Lifters and Synth Oil

[iain.atkinson at tesco.net]

I think the point Phil was making was that 0w oils are too thin for the I5 engine. 5w40 or 50 is much better suited this age of engine design.

Iain
> 
> From: George Harris <harchris at smokesignal.net>
> Date: 2004/01/17 Sat PM 02:45:03 GMT
> To: Phil Payne <quattro at isham-research.com>,  quattro at audifans.com
> Subject: Re: Lifters and Synth Oil
> 
> I know that Phil and most on the list already know all this, but I would 
> hate for a misunderstanding to develop that 0W30 synthetic is not as 
> good as 0W30 dino oil when used in our I5s.
> 
> One of the main advantages of full synthetic oil is that you can get 
> them with a wider range of viscosity. Since the '0' in 0W30 means that 
> it is as thin as a standard 0 weight oil at room temperature or 'cold' 
> and the '30' means it is as thick as a standard 30 weight oil at 
> operating temperature, then it is a big advantage to use 0W50, only 
> available in synthetic, because when you first start up, the oil will 
> flow quickly to the dry bearings and start lubricating quickly even when 
> used in winter temperatures in Canada. But when the engine is hot the 
> oil will still have the same body as a standard 50 weight oil. Unless 
> the rating system is inaccurate, or there is some important factor not 
> compensated for by the rating, a 0W30 synthetic should not make the 
> engine rattle any more than a 0W30 dino oil.
> 
> BUT why use 0W30 when you can get 0W50 for the same price?
> 
> Cheers
> George
> 
> Phil Payne wrote:
> >>As they were dumping oil from my boost tubes, I asked if they could tell if
> >>it
> >>was dino or synth oil (since I had just switched to synth a thousand miles
> >>ago).  Both the service advisor and the mechanic said to switch back to dino
> >>immediately.  They were quite clear that I *would* have lifter problems
> >>(their
> >>words: "every time").
> >>
> >>Does any one have any information about this??
> > 
> > 
> > Having just read Al's response - I wonder.
> > 
> > Over here (UK) "synthetic" usually means Mobil 1 or something similar.  If you walk into one
> > of the auto stores such as Halfords and ask for some Mobil 1, they will without comment give
> > you a can of 0W30 or 0W40.  These oils _will_ make your lifters rattle - they're much too thin
> > for I5 engines.
> > 
> > I wonder if that's what your monkey boys really mean.
> > 
> > --
> >   Phil Payne
> >   http://www.isham-research.com/quattro
> >   +44 7785 302 803
> >   +49 173 6242039
> > 
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> > 
> > 
> 
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