Oil Change

[isham-research.freeserve.co.uk at pop.pol.net.uk]

>> It's also a good idea to do a proper flush (not just the
>> additive sort) every 100k or so.

>> What's a "proper flush"?  Automotive chain stores usually sell cans of
>> motor flush.  I always thought they were snake oil.  I also thought they
>> could be dangerous to the bearings since I assumed it was some kind of
>> solvent with no lubricating properties and no viscosity to prevent metal to
>> metal contact.  So, how do I flush the lubricating system of an engine?

> Phil answered this earlier today, look back a few posts. Like you I had always
> assumed these products were akin to 'slick50' type marketing products and
> avoided them.

The additive varieties are, IMO.  The first run with 'proper'
flushing oil always comes out tar-like, even when one of the additives
has been used.

> Phil, I can get Comma flushing oil locally, is their product ok? I remember
> you mentioned them a while back but I can't remember if it was a recommendation
> or not.

It's what I use.  It certainly has viscosity, but it also doesn't
have the lubricating properties needed for the outside lane of the M1
or 5,000 miles running.

--
 Phil Payne
 http://www.isham-research.freeserve.co.uk/quattro
 Phone +44 7785 302803   Fax: +44 7785 309674