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  #1  
Old 07-20-2017, 02:50 PM
bob888 bob888 is offline
 
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Default Oil Level

Is there a consensus re acceptable oil level to minimize venting through the breather yet maintain a safe margin in the engine?
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  #2  
Old 07-20-2017, 03:49 PM
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Quote:
Originally Posted by bob888 View Post
Is there a consensus re acceptable oil level to minimize venting through the breather yet maintain a safe margin in the engine?
6.5-8qts. I know some people who add a half quart or full quart when it gets to there preferred level in this range. Most -10's seem to blow out quickly over 8.5qts.

Edit: ...but I doubt you'll get much consensus on this.
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  #3  
Old 07-20-2017, 04:06 PM
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Ivan Kristensen Ivan Kristensen is offline
 
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Default Oil level

At oil and filter change I will add 9 qts. of oil. After first engine run that will show at about 8.5 on the dip stick. Fly the airplane until the oil dip stick shows 7.5-8 and then add a quart. (typically 10-15 hrs.) Anything over 9 qts. on the dip stick is too much and will get blow out the breather and show up as on the belly.
I believe the book says the engine will run safely down to something close to 4 qts. but I would not test that....
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  #4  
Old 07-20-2017, 05:47 PM
rv7charlie rv7charlie is online now
 
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An O-320 is supposed to have a 2 quart minimum...

Most a/c oil sumps were spec'd to keep from running out of oil before the fuel ran out.
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  #5  
Old 07-20-2017, 06:28 PM
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I keep mine between 7.5 and 9 Qts.
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  #6  
Old 07-20-2017, 06:40 PM
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Toobuilder Toobuilder is offline
 
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I add 8 at oil change (full), and add again when it hits 6.
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  #7  
Old 07-20-2017, 07:03 PM
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vernon smith vernon smith is online now
 
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I'm curious, have no experience to go on. What is a "normal" hourly oil consumption rate at say half way to OH time? One qt every 5 hours, every 10 hours?
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  #8  
Old 07-20-2017, 09:23 PM
ReidVaitor ReidVaitor is offline
 
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Default oil level

I asked my engine builder years ago, his response- let the oil go down until it stops losing oil. 6qts is were it stops and loses very little below that mark. I have added more (7qts) on new changes and it keeps the same temps and throws it out most oil quickly than stabilizes at 6.
My temps are 200F +/- 10F at 6 qts in warmer climates
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  #9  
Old 07-20-2017, 09:46 PM
rv7charlie rv7charlie is online now
 
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Quote:
Originally Posted by vernon smith View Post
I'm curious, have no experience to go on. What is a "normal" hourly oil consumption rate at say half way to OH time? One qt every 5 hours, every 10 hours?
I don't think there is a 'normal'. But if you haven't seen the oil consumption numbers that Lyc considers acceptable, you're probably in for a shock. (Hint: oil pan capacity; see my previous post.)

Charlie
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  #10  
Old 07-21-2017, 09:45 AM
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Quote:
Originally Posted by vernon smith View Post
I'm curious, have no experience to go on. What is a "normal" hourly oil consumption rate at say half way to OH time? One qt every 5 hours, every 10 hours?
The normal/acceptable oil consumption rate is below 5 Hours per quart to upwards of 20.
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