Oil Level Check - Behaviour of oil levels at different temps
I have just completed an oil and filter change on my 2011 GSXR600L1 for the first time (previously done by Suzuki) and I am a bit confused by the oil level readings. I was a little blase when filling up the oil and think i may have over filled a bit. I put in about 2.7 litres to achieve readings I see now (manual calls for 2.5).
I am looking for some plausible explanations for what I am seeing and whether or not other people have experienced the following:
All levels are taken with the bike level.
1) When the bike has been sitting over night, the oil has settled and is cold it reads over full. Oil line just below the very top of the sight glass (small bubble of air). I believe this is to be expected as oil has drained to the bottom and markings are based on "warm" levels. Correct? Should it read overfull by this magnitude?
2) In accordance with the service manual, cold prior to riding, I run bike at idle for 3 minutes, stop, and then wait a further 3 minutes before checking level. Oil is at about 55 degrees C (so not at normal operating temp but warm). Level reads about 3/4 full (above L, below F). This, in accordance with the manual is a good check.
3) Jump on bike and go for a 20 minute blat. On return prior to shut off I let bike idle for 1 min then shut off. Oil is hot and at about 85-90 Celsius. Wait 3 minutes. Level now reads above full and just at the top of the sight glass. - Is this normal? ie should i expect to see such a difference in levels between 50 degrees C (warm) and normal riding temps of 75-90 degrees C?
I understand thermal expansion will have some effect on oil but in this quantity, over this temperature range, is it enough to cause such a change in the levels in the sight glass to read above full?
I have trawled countless forums and online articles to determine whether it is normal to show above full when conducting a check hot (but still after waiting 3 mins) with no clear answer.
Any advice on this would be appreciated. I didn't pay a lot of notice to the behavior of the oil levels when Suzuki was doing the servicing because I trusted it would have been done right, and with a brand new bike not burn oil. Probably a bad move and not technically savvy of me..
Last edited by BWalm; 08-08-2013 at 06:02 AM.