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Can you mix oil weights?



 
 
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  #1  
Old January 2nd 04, 08:50 PM
Ben Jackson
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Default Can you mix oil weights?

Let's say you're at a point where you need to add a quart of oil.
You've decided you would like to finish this oil change interval at
a lighter weight (eg you put in AeroShell W100, SAE-50, and now it's
freaking cold). Can you add a quart of a (substantially?) lighter
weight oil (presumably in the same 'series')?

--
Ben Jackson

http://www.ben.com/
  #2  
Old January 2nd 04, 09:13 PM
Dave
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Default


"Ben Jackson" wrote in message
news:CQkJb.261117$_M.1211945@attbi_s54...
Let's say you're at a point where you need to add a quart of oil.
You've decided you would like to finish this oil change interval at
a lighter weight (eg you put in AeroShell W100, SAE-50, and now it's
freaking cold). Can you add a quart of a (substantially?) lighter
weight oil (presumably in the same 'series')?

--
Ben Jackson


why not just change the whole lot and do the job properly?


  #3  
Old January 2nd 04, 09:13 PM
Dave Stadt
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Default



"Ben Jackson" wrote in message
news:CQkJb.261117$_M.1211945@attbi_s54...
Let's say you're at a point where you need to add a quart of oil.
You've decided you would like to finish this oil change interval at
a lighter weight (eg you put in AeroShell W100, SAE-50, and now it's
freaking cold). Can you add a quart of a (substantially?) lighter
weight oil (presumably in the same 'series')?

--
Ben Jackson

http://www.ben.com/


Aeroshell says it is just fine to do so:

"All approved SAE J-1899 (former MIL-L-22851) and SAE J-1966 (former
MIL-L-6082) AeroShell oils are compatible."



  #4  
Old January 2nd 04, 09:35 PM
Kyle Boatright
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Default


"Ben Jackson" wrote in message
news:CQkJb.261117$_M.1211945@attbi_s54...
Let's say you're at a point where you need to add a quart of oil.
You've decided you would like to finish this oil change interval at
a lighter weight (eg you put in AeroShell W100, SAE-50, and now it's
freaking cold). Can you add a quart of a (substantially?) lighter
weight oil (presumably in the same 'series')?

--
Ben Jackson

http://www.ben.com/


Absolutely. All aviation oils are compatible, and have to be to meet the
appropriate spec's. Otherwise, you'd be SOL if you needed to add a quart of
oil and the FBO on the airport you stopped at didn't carry *your*
brand/weight of oil.

KB


  #5  
Old January 2nd 04, 09:40 PM
Ron Natalie
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Default


"Dave" wrote in message ...

"Ben Jackson" wrote in message
news:CQkJb.261117$_M.1211945@attbi_s54...
Let's say you're at a point where you need to add a quart of oil.
You've decided you would like to finish this oil change interval at
a lighter weight (eg you put in AeroShell W100, SAE-50, and now it's
freaking cold). Can you add a quart of a (substantially?) lighter
weight oil (presumably in the same 'series')?

--
Ben Jackson


why not just change the whole lot and do the job properly?

Shell says you can mix grades of AeroShell as long as both grades
are allowed for your engine.

  #6  
Old January 3rd 04, 12:16 AM
Ben Jackson
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Default

In article ,
Dave wrote:

why not just change the whole lot and do the job properly?


Did I mention it's freaking cold?!

Heck, with the weather around here I don't even want to go to my Shell
distributor to get the oil, one quart or a whole case.

--
Ben Jackson

http://www.ben.com/
  #7  
Old January 3rd 04, 01:44 AM
Mike Rapoport
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Default

Yes you can, but it might take a lot to make a meaningful difference unless
your engine is a big leaker.

Mike
MU-2


"Ben Jackson" wrote in message
news:CQkJb.261117$_M.1211945@attbi_s54...
Let's say you're at a point where you need to add a quart of oil.
You've decided you would like to finish this oil change interval at
a lighter weight (eg you put in AeroShell W100, SAE-50, and now it's
freaking cold). Can you add a quart of a (substantially?) lighter
weight oil (presumably in the same 'series')?

--
Ben Jackson

http://www.ben.com/



  #8  
Old January 3rd 04, 04:03 AM
G.R. Patterson III
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Default



Ben Jackson wrote:

Can you add a quart of a (substantially?) lighter
weight oil (presumably in the same 'series')?


Yes.

George Patterson
Great discoveries are not announced with "Eureka!". What's usually said is
"Hummmmm... That's interesting...."
  #9  
Old January 3rd 04, 02:45 PM
Dave S
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Default

heheh..

too cold to drive and get oil.. but not too cold to fly and burn it
off.. thats a die hard pilot.

Dave

Ben Jackson wrote:
In article ,
Dave wrote:

why not just change the whole lot and do the job properly?



Did I mention it's freaking cold?!

Heck, with the weather around here I don't even want to go to my Shell
distributor to get the oil, one quart or a whole case.


 




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