VansAirForceForums  
Home > VansAirForceForums

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

- Today's Posts | Insert Pics

  #1  
Old 01-03-2018, 09:43 AM
pa38112 pa38112 is offline
 
Join Date: Mar 2008
Location: Clarksboro, NJ
Posts: 489
Default Interesting oil comparison

I apologize if this has been posted before, but it is my first time seeing it:

https://www.blackstone-labs.com/about-aircraft-oils.php

About once a year I start to question my oil selection and re-research the subject. Here is a truly independent third party that has lots of data to pull from. Almost any other "research" done on the subject is done by the oil or additive companies, who have an agenda.
__________________
http://aprs.fi/N153MC
2004 RV6A Flying
Reply With Quote
  #2  
Old 01-03-2018, 10:05 AM
rv6ejguy's Avatar
rv6ejguy rv6ejguy is offline
 
Join Date: Mar 2005
Location: Calgary, Canada
Posts: 4,143
Default

Interesting but I'm doubtful about the detonation claim using "other" oils. I have a couple customers who have many hundreds of hours each using Mobil 1 in Lycomings with zero issues to date.
__________________

Ross Farnham, Calgary, Alberta
Turbo Subaru EJ22, Marcotte M-300, IVO, RV6A C-GVZX flying from CYBW since 2003- 418.1 hrs. on the Hobbs,
RV10 95% built- Sold 2016
http://www.sdsefi.com/aircraft.html
http://sdsefi.com/cpi.htm


Reply With Quote
  #3  
Old 01-03-2018, 10:44 AM
tim2542 tim2542 is offline
 
Join Date: Aug 2009
Location: Redding,Ca
Posts: 550
Default

They must mean pre-ignition, ie from carbon deposits maybe. There is no way detonation could be caused by oil.
Ive always wondered why we call some oils "mineral" oil when all Aviation oil is mineral based. Why not call it A/D or non A/D?
Tim Andres
Reply With Quote
  #4  
Old 01-03-2018, 10:57 AM
rv6ejguy's Avatar
rv6ejguy rv6ejguy is offline
 
Join Date: Mar 2005
Location: Calgary, Canada
Posts: 4,143
Default

Quote:
Originally Posted by tim2542 View Post
They must mean pre-ignition, ie from carbon deposits maybe. There is no way detonation could be caused by oil.

Tim Andres
As we've seen in other threads, many people lump detonation and pre-ignition together even though the causes and effects are vastly different.
__________________

Ross Farnham, Calgary, Alberta
Turbo Subaru EJ22, Marcotte M-300, IVO, RV6A C-GVZX flying from CYBW since 2003- 418.1 hrs. on the Hobbs,
RV10 95% built- Sold 2016
http://www.sdsefi.com/aircraft.html
http://sdsefi.com/cpi.htm


Reply With Quote
  #5  
Old 01-03-2018, 11:02 AM
bret's Avatar
bret bret is offline
 
Join Date: Feb 2010
Location: Gardnerville Nv.
Posts: 2,728
Default

I once had a conversation about oil with an oil guy, I asked about the multi weight oil, he had a very educated complex explanation but the one part I remember is that with a multi weight oil, you start off with a thin base oil, and then add the viscosity improvers to make it thicker when it gets warmer. so to do this you have the thin base oil, then subtract the amount of base oil to add the long chain viscosity improver additive that is not oil and you have less base oil lubricant. My experience has been the single wt W100 holds viscosity better at high temps than the multi weight oil.... but that's just one example with my setup.
__________________
7A Slider, EFII Angle 360, CS, SJ.
2018 gladly supported

Last edited by bret : 01-03-2018 at 11:03 AM. Reason: sp
Reply With Quote
  #6  
Old 01-03-2018, 11:11 AM
Mel's Avatar
Mel Mel is online now
 
Join Date: Mar 2005
Location: Dallas area
Posts: 9,726
Default

Quote:
Originally Posted by tim2542 View Post
Ive always wondered why we call some oils "mineral" oil when all Aviation oil is mineral based. Why not call it A/D or non A/D?
Tim Andres
I think the term comes from people comparing "straight mineral oil" to "AD oils". Over time the "straight" was simply omitted.
__________________
Mel Asberry..DAR since last century
A&P/EAA Tech Counselor/Flight Advisor
Specializing in Amateur-Built and Light-Sport Aircraft
<rvmel(at)icloud.com>
North Texas (8TA5)
RV-6 Flying since 1993, 175hp O-320, 3-Blade Catto (since 2003)
Legend Cub purchased 12/2017
FRIEND of the RV-1
Eagle's Nest Mentor
Reply With Quote
  #7  
Old 01-03-2018, 11:29 AM
bret's Avatar
bret bret is offline
 
Join Date: Feb 2010
Location: Gardnerville Nv.
Posts: 2,728
Default

Quote:
Originally Posted by tim2542 View Post
They must mean pre-ignition, ie from carbon deposits maybe. There is no way detonation could be caused by oil.
Ive always wondered why we call some oils "mineral" oil when all Aviation oil is mineral based. Why not call it A/D or non A/D?
Tim Andres
In extreme and rare cases where oil is introduced to the top of the piston via worn valve guide or rings, compression ignition can occur, think how fuel oil is auto ignited in a diesel.
__________________
7A Slider, EFII Angle 360, CS, SJ.
2018 gladly supported
Reply With Quote
  #8  
Old 01-03-2018, 11:53 AM
6 Gun 6 Gun is offline
 
Join Date: Jun 2005
Posts: 777
Smile Oil Testing

I have been studying oil to try to come up with a auto oil for my Lycoming just resent I sent oil to a testing lab to analyze additive package for 15w-50w aeroshell have not received info yet.Also sent a new bottle of Aeroshell 15-50 to a mechanical engineer that has a web site called 540 Rat were he has tested over 200 brands of oil for wear protection the now posted results for the Aeroshell is number 34 on the list it was an interesting test and he said that in his long career of testing oil it was the only oil to increase in protection when he heated it from 235f to 276f.
Bob
Reply With Quote
  #9  
Old 01-03-2018, 01:08 PM
PerfTech's Avatar
PerfTech PerfTech is offline
 
Join Date: Sep 2010
Location: Yucaipa, Ca.
Posts: 1,245
Default

Quote:
Originally Posted by tim2542 View Post
They must mean pre-ignition, ie from carbon deposits maybe. There is no way detonation could be caused by oil.
Ive always wondered why we call some oils "mineral" oil when all Aviation oil is mineral based. Why not call it A/D or non A/D?
Tim Andres
....Actually the presents of oil (even in small amounts) in the fuel,
or in the combustion process, reduces the octane. This reduction
can allow detonation to begin. Once started, it can be self propagating,
snowball, and be very destructive. Thanks, Allan...
__________________
Allan Nimmo
AntiSplatAero.com
Innovative Aircraft Safety
Products, Tools & Services
Info@AntiSplatAero.com
Southern California (KREI)
RV-9A / Edge-540
(909) 824-1020
Reply With Quote
  #10  
Old 01-03-2018, 01:38 PM
jabarr jabarr is online now
 
Join Date: Sep 2008
Location: Fayetteville, Georgia
Posts: 143
Default

This is the most comprehensive study I’ve come across. Although only one aircraft oil was included, it is quite educational covering all aspects of oil technology. Very interesting about the temps that the oils are expected to run vs what we strive for in our world—-
It’s a very long read.

https://540ratblog.wordpress.com/201...-test-ranking/
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 06:02 PM.


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.