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Old 01-27-2014, 11:21 AM   #1
Join Date: Jan 2014
Posts: 13
Additives to Fluids

I am a new owner of a 91 YJ and looking to do the fluids all around so I know they are clean and done. I am wondering if anyone has had good luck with any additives in the transmission gear oil (mine is a 5 spd), or engine,transfer case, differentials fluids. I want to keep it running for many more years and trails to come.

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Old 01-27-2014, 11:29 AM   #2
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If you are using quality fluids and lubricants, buying unspecified additives is a waste of money.

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Old 01-27-2014, 05:03 PM   #3
Join Date: Nov 2012
Location: In The Hot South West AZ, and cold Alaska
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Originally Posted by 2five22 View Post
If you are using quality fluids and lubricants, buying unspecified additives is a waste of money.
X2, the only exception to this is if your are having some lifter noise, then add some Marvel Mystery oil, one (1) pint. Run your engine for about 100 miles and then change it when hot. The additive will help to clean out your engine and has been used successfully for years to help with noisy lifters.
Other than this, additives are not needed!
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Old 01-27-2014, 06:11 PM   #4
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Location: Denver, CO
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I really like "restore" which is an oil additive...cut down my lifter noise and overall smoothed everything out in my 99. I added it for the first time at around 90k and have been doing so since.

I'm not usually into the "additives" but figured why not give it a back if you dont notice anything and made in usa so i gave it a shot. Worked great for me.

Other than this, i havent used additives.
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