25/60 oil

alan hodge · Dec 21, 2021

what you'uns think about this oil for 850 commando?

Phillips 66 X/C Aviation Oil 25W60 Gallon | Aircraft Spruce ®

Phillips 66 X/C Aviation Oil 25W60 Gallon /C 25W-60 is the first and only multiviscosity aviation oil designed and approved for radial engines originally designed to run on 120 grade.

www.aircraftspruce.com

kommando · Dec 21, 2021

If its not in the test database of does not count

mean gene · Dec 21, 2021

Alan, I would worry about the "original" 120 grade. Seems a little heavy for me. The data base has great information and I appreciate all the work that went into it. But if you change oils regularly I feel that's equally important. Remember what these old bikes were designed to run on. I run a 20-50 petroleum base high zinc oil. I knew guys that swore by Rotella, diesel engine oil, for their Harleys, it worked but question if it was best!

alan hodge · Dec 21, 2021

well as i have previously stated i use Vulvalean 20/50 in all my bikes and the garden tiller too the 25/60 caught my eye for the 68 A65 BSA and the commando just curious

mean gene · Dec 21, 2021

I didn't see the "radial" before, I would think that price is a deal.

Peter R · Dec 22, 2021

mean gene said:
I didn't see the "radial" before, I would think that price is a deal.

Remember that radial aircraft engines run at much lower rpm than our Nortons.
Totally different engines and running conditions, I would not use this oil in my bikes anyway.

concours · Dec 22, 2021

Peter R said:
Remember that radial aircraft engines run at much lower rpm than our Nortons.
Totally different engines and running conditions, I would not use this oil in my bikes anyway.

Yabut, what about piston speed?
(I love a good oil thread!)

Onder · Dec 22, 2021

We used to run Aeroshell AD straight 50 in the Enfields so we could pretend we had oil pressure. Turns out that aero oil is no friend of ours. Aircooled aeroengines live in a different world. Low rpm, low compression lots of cooling air. Radials tend to use a lot of oil too. Some is ingested and some is leaked, they grow a lot when hot.
Stick with Jim's list until somebody does a better test. Don't hold your breath waiting for it.
Oh, and that 50 weight ? The price was right. We were young etc.

mean gene · Dec 22, 2021

What about crank journal diameter and type of bearing materials. Bronze bushed or plain aluminum small end bearing!! Are they silver bearings or Babbitt?

LOL Everyone have a nice holiday!!!

25/60 oil

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