I would agree with Cletrac. I have never had good luck with silicone fluid and DOT 3 when used properly will give better brakes. 80/90 gear oil preferably GL-1 as opposed to the more readily available GL-5 will work for the trans, transfer and diffs. GL-1 is not hard on yellow metal as is the GL-5. You don't need the EP additives of gear oil in the trans so you could use a good quality 50 weight detergent oil. HD 50 is the same viscosity as 90 gear oil. The best engine oil is one of the high mileage oils (Valvoline is one). Newer motor oils have less zinc and the zinc is important for flat tappet engines. Like lead in the gas it is a lubricant and a cushion. It also works as an anti oxidant to reduce corrosion. The newer engines have roller rockers and no zinc. Zinc is hard on catalytic converters and will contaminate 02 sensors. The high mileage oils have more zinc or you can now buy good zinc additives. Motor oil has changed significantly in the last 10 years and it is going to get worse for old engines. A very good additive is GM's EOS. It has been around forever and works well.
Barry
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Every twenty minute job is one broken bolt away from a three day ordeal.
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04-04-09, 03:54
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