Synthetic oil?

[great white]

The story: synthetics started in the aviation industry, and not because they are/were any better. They don't burn! The theory was that crashing a plane full Of synthetics as aposed to castor oils is much less of a flame infested scenario. It took them three years to meet "MilSpec" 5606 with a synthetic oil. It took that long to make a synthetic come close to a castor oil for performance.

Actually, synthetic oil did not start in aviation. Synthetic oil was "created" in the late 20's by Germany to deal with their shortage of oil stocks "in country" and it was used in vehicles fro everything from fuel to lubricants: http://www.caer.uky.edu/energeia/PDF/vol12_5.pdf

The World Wars kicked it's production into high gear, especially when Germany was "cut off" from the oil field it was "accessing" in the south.

5606 is hydraulic oil. It is used in everything from oleos and struts to brake systems and hydraulic rams in systems and flight controls. Mil-H-5606, Mil-PRF-5606 and Nato H-515. They're all mineral oil based. H-5606 isn't really used in military avaiation any more. We've switched to PRF-5606, which is a higher "grade".

The 5606 "family" is fire resistant, not fire proof. Skydrol is more so, but that's dirty, deadly, toxic stuff. Carcinogenic, heavily carcinogenic. I've lost a couple friends to it that worked with it on the Boeing 707. Well, cancer where they got hit with it. Employer denied it was the cause.

And yes: 5606 definitely does burn. It burns rather well in a crash: http://www.skybrary.aero/index.php/Hydraulic_Fluid_as_a_Fire_Source

So does the F34/JP8 and the 23699 engine oils. So does 555 gearbox oil and etc.....

They all burn.

Quite spectacularly actually.

It's one of our biggest fear in a crash, other than the sudden stop that is....

 

[great white]

Well FWIW, if you have a pre-95 engine that's running around with a flat tappet cam it would behoove you to run a CJ-4 spec oil. Newer oils have very low levels of a specific friction modifying compound to protect 3-way catalytic converters, and the end result is a large increase in the number of problems coming from flat tappet cams. You have two choices, you can throw in a zinc additive with every oil change and hope the mix is good, or just use an off the shelf HDEO (think Shell Rotella, Mobil Delvac, etc) that has all the proper additives for keeping things prim and proper. I've been running Motorcraft 15w40 (not that my involvement with ConocoPhillips has anything to do with that....) for years and changing it at 7K miles or so and no issues with starting when it's cold as space outside. Even though it's sold as "Diesel" oil it's spec'd for gasoline engines as well.

Oh Gawd, not that internet "flat tappet" hokkum again.....

 

[great white]

I run Dex VI in my 4L80E. I won't go into why. That can be found by reading the side of a bottle.



If the transmission fluid isnt red and clear when you change it, it's either burnt (IE: abused) or the clutchs/bands (IE: friction material) are nearly gone in the transmission.

 

[sewlow]

...the sudden stop....

Ahhh...yea. 'Sea-Kings'! Nuff said!

 

[great white]

Ahhh...yea. 'Sea-Kings'! Nuff said!

Nope, couldn't get me on one of those things for all the tea in china.

the cyclone?

Well, I don't think we're ever going to actually get those anyways.

There's only like 2 or 3 pre acceptance ones in Canada right now....another gov't boondoggle in the making....a la F-35.

 

[sewlow]

Oil changes are maintenance.
Sea-Kings are a maintenance nightmare! 30 man-hours of maintenance for EVERY hour of flight! NO oil can fix that!
Political B.S. has prevented a new platform from replacing them. And the S-K's were considered old in 1987!

I've seen a Cyclone do an inside loop, and a barrel roll along with some other tricks (Flying pointed straight up!) right in front of our hanger, doing a demo for political big wigs! In 1998!!!
And the S-K's are still flying! The $$$ spent on maintaining that pig could of been put towards a new platform!

The Commorant was a better idea. Pricey, but better! A Cadillac!

Thread jack over. Return to the subject at hand!

 

[great white]

The Commorant was a better idea. Pricey, but better! A Cadillac!

Oh, if only you knew what I know.....But I can't say.

I'm not a fan of jail time.....

 

[GMCTRUCKS]

You put a limited slip additive in your transmission?

Yes it works as a additive for Transmissions my buddy thats a Cert Tech has done it a may of times and he is one hell of a tech is just that my T.C. is trash.

. Hey guys what about the problem I had when I tried placing a deep trans pan on my Trans it would hit the pan is there a special filter I should use?????

Im trying to find out before I have the T.C. put on my truck.

 

[K15 Blazer]

pretty sure they require a synthetic because synthetics hold up to heat so well....
in my truck I run royal purple in everything (except the motor) because its proven to cut friction and heat... and you only change that oil every 30,000 miles or so, so you might as well make the investment and get GOOD oil in those components....

the engine on the other hand- cheap walmart 20w-50 synthetic oil... on account of, you change it every 3,000 miles... which is a couple months...

(I run 20w-50 because synthetic oil does not hold up good push-back pressure when hot... if I run 5w-30 my oil pressure drops to like.... 8psi...)