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Old 09-22-2004, 09:29 PM   #1
bigpaulo
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Default how much can you overfill oil before foaming occurs?

Yes, yes, I'm well aware of the dangers of too much oil... PCVs that suck up ungodly amounts of oil, blown seals, high oil consumption, foaming and apocolypse

However, it makes logical sense that, as long as the crankcase isn't frothing the oil at startup, having as much oil in your crankcase as possible will help it last longer and stay cleaner... seeing as how when the engine is under way, a good amount of oil is circulating around the engine and is not sitting in the oil pan, so the oil level while running is actually quite a bit lower than at startup.

So, does anyone know how much you can safely overfill a MY02 TS? Or any other late model Subaru variant?
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Old 09-23-2004, 12:17 AM   #2
Al_Smokemcrack
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You'd probably be safest sticking to the rated capacities. You can safely go over by a little, but I wouldn't purposely do it.
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Old 09-23-2004, 12:42 AM   #3
HeyChris
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Unless yer car iz smokin like a diesel truck w/bad injectors.....
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Old 09-24-2004, 09:26 AM   #4
bigpaulo
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Default bump once...

bump once...
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Old 09-24-2004, 10:46 AM   #5
jamesfacts
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PM davenow.... I think he once said 1/2 qt or so.
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Old 09-24-2004, 12:27 PM   #6
DreddRS25
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Quote:
Originally Posted by americanyouth
PM davenow.... I think he once said 1/2 qt or so.
I've had about a half-quart to much before. However my car burns about that much over 1500-2000 miles so it wasn't too bad. Though I don't recommend leaving it overflowed if possible to drain some out easily.
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Old 09-24-2004, 07:30 PM   #7
pooparu
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I've put in 1/2 a quart over before and it had no dire effect that i could see. However i did go over by a quart in my old car (mercury mistake) and that led to several costly problems. unless you are burning/leaking like crazy I would stick to the factory numbers.
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Old 09-25-2004, 07:08 PM   #8
Back Road Runner
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I have an '02 Forester. The recommended is 4.2 quarts, but I just throw in 5. I've had the car since February and have changed the oil several times. I have yet to find a reason to not just put in an even 5 quarts.

Now you do bring up some interesting bad and good things that can occur if you go a little overboard with the oil. I'd like to add one good aspect that you didn't mention. Engines with a higher oil capacity run cooler, just thought I'd add that
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Old 09-26-2004, 07:58 PM   #9
HeyChris
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It would seem to make sense on an ecological manner to make it an even amount of oil... i.e. 5quarts... Since the wonderful Erle [oil] companies sell them by the quart. That way there's nothing wasted.... Or add an external oil cooler to make more volume of oil req'd... Just babbling out loud...

Chris.
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Old 09-26-2004, 08:07 PM   #10
Trunk_Monkey
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I overfilled my lawnmower with oil, seemed to mess it up. On steep grades oil got pushed into the piston (I think) and oil started burning. Got pushed into the exhaust and stayed there so whenever it heated up it would smoke slowly. I took the exhaust apart and cleaned it out and its all good now, but I bet big money that that wasnt good for it.
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Old 09-26-2004, 09:54 PM   #11
STi-MAN
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dont over fill ur oil, foaming of oil is REALLY REALLy bad for ur car.
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Old 09-26-2004, 09:54 PM   #12
chip4761
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I overfilled my oil and my oilpan gasket blew out. The woman at the toll booth said, "You need some water." I said, "Oh? Why's that?" She replied, "Because your car is on fire." Fun times. I would try to avoid that if I were you.
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Old 09-27-2004, 11:43 AM   #13
White 2.5rs
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hah
nice one chip
my gl was over by about a half qt
it would randomly smoke like NO OTHER
id be going down the freeway BOOM huge cloud of smoke hahaha the engine would also knock it sounded like when it would happen but i dont know how thats possible on a 1.8garbage engine
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