Ferrari Mailing List: Re: GT4 video...

[LarryT (l02turner]

Hello,
   As I understand it, and I have been messing with these issues for a 
number of years: synthetics have smaller molecules which can make an 
existing leak worse.  My experience has shown this to be true.  Also, the 
leaks did not leak as bad after 12K - 15K miles using synthetic.   Leaks 
that did not exist before changing to synthetic were not created by 
Synthetics.  When an oil is said to be "high detergent" or 'excellent 
cleaning' it is referring to its ability to suspend contaminants in the oil 
so it can be removed by a filter.

   Also, I have found engines and tranmissions (using ATF) have begun to 
start easier and easier, shift smoother and run cooler & quieter as 
additional mileage and oil changes are experienced.  The benefits seem to 
continue the longer I use synthetics. More miles, more benefits -

   I use Mobil 1 15W50 in my 911, Ford Van, Nissan Pickup and Mobil 1 5W40 
Truck & Diesel in my Mercedes Diesels along with Mobil 1 ATF in all auto 
transmissions.   I am a huge proponent of synthetics.  My 911 leaks a 
little - maybe a tablespoon overnight, neither MB nor the Van or pickup have 
any leaks.

   I change my engine oil and filter at 4000 mile intervals, although I 
could probably go to 7000 or 8000  without problems based on oil analysis.

   You may benefit from reading the technical article on Oil at 
www.lnengineering.com since your Ferrari is a little older.  It concerns a 
recent reformulation of oils which has reduced the amount of the lubricants 
Phosphorus and Zinc in an effort to extend the life of catalytic converters.

Sorry I could not be more helpful -

Larry T (67 MGB, 74 911, 78 240D, 91 300D)
www.youroil.net for Oil Analysis and Weber Parts
Test Results http://members.rennlist.com/oil
PORSCHE POSTERS!  youroil.net
Weber Carb Info http://members.rennlist.com/webercarbs
.

----- Original Message ----- 
From: "JIM WILCOX" <jimshadow [at] verizon.net>
To: "Larry Turner" <l02turner [at] comcast.net>
Cc: "The FerrariList" <ferrari [at] ferrarilist.com>
Sent: Monday, January 21, 2008 6:15 PM
Subject: Re: [Ferrari] GT4 video...


> My understanding is that the newer oils with slip agents are (for lack of 
> better descriptors)  "too thin"  and that's why there is more in the way 
> of issues vs. the NS fluids in the 308 trannys.  Also, the synthetics 
> allegedly have great cleaners in them that wash away the crud that may be 
> holding back any leaky seals, etc.....AM I CORRECT IN THIS THINKING OR AM 
> I WAY OFF?????
>
>  I"m having the exact OPPOSITE problem as you Hans.    My car always had 
> Redline in it.  After the accident/drop gear issue it came back to me with 
> Mobil 1 in it and now I get 'chattering' in 4th and 5th.   If I'm too 
> aggressive 5th will grind.    I never had those problems  with RL.    The 
> next warm day with no salt on the roads, I'm changing out the tranny fluid 
> to all Redline 75/90NS.
>
>  JIM
>
> "Hans E. Hansen" <FList [at] hanshansen.org> wrote:
>  Yup. I mixed in a qt of the "non-NS" (ie regular 75W90) to get a
> bit of positrac lube.
>
> Positrac shudders, pops, and binds, 2nd and 3rd are 'notchy', and it has
> a minor grind going into 4th at redline that wasn't there immediately 
> before
> changing oil. Before changing oil, the only trans issue was the
> infamous "can't go into 2nd when cold". That disappeared after the
> oil change, but the other problems popped up.
>
> If I run the holy pee out of the car on a hot day, the oil heats up
> and thins down. Then it shifts OK. But that is not practical on
> a daily basis.
>
> Gut feeling based on much studying: I need a thinner oil.
> MTL has been recommended extensively, and is apparently
> the fluid of choice for 348 and 355 Challenge cars. I'll
> try it soon.
>
> Hans.
>
> On 1/21/08, jimshadow [at] verizon.net wrote:
> > Did you use the redline NS???
> >
> > Jim
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