Just remember that using/adding oil is good for an engine. Within reason.
It keeps the buildup of impurities in the oil down such as lead and
other by-products of combustion.
Additives in oil tend to wear out after a while and by adding new oil,
your also adding new additives.

It's nice to say that your using a quart in 15-25 hours, but what really
is the state of your oil?

Just a thought.


wrote:

This thread has made me feel a bit better about mine. I've got a 180 hp O-360
Lycoming with a fresh top inspection on chrome jugs. I thought that the 1qt in 8-10
hours I was getting was a bit high, but seems to be fairly inline with what some other
folks are getting. Supposedly the chrome jugs just plain burn more oil. My buddy's
250 hp O-540 burns a quart in 15 hours or so on Nitrided jugs.

I don't run more than 7 quarts in it either, or it'll belch it out. The power
useage makes a difference too. At low power settings and low altitudes, the low
manfold pressure seems to suck more oil past the rings (8 hours/qt) from the ambient
crankcase. At higher powers/altitudes, it burns less (10 hours/qt).

-Cory
Dan
Luke
wrote:
: "GE" wrote:
: Still shopping for my first bird. Curious as to how much
: oil usage is considered "normal"?

: My Lyc.O-360 burns a quart every 8 hours. Lycoming says as low as 3.5
: hrs/qt would be acceptable. As others do, I refrain from filling it to
: the 8-quart maximum.
: --
: Dan
: C172RG at BFM