[T3] Gas tank cleaning

[Bobsnotch at aol.com]

In a message dated 11/5/2012 4:09:17 A.M. Eastern Standard Time,  
mountainvw at hotmail.com writes:

What  would be the "Soluable Oil"????????????????????I never heard about 
it, what  description do you need to tell in a shop what you want????Will it 
also work  with that oil even your car is stored most of the time, at least 
ten month a  year, will the gas tank not start to rust again if it is just 
the bare metal  and your soluable oil??? No coating to  protect?????



Soluable oil is a cutting fluid that you can get thru most industrial  
supply houses, or machine shops. It's basically a cutting oil/coolant used for  
machining. The idea is to use it until the vehicle is put back into full  
time service, as the gasoline is "supposed" to keep the tank from rusting.
 
 This was actually recommended by VW (it's in the blue Bentley). They  
actually wanted you to use a Derusting Phosphate Agent called "Antox Extra  M", 
which was mixed @10 parts water to 1 part of it first. It  is  supposed to 
give a good pickling effect, and leaves a phosphate film on the  tank.Then 
you used the soluable oil as a rinse to prevent rust. However, I  asked 
several people that are in the know, where 1 would find the "Antox  extra M", but 
kept coming up empty. I really didn't like option "B" (as VW  called it), 
where you used hydrochloric acid to clean the tank (mixed 20 parts  acid, to 
80 parts water, and 1 part restrainer). :O This didn't sound like a  good 
idea for the "home user". I have heard of people using "swimming pool  acid" 
with good results. I'm not sure which one it is though, as it's been  about 4 
or 5 years since I did the digging to find an alternative. 
In the end though, I just replaced the fuel tank, since it was for my  
wife's car. ;-)
 
Bob 65 Notch  S with sunroof and IRS (Krusty)
64 T-34 Ghia  (Wolfie)
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