VansAirForceForums  
Home > VansAirForceForums

- POSTING RULES
- Donate yearly (please).
- Advertise in here!

- Today's Posts | Insert Pics

  #1  
Old 08-15-2017, 08:30 AM
Tom Martin Tom Martin is offline
 
Join Date: Jan 2005
Location: Ontario, Canada
Posts: 1,252
Default IO 390 engine oil amount

Getting ready to add oil to the 390 and I am wondering what amount seems to work well for the guys that are flying?
__________________
Tom Martin RV1 pilot 4.6hours!
CPL & IFR rated
EVO F1 Rocket 1000 hours,
2010 SARL Rocket 100 race, average speed of 238.6 knots/274.6mph
RV4, RV7, RV10, two HRIIs and five F1 Rockets
RV14 Tail dragger under construction #153

Fairlea Field
St.Thomas, Ontario Canada, CYQS
fairleafield@gmail.com
Reply With Quote
  #2  
Old 08-15-2017, 12:04 PM
Canadian_JOY Canadian_JOY is offline
 
Join Date: Aug 2007
Location: Ontario, Canada
Posts: 1,337
Default

Tom - I'll provide this feedback from another type club where the 390 has been commonly in use for more than a decade, hence this type club likely is the best clearing house for info on the 390 as deployed in amateur-built aircraft. The statement below is a single post which acts as a reasonable summary of a complete discussion thread on the topic of the 390 and oil consumption. It is generally held that the 390, on average, consumes more oil than the 360's in this airframe.

Hope this helps.

==============
I have the IO-390 in my plane -- and love it! The engine has given me no trouble since I built the plane in ... October of 2006. As of this moment, I have 1297-plus hours on it. The engine has had great compression checks at each annual condition inspection. I
buy a box of oil (12 quarts) every 50 hours -- which reflects my total oil consumption.

When I change oil, I put in 8 quarts. Thus, over the next 50 hours, I will consume three to four quarts of oil. That's a consumption rate between 12 and 16 flight hours per quart of oil. ...

I've never had to use more than 12 quarts in 50 hours. Generally, I use 10 or 11. In recent years, I just set the extra quarts aside and figure that when I've got 12, I won't have to buy a box for the next annual.

I know from experience that the engine will consume fairly fast if I fill above 7 quarts so other than when I change the oil, I fill to 6 1/2 (i.e. when the oil drops to 5 3/4 or so). If I fill to 7, the engine consumes down to 6 1/2 quarts in the first flight. There after it stabilizes the consumption rate. If I thought that it was necessary to keep the oil level at 8 quarts then I might get the kinds of oil consumption rates that some people... are suggesting.
Reply With Quote
  #3  
Old 08-15-2017, 02:54 PM
Tom Martin Tom Martin is offline
 
Join Date: Jan 2005
Location: Ontario, Canada
Posts: 1,252
Default

Thanks Mark, good info.
__________________
Tom Martin RV1 pilot 4.6hours!
CPL & IFR rated
EVO F1 Rocket 1000 hours,
2010 SARL Rocket 100 race, average speed of 238.6 knots/274.6mph
RV4, RV7, RV10, two HRIIs and five F1 Rockets
RV14 Tail dragger under construction #153

Fairlea Field
St.Thomas, Ontario Canada, CYQS
fairleafield@gmail.com
Reply With Quote
  #4  
Old 08-15-2017, 03:26 PM
woodmanrog's Avatar
woodmanrog woodmanrog is offline
 
Join Date: May 2005
Location: Florida
Posts: 699
Default

We put 7 in at the oil change and only add when level drops to 5 1/2. Our engine seems happiest at 6 quarts. Using about 10 quarts every 50 hours.
Reply With Quote
  #5  
Old 08-15-2017, 03:32 PM
schristo@mac.com's Avatar
schristo@mac.com schristo@mac.com is offline
 
Join Date: Sep 2007
Location: WA
Posts: 925
Default I put in 7 with an oil change

For an oil change I start with 7 quarts... it shows about 6 1/3 on the dipstick; then add a quart when it drops to around 5.

Generally, it seems to take around 15-20 hours for the first quart then around 10 for the second and third... then, it's about time for the next change.

I am averaging 40 tach hours between changes.
__________________
Stephen

RV7 powered by a lycoming thunderbolt IO-390
turning a whirlwind HRT prop

flying with more than 1,650 on the hobbs
Race 771
margarita!
Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -6. The time now is 11:06 AM.


The VAFForums come to you courtesy Delta Romeo, LLC. By viewing and participating in them you agree to build your plane using standardized methods and practices and to fly it safely and in accordance with the laws governing the country you are located in.