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Old 05-21-2013, 11:02 AM   #1
Grayghost66 OP
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Location: Toronto, Ontario
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1992 BMW R100 GSPD Oil Consumption

Hi All,

Just got back from a 2,750km extended long weekend ride through the US. My GS performed great but should I be concerned with the oil consumption? Here are a few details, if you could let me know your thoughts it would be appreciated. I just need to know if this is normal or if I might have an issue;
  1. I am the original owner (stating this because I know the complete bike history)
  2. Ridiculous amount of oil changes, sometimes at intervals of 2,000km. Absolute minimum of 42-50 oil changes since I've bought her. All I've documented in a log.
  3. Total mileage is 43,000km
  4. The ride we were just on was "spirited" lets just say "higher" highway speeds for extended amounts of time.
  5. I do have a 6% over 5th gear (thanks Bruno Machine)
  6. After the first 1,200km running like that I needed to add .4 litres of oil
  7. Another 1,200km I needed to add another .4 litre.
  8. Total consumption in 2,750km was 1 litre.
  9. When I left Toronto I was running 10w40 Golden Spectro Dino oil (cool out) and we hit some seriously HOT weather in the US. I started topping up with 20w50 MC oil.
Soooo what do you think? is the oil consumption what you would consider normal, or is pulling the heads, a valve job and new piston rings in this winters project "to do" list?

My friends can keep their Vstroms. I like my Airhead.

Grayghost
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Old 05-21-2013, 11:20 AM   #2
chollo9
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I wouldn't think that 1/3 quart of 10w40 per 500 miles on an airhead with 26000 miles on it would warrant a teardown (sorry, but while I can think in terms of kilometers and such, I have to convert for this type of thing).
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Old 05-21-2013, 11:41 AM   #3
GJUNKY
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Sounds normal to me.
Why are you changing the oil so often?
42-50 oil changes in 43k
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Old 05-21-2013, 11:58 AM   #4
patrkbukly
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Should I buy...

...stock in BP now???
...were you anywhere near Valdez Alaska in the 80's.

Ok jus kidding, to me 1/3rd quart per 500 miles is fine. I am not a mechanic but I am a GSPD rider of 73,000 miles on her.
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Old 05-21-2013, 12:30 PM   #5
darklight79
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Every1000

Miles ? Has the drainplug hole stripped out yet i overfill seems to happen by accident when it burns down to the max mark change out. Filter every 6 thousand oil every 3 thousand might burn 1/4 of quart in between changes
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Old 05-21-2013, 12:41 PM   #6
bmweuro
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Did you fill the oil all the way to the top line?
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Old 05-21-2013, 01:34 PM   #7
Beater
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Describe the process for checking your oil ...
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Old 05-21-2013, 01:53 PM   #8
Grayghost66 OP
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Quote:
Originally Posted by Beater View Post
Describe the process for checking your oil ...
Base line reference is 2.5 litres with a filter change and 2.25 litres without a filter change.
  1. Start the bike and ride it until warm.
  2. Put the bike on the centre stand on level ground
  3. Unscrew the dipstick, wipe it and reinstall WITHOUT screwing it in. Pull out dipstick making sure it is close to vertical (to get an accurate reading). Then repeat to double check.
  4. Oil is always so clean it is difficult to read.
  5. Fill to the top line as shown with the cross hatch marks on the dipstick.
Sound about right?
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Old 05-21-2013, 01:54 PM   #9
Grayghost66 OP
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Quote:
Originally Posted by bmweuro View Post
Did you fill the oil all the way to the top line?
Always. Top line as demarcated by the top of the cross hatch marks.
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Old 05-21-2013, 01:57 PM   #10
Grayghost66 OP
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Quote:
Originally Posted by bmweuro View Post
Did you fill the oil all the way to the top line?
Hmmmm......

You might be onto something here. Some oil had puked out of the vent hole towards the front of the engine, on the engine casting, close to the dipstick. It was more than oil mist, but less than an overfill "puke out". Not enough to wet the bottom of the engine or get on any of the parts of the bike. Found it odd though.
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Old 05-21-2013, 02:01 PM   #11
Grayghost66 OP
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Quote:
Originally Posted by GJUNKY View Post
Sounds normal to me.
Why are you changing the oil so often?
42-50 oil changes in 43k
Two reasons. I am an maintenance fanatic (always a waiting list for any bike or car I sell) and the second reason is that I really don't ride very much.

There were some years I only rode 500 - 750 kms, so the bike got an oil change in the spring, one mid summer, and a final one for winter storage. For me it was a "time" rather than mileage factor in changing the oil.
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Old 05-21-2013, 02:06 PM   #12
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Quote:
Originally Posted by Grayghost66 View Post
Hmmmm......

You might be onto something here. Some oil had puked out of the vent hole towards the front of the engine, on the engine casting, close to the dipstick. It was more than oil mist, but less than an overfill "puke out". Not enough to wet the bottom of the engine or get on any of the parts of the bike. Found it odd though.
I think what he was getting at is if you fill oil all the way up to the 'full' mark on the dip stick, it gets consumed relatively quickly until it gets down to about midway between the marks at which point consumption slows quite a bit.
...allegedly.
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Old 05-21-2013, 02:07 PM   #13
Grayghost66 OP
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Quote:
Originally Posted by Patrick C Buckl View Post
...stock in BP now???
...were you anywhere near Valdez Alaska in the 80's.

Ok jus kidding, to me 1/3rd quart per 500 miles is fine. I am not a mechanic but I am a GSPD rider of 73,000 miles on her.
I need to ask, in your 73,000 miles have you had the heads off, reground valve seats, replaced valves, push rod seals or replaced piston rings?
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Old 05-21-2013, 02:49 PM   #14
gsd4me
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Are you using a K&N air filter? If so you may well have early engine wear.
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Old 05-21-2013, 02:57 PM   #15
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Awesome that you added that 'allegedly' AW.

The BS is starting to get deep now.

K+N filter? Like most people run them with no oil? Or with oil? With oil, they filter a lot better than paper. I have seen that turn out time after time after time servicing square airboxes. The stock paper filters are crap!
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