CMP fluids question ..........

[cantankrs]

Originally Posted by Phil Waterman

Alex I’m willing to bet that your friendly brake experts feelings about silicon brake fluid was centered around the rubber parts compatibility issue and the differences in tolerances between modern systems designed for silicon and those systems designed for regular DOT 3. Which is a very good point to consider.

Originally Posted by Bob Carriere

I would not consider using old, seemingly good, brake lines and would not try to flush them clean but rebuild the whole brake setup...... expensive.. Yes..... but so stopping a CMP on the rear end of a Honda.

Hi Phil and Bob, and Neil,

So the brake man was probably thinking just that, that at the end of the day Safety and not using other objects (or people) to stop against is paramount.
Thanks for all your info - much appreciated.

Regards

Alex

[Barry Churcher]

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