WTF oil level
03-26-2018, 02:28 PM
#16
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Will dropping in the oil filter lower the oil level 200 to 300 ML's?
03-26-2018, 07:10 PM
#17
Drifting
I’m usually pretty good at this. My first “overfill”. Since you don’t think this is fatal I may see what happens on my next drive. Good question about what is held in the oil filter. Not much I would imagine, due to position.
I like the $50 extractor. Might be a good tool to have around anyway. I’ll probably order one. But has anyone gained access to the sump? Just for grins I tried putting a hose down the filler and that was a no-go. Feels like there is a screen or something a few inches down. Is there access through the filter opening?
I like the $50 extractor. Might be a good tool to have around anyway. I’ll probably order one. But has anyone gained access to the sump? Just for grins I tried putting a hose down the filler and that was a no-go. Feels like there is a screen or something a few inches down. Is there access through the filter opening?
03-26-2018, 07:56 PM
#18
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Originally Posted by BradB
I’m usually pretty good at this. My first “overfill”. Since you don’t think this is fatal I may see what happens on my next drive. Good question about what is held in the oil filter. Not much I would imagine, due to position.
I like the $50 extractor. Might be a good tool to have around anyway. I’ll probably order one. But has anyone gained access to the sump? Just for grins I tried putting a hose down the filler and that was a no-go. Feels like there is a screen or something a few inches down. Is there access through the filter opening?
I like the $50 extractor. Might be a good tool to have around anyway. I’ll probably order one. But has anyone gained access to the sump? Just for grins I tried putting a hose down the filler and that was a no-go. Feels like there is a screen or something a few inches down. Is there access through the filter opening?
An extractor won't work on our cars, because you can't access the oil through the filler cap.
03-27-2018, 03:46 AM
#20
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You can loosen the drain plug a little and let some oil drain out into your catch pan. It's easy to control with some rubber gloves on then just tighten back up.
03-27-2018, 09:04 AM
#21
Drifting
I will probably give it a drive or two and see what happens per LexVan’s suggestion. But I do wonder if there is a path to the sump through the opening at the base of the oil filter?
03-27-2018, 09:13 AM
#22
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Brad, I'd bet if you run in Sport Plus mode (if you have Sport Chrono) with the lower oil temperature loop, you won't even trip the yellow overfill sensor.
03-27-2018, 09:39 AM
#23
Drifting
03-27-2018, 10:04 AM
#24
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Here's The Math
Here's the math Brad, if you're into that kind of thing. I posted this a couple years ago:
Max expansion starts to happen above the 210-215 mark.
Specific volume of a unit can be expressed as
The change in the units volume when temperature change can be expressed as
dV = V0 β (t1 - t0) (2)
v = 1 / ρ = V / m (1)
where
v = specific volume (m3/kg)
ρ = density (kg/m3)
V = volume of unit (m3)
m = mass of unit (kg)
The density of a fluid when the temperature is changed can be expressed as
where
dV = V1 - V0 = change in volume (m3)
β = volumetric temperature expansion coefficient (m3/m3 oC)
t1 = final temperature (oC)
t0 = initial temperature (oC)
ρ1 = m / V0 (1 + β (t1 - t0))
= ρ0 / (1 + β (t1 - t0)) (3)
where
ρ1 = final density (kg/m3)
ρ0 = initial density (kg/m3)
Volumetric Temperature Coefficients - β - of some common Fluids •water : 0.000214 (1/oC),
•ethyl alcohol : 0.00109 (1/ oC), 0.00061 (1/oF)
•oil : 0.00070 (1/oC), 0.00039 (1/oF)
Hot engine ~220F and room temp ~75F and that's 145F temp difference. The oil volume expansion is then 0.00039 * 145 = 5.6%
5.6% of 9L of oil = 0.5L
Max expansion starts to happen above the 210-215 mark.
Specific volume of a unit can be expressed as
The change in the units volume when temperature change can be expressed as
dV = V0 β (t1 - t0) (2)
v = 1 / ρ = V / m (1)
where
v = specific volume (m3/kg)
ρ = density (kg/m3)
V = volume of unit (m3)
m = mass of unit (kg)
The density of a fluid when the temperature is changed can be expressed as
where
dV = V1 - V0 = change in volume (m3)
β = volumetric temperature expansion coefficient (m3/m3 oC)
t1 = final temperature (oC)
t0 = initial temperature (oC)
ρ1 = m / V0 (1 + β (t1 - t0))
= ρ0 / (1 + β (t1 - t0)) (3)
where
ρ1 = final density (kg/m3)
ρ0 = initial density (kg/m3)
Volumetric Temperature Coefficients - β - of some common Fluids •water : 0.000214 (1/oC),
•ethyl alcohol : 0.00109 (1/ oC), 0.00061 (1/oF)
•oil : 0.00070 (1/oC), 0.00039 (1/oF)
Hot engine ~220F and room temp ~75F and that's 145F temp difference. The oil volume expansion is then 0.00039 * 145 = 5.6%
5.6% of 9L of oil = 0.5L
03-27-2018, 11:30 AM
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Originally Posted by BradB
Cool, I actually followed this through. My head hurts, but it’s still cool! Now, what happens with altitude change? 
05-07-2018, 11:41 AM
#28
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Hey, Brad, how about an update, please??
05-07-2018, 01:12 PM
#29
Drifting
The fill warning was bugging me so I removed the oil filter and was able to turkey-baste a small amount of oil out of the base of the oil filter. I didn’t measure but it must have been about a cup, and that was all it took. Everything is fine now.