Joined: May 30, 2014 Posts: 3465 Location: Texas Hill Country
Posted: Mon Jun 25, 2018 8:54 pm Post subject:
Ralph,
You must have read some of the same articles I did.
I also read of recommendations of higher zinc during break-in,
but also that today’s high detergent oils tend to wash the zinc
off the wear surfaces sufficient to negate the higher concentrations
in the oil.
Joined: Jun 27, 2011 Posts: 262 Location: "Thumb" of Michigan
Posted: Tue Jun 26, 2018 7:48 am Post subject: Geez! No more T3
What an informative thread. I've used T3 for years so it's cancellation is not good news.
I took the liberty of emailing Shell Technical support and asked the question whether T4 lacked the amount of ZDDP that T3 featured. The answer I got was that Rotella still had plenty of Zinc and was the best mineral oil for older engines. They also sent me a spec sheet, an excerpt of which I've attached.
Tim
_________________ Tim Juhl
1952 M38A1
1946 Aeronca L16A Army Liaison Aircraft
Joined: May 14, 2013 Posts: 201 Location: Between Crosslake and Emily, Minnesota
Posted: Tue Jun 26, 2018 12:29 pm Post subject:
Thanks Tim. That is the kind of information I was looking for. I'll switch back to Rotella for my next oil change. _________________ Steve Stark - 1955 M38A1 MD #85388
Member - MVPA #35153
Member - Red Bull Historic Military Vehicle Association
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