Silicon oil.

helander · Post by **helander** » Sun Apr 15, 2012 1:00 am

Can I use silicon oil (only thin layer) for conservation transmission and another gear boxes before final assembly on the frame?
And second question: Can I use 80W140 oil for all transmission without any risk?
Thank you for answers.

GPA · Post by **GPA** » Sun Apr 15, 2012 1:07 am

Why don't you use the proper recommended SAE 90 gear oil with low sulphur content?

helander · Post by **helander** » Tue Apr 17, 2012 12:34 pm

Because guy who is restoring jeeps in Holland recommends me this kind of oil. My question was just to be sure that is correct.

Post by **wesk** » Wed Apr 18, 2012 2:16 am

Do not use silicon grease or silicon spray lube in a mechanism that is normally operated on a petroleum base oil. The silicon can never be completely flushed out of the system. If you want a temporary preservative use LPS3 or the equivlent.

You can use the modern multigrade gear oils like 80W140 but you must select a brand that clearly states their oil's sulpher content is low enough not to harm non-ferrous metals like brass synchro rings in your transmission.

helander · Post by **helander** » Sat Apr 21, 2012 11:29 pm

Thank you Wesk. Till now I used spray silicon on some parts in transmission, so I hope that it is no big problem or have I to clean it again?
In my country supplier doesn´t know LPS3, i must try to find other equivalent.

Post by **wesk** » Sun Apr 22, 2012 8:48 am

LPS3 is a simple oil (petroleum) based spray oil. You do not want to use an oil based preservative oil when your primary purpose is lubrication. Those leave a sticky film on surfaces to help prevent corrosion.

There are no cleaners that will remove every trace of silicon. This is one reason I avoid its use.

helander · Post by **helander** » Sun Apr 22, 2012 1:03 pm

O.K. and thank you again Wesk.