings friends. By contrast low viscosity, heavier loads and lower rpms are their enemies.
Mobil 1 0w30 esp and call it a day. Of course Amsoil or HPL would take it to the next level.
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The oil in my buddies Subaru hits like 230f. That's 30 weight oil territory.
Yeah, ours probably gets up there too on a hot day with a couple boats on the roof.... There is a under tray and active grill shutter, so it definitely warms up fast.
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My 2024 crosstrek has only had 0w-16 in it once, on the factory fill. since then it’s had 0w-20 and one time I ram 0w-30 for the lolz. Thinking about going back to 0w-30 on my next oil change.
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Have you guys ever changed hot 20 weight oil? It flows like water… it literally flows and moves like water that is black.
Never saw that when changing hot 40 weight diesel oil.
Never saw that when changing hot 40 weight diesel oil.
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It’s a highlander issue.. I routinely hit 230 driving in the mountains, hit 238 going up Ike’s gauntlet in February. On a 20 weight to boot.. I put A LOT of load on my engine just driving up the mountains in Colorado north of 8000’ elevation. All on 20 weight mostly..
That sounds like severe use.
At 240f that oil is likely around 6 cSt and that's assuming you started with thic off the shelf 20 weight that's almost 30 weight.
I would imagine that the operating temp of the oil was a consideration prior to moving to the 16 recommendation.
Ex: Toyota has an extensive heating/cooling system with the A25/M20 engines to ensure the oil gets up to temp quickly and doesn’t overheat. Operating temp is where you want the oil to be for maximizing fuel economy. Which is the whole point of using 16 in the first place.
Ex: Toyota has an extensive heating/cooling system with the A25/M20 engines to ensure the oil gets up to temp quickly and doesn’t overheat. Operating temp is where you want the oil to be for maximizing fuel economy. Which is the whole point of using 16 in the first place.
Which Subaru?
Highest I have ever seen on ours was 235, once, climbing a mountain pass. Normal operating temp is about 208 or so.
2024 Forester gauge reads just over 200 usually after it's good and warm, unless on the highway at higher speeds. At 70 +/- mph in the summer, I see it hit 217 F. I have no idea how accurate it is.
The the bigger one and the last year for port injection.
Normally it runs around 210f gets over 220f hill climbs. Once in a while it will creep over 230, usually trying to do 75mph in a summer head wind.
my 2011 and 2015 foresters with the 6MT routinely exceeded 230f but never 240f.
The 2022 wilderness that I only had for 20k miles ran slightly cooler. but still everyday drives would be 220-228f
summertime with towing and aerodynamically challenged might break 230f.
The 2024 outback with the 2.4T hit 215 once floored up a mountain.
usually 190f-208f Which makes me think 0w20 is not actually a terrible choice but... turbo so 0w30 IMO.
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