There are taxis here in melbourne (OZ not FL) taking part in an experiment
to test the performance of a new type of oil filter. Many have done
250,000km (150,000miles) without an oil change and the oil is not black yet.
The filter? A toilet roll that has been unravelled then wound up a bit
tighter and the cardboard tube removed!
Heard about this a couple of years ago, but nothing since.....hmmm.
Andy
>From: "Geoff Branch" <branch@valinet.com>
>Reply-To: "Geoff Branch" <branch@valinet.com>
>To: "Nory P" <nory_midget@yahoo.com>, <RBHouston@aol.com>,
><JStock0540@aol.com>, <spridgets@autox.team.net>
>Subject: Re: oil addatives
>Date: Thu, 3 Jun 1999 13:39:35 -0400
>
>Three years ago my boss sent me to the University mechanical engineering
>library to research any and all information on oils and additives. At the
>time we were trying to extend the oil change intervals on some 850HP
>natural
>gas engines we run. In a nutshell, what I learned was that PTFE (*eflon)
>cannot possibly "bond with the metal" ( the claim of the snake oil
>salesmen)
>of a combustion chamber because the temperatures are way to low. Remember
>that teflon is used as a high temperature anti friction compound. You can
>add things to your oil to increase the Total Base Number and decrease the
>Total Acid Number as these wear out, but this is not practical on a 4 qt.
>sump. In fact it's not even practical on our 43 GALLON sumps!! Also, in a
>liquid fueled engine, the oil becomes polluted (oxidation and nitration,
>etc.) long before any of the additives break down. Anyway...these lead us
>to the conclusion that changing the oil is the best protection, and the
>cheapest. We currently run 2,000 hours between changes with straight 40
>weight oil.
>
>Geoff Branch '74 Meejut "Yellow Peril"
>-----Original Message-----
>From: Nory P <nory_midget@yahoo.com>
>To: RBHouston@aol.com <RBHouston@aol.com>; JStock0540@aol.com
><JStock0540@aol.com>; spridgets@autox.team.net <spridgets@autox.team.net>
>Date: Wednesday, June 02, 1999 12:56 PM
>Subject: Re: oil addatives
>
>
> >
> >
> >I know everybody puts down these additives and says
> >they're a waste of money, but I'd like to relate a
> >short story:
> >
> >The postman where I used to work had a Midget (bought
> >it new in the UK while he was in the service, and
> >shipped it home when he got out). Not long after
> >Slick 50 came out, being impressed by the TV
> >commercials, he added some with his next oil change.
> >He apparently did not tighten the oil filter enough
> >and, the next day, it began to leak. The leak didn't
> >seem too serious, so he opted to drive the car to work
> >(and back) that day, planning to fix it when he got
> >home that night. Well, the leak got much worse,
> >unbeknownst (love that word) to him, and by the time
> >he got home and checked out the situation, he found he
> >had no oil left at all! He had no idea how long it
> >was running without oil, but he attributes the lack of
> >any engine damage to his use of Slick 50 (just like
> >the commercials said!).
> >
> >I, personally, don't use the stuff and never have, but
> >when someone tells you of an experience like that, you
> >wonder if maybe it wouldn't be worth trying, just to
> >be on the safe side.
> >
> >YMMV
> >===
> >
> >***The above address is for list purposes only. Please send private
>e-mail, as before, to Nory@webtv.net
> >-----NORY
> >http://www.geocities.com/SiliconValley/Way/9101
> >Don't assume that because you have found one problem, you have found the
>ONLY problem.
> >
> >
> >
>
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