Nick,
Whenever you use an existing topic to start
a new topic, please delete all of the previous discussion; leaving it there
just clouds everything!
Les
From:
Syncro_T3_Australia@yahoogroups.com
[mailto:Syncro_T3_Australia@yahoogroups.com]
Sent: 31 January 2015 18:33
To:
Syncro_T3_Australia@yahoogroups.com
Subject: Re: [Syncro_T3_Australia]
Re: Syncro spotted in Anglesea
Hey, was anyone in Anglesea, vic today (Saturday) in a very nice silver pop top? Nice 5 spoke alloys and non-standard 4wd stickers. Looked like a possible trakka?
Cheers. Nick
On 31 Jan 2015, at 1:15 pm, "'Les Harris' leslieharris@optusnet.com.au
[Syncro_T3_Australia]" <Syncro_T3_Australia@yahoogroups.com>
wrote:
On the matter of mineral versus synthetic oils, I have conversed with lubrication engineers and with people who have extensive gearbox rebuilding experience and they all come up with the same factor – film integrity.
Film integrity is the ability of a lubricant to maintain a cohesive film on a surface when it is under load. What I am told is that synthetic oils cannot achieve the same film integrity as mineral oils in any given situation.
This parallels the experience that Roger has reported and this is the reason that I will continue to use mineral oils to the exclusion of synthetics.
Les
From: Syncro_T3_Australia@yahoogroups.com [mailto:Syncro_T3_Australia@yahoogroups.com]
Sent: 31 January 2015 12:49
To: Syncro_T3_Australia@yahoogroups.com
Subject: [Syncro_T3_Australia] Re: Gearbox Delights
My experiences with synthetic oil in old vehicles have not been good. Transmission mainshaft bearing failed in T2 a week after filling. A grub screw in the gear-set in the transfer case of my Range Rover suddenly fell out after thirty years, soon after changing to synthetic. Co-incidence?
Hundreds of dollars worth of Redwin synthetic dribbled out of my T3, past the oil seals.
Modern oils are not compatible with the oil seals used in classic cars. The seals will harden and leak. That's why they sell different engine oils for classic cars.
You cannot use a modern oil in your engine or gearbox without changing the seals and "O" rings.
Many mechanics are not aware of the problem, just as they don't know how to tune a carburettor or set points.
After forty-five years of restoring and maintaining old vehicles, I have learnt to leave things as they were intended by the designer. When components have become accustomed to a certain pattern of usage, they get set in their ways, and don't like change. Synthetic oil changes the parameters.
It has been a long and expensive learning curve. Pity I'm forgetting it all now ...
Roger Bayley