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I'm going to replace the gear oil in the transmission/transfer case on my dad's '63 CJ5. No one knows when it was changed since it was originally my grandfather's. To give you an idea, the differential oil was black. It doesn't see much use and only drives around the farm. I noticed driving it...

Wrong category my bad.

I'm going to replace the gear oil in the transmission/transfer case on my dad's '63 CJ5. No one knows when it was changed since it was originally my grandfather's. To give you an idea, the differential oil was black. It doesn't see much use and only drives around the farm. I noticed driving it...

That first oil analysis did not have 875 miles on it. No clue how many miles were on that oil. Odometer was at 875 miles.

True mileage. Never rebuilt. It was my grandfathers. It sat A LOT. It sat for about 20 years before I got it.

The oil analysis before this one had no additive.

1300 miles on the bike. 300 miles on the oil. Oil was very dark. Liqui Moly 4T 20w50 with Lucas ZDDP additive. Engine had some sludge in it, frequent oil changes for cleaning.

Despite the oil filter looking like that, Blackstone report looks pretty good. That Lucas oil ZDDP additive really has some Zinc and Phosphorus in it thats for sure. It also raised the TBN. Should I continue to use it?

Snowbaum’s articles are very informative but a LOT to read. I was actually trying to buy an ‘78 R100s. That’s the one that will likely need it then.

I already have a cheap inert gas available. Argon from my welder.

You're probably right.

Yes, I got the idea from Snowbaum. The motorcycle has very very low miles on it. I hear from some they experienced issues early on and others with none at all. Figured if it's not hurting anything, better safe than sorry.

$20+/gal vs $8/gal ....

I was going to mix a few ounces of 100LL with every gallon of 93 octane from my local gas station. It should be enough to protect the valve seats but not enough to cause any fouling.

Not the same.

They sell ethanol free gas and premix gas in air tight containers.

Unfortunately they don’t sell 100LL like that.

https://bmwmotorcycletech.info/valves.htm

Need the lead to protect the valve seats. Lead forms a protective barrier on them.

I believe these containers are airtight.