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Old 06-08-2011, 11:48 AM   #15
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This is our second mh with the 8.1 and both use about 1 qt./2,000 mi. First coach had about 85,000 on it when we sold it and oil consumption never changed. I normaly do oil and filter change at 5,000.
Perry; I have never heard of a maintenance free engine, who builds one that makes that claim ?
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Old 06-08-2011, 12:07 PM   #16
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MY experience is different

I just completed a 4913 mile round trip from Oregon to Kentucky at 4600 miles I had to add one quart of oil. My 8.1 has never used oil, I change it normally at 4000 miles and use Mobil One 10/30. I normally never have to add oil between changes. I have made the above trip 3 times and have only added oil In Pendleton, OR on the way home. I now have about 60,000 miles. I don't let my 8.1 rev over 4000 rpm.
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Old 06-08-2011, 12:20 PM   #17
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Not sure if this relates to you or your situation, but when I worked for an auto dealer I had a customer who insisted on changing his oil to Mobil one when the motor had less then 1,000 miles. We ended up replacing the engine under warranty because the piston rings/oil rings never wore in properly. He was burning a qt every 600 miles.
We sealed the drain plug and made him return in 5,000 miles for his first oil change.
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Old 06-08-2011, 12:25 PM   #18
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My 8.1 uses a quart of oil in 2000 miles.
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Old 06-08-2011, 01:17 PM   #19
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I can go all summer w/o using any oil, and all Winter as well, But if I drive it in the mountains,, I normally have to add a quart, epically if I am pulling a towed car.

It seems it only sucks oil when I really "Stand on it" as it were. Normal (For me) driving I may suck a quart between changes OR LESS.

One thing.. If your engine is a "long time between changes" enging.. IT may need the added quart between changes.. The reason is yes. Some VERY SLIGHT oil use is normal.. But if you are getting the Low Oil messge.. that is likely excessive, (That is also likely more than a quart low)
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Old 06-08-2011, 02:26 PM   #20
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Hi Peter,

FIRST you need to establish that when the oil is changed, the shop actually puts in the correct amount. When you had it changed the last time, do you know that they put in the correct amount. Example - if they only put in 5 quarts and ASSUMED it was correct but your engine should have 6 quarts, you started off 1 quart low.

Could be as simple as that.
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Old 06-08-2011, 03:20 PM   #21
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Wish I could get a cheepo 36 buck oil change! I'd hand the mechanic Mobile1 and smile

Seems you've got it good... 36 buck oil changes and a Stanley Cup

You need to own the dip stick. After your oil change, have the mechanic show you the new level and watch the procedure. Take note. Do this every time before you set out on a journey and note the mileage when you top it off.

Please don't overfill your 8.1. More is not better.

My 8.1 uses some oil and it depends on whether I'm pulling my horse trailer or freewheeling.

PS Coolant level and tire pressure are also important!
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Old 06-08-2011, 03:57 PM   #22
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Back in the 90's chevy said 1 qt within 400 miles was acceptable. I didn't agree but they would not do anything for customers with engines that used that much oil. I have had four 454 eng. motorhomes. They were from 1985 to 1995. They all averaged 1 qt per 1500 miles. I would add 1 qt at 1500 miles and then change oil at the next 1500.
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Old 06-08-2011, 05:54 PM   #23
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Quote:
Originally Posted by Mekanic View Post
...A quart to 1k miles is not unusual at all....
I know of no company that would lift a finger to fix a engine using 1 quart per 1k Nor would I ask them to.
thanks Mekanic
pdq
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Old 06-08-2011, 05:59 PM   #24
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Quote:
Originally Posted by Nick-B View Post
...your engine should have 6 quarts, you started off 1 quart low...
Could be as simple as that.
thanks Nick
I leaned before my first oil change "How many quarts for this engine"
the garage is familiar with the engine - and yes - put in 6 quarts (they base their price on number of quarts)

and it took only one quart to be completely topped up

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Old 06-08-2011, 06:05 PM   #25
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Quote:
Originally Posted by iRV4FUN View Post
Wish I could get a cheepo 36 buck oil change...
it was by luck that i found the garage
if you are ever in Newport OR...

Quote:
Originally Posted by iRV4FUN View Post
...After your oil change, have the mechanic show you the new level and watch the procedure....
did this at last oil change - not ready to start doing my own pil changes - well just yet anyway...

Quote:
Originally Posted by iRV4FUN View Post
...Please don't overfill your 8.1. More is not better.
didn't know this - so very good to know

Thanks!
pdq

p.s. don't have the cup ....JUST YET!!!
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Old 06-08-2011, 06:18 PM   #26
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Quote:
Originally Posted by Nick-B View Post
Hi Peter,

FIRST you need to establish that when the oil is changed, the shop actually puts in the correct amount. When you had it changed the last time, do you know that they put in the correct amount. Example - if they only put in 5 quarts and ASSUMED it was correct but your engine should have 6 quarts, you started off 1 quart low.

Could be as simple as that.
You are miss-informed about the oil capacity of the 8.1. It calls for 6.4 qts.
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Old 06-09-2011, 07:52 AM   #27
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Quote:
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Hi Peter,

FIRST you need to establish that when the oil is changed, the shop actually puts in the correct amount. When you had it changed the last time, do you know that they put in the correct amount. Example - if they only put in 5 quarts and ASSUMED it was correct but your engine should have 6 quarts, you started off 1 quart low.

Could be as simple as that.
In both the chevy and ford manuals, there was a note that there was a probem with dipsticks for motorhomes. they both suggested filling the engine with the correct amount of oil. Running it. Shut it down for ten minutes. Check the oil level. If it shows high or low, mark it with a file. This is the true oil levels.
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Old 06-09-2011, 02:16 PM   #28
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Quote:
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You are miss-informed about the oil capacity of the 8.1. It calls for 6.4 qts.
Hi Harold. Not only am I mis-informed, I am UN-informed.
The 6qt. amount was given as an example only - as stated.
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