sure haven't had ANY issues EVER using that water soluble 'cutting oil' - in
literally thousands of cars over the years. I can't say it does anything to
the hoses. My 85's hoses are , let's see..............23 years old.

personally...........I find that 'my mixture' of quality conventional
anti-frz with water and this water soluble oil works perfectly.
One guy ..........
I don't know if this is really true or not ........one guy claimed that
phosphate-free VW Blue coolant ate out a wbxr water pump in some short
period of time due to silicates in VW  blue coolant.
I'm kinda conservative, and I've seen many cases where 'trying too hard'
............say synthetic oil where conventional oil had been used forever
.............caused problems.  I tend to stay with what I know works.   The
most exotic thing is not always the actual best thing.

I've used Dexcool, and WV Blue coolant, and that kind that's less harmful to
the environment  ( propylene glycol might be it )   I don't usually bother
to these days - just good ole high quality anti-freeze at 50-50 with my oil
additive, and 'in some cases' some BarsLeak.
Scott

----- Original Message -----
From: "Allan Streib" <streib@cs.indiana.edu>
To: "Scott Daniel - Turbovans" <scottdaniel@turbovans.com>
Cc: <vanagon@GERRY.VANAGON.COM>
Sent: Saturday, October 04, 2008 6:22 PM
Subject: Re: draining coolant

> "Scott Daniel  - Turbovans" <scottdaniel@turbovans.com> writes:
>
>> I use conventional high quality ( usually Prestone exteneded life in
>> the bright yellow gallon jug ) anti-frz mixed 50-50
>> with............ where I am ...........clean tap water, and I add
>> water soluble oil' ............'cutting oil' that a machinist would
>> use. Makes a wonderful water pump lube and rust inhibitor - have been
>> doing this on hundreds of cars for a couple decades - works really
>> well.
>
> I'm planning to use Zerex G-05 unless there's a good reason not to.
> It's a phospate-free formulation used by Mercedes, Ford and Chrysler.
>
> Interesting idea about the oil, I recall you mentioning that before.
> Any chance it erodes any of the rubber hoses?
>
> Allan
> --
> 1991 Vanagon GL