<VV> 25,000 mile oil change

[J R Read]

I found the answer to the "shelf life" in the crankcase question at Amsoil's 
web site:

PASTE:

SERVICE LIFE
AMSOIL Synthetic 10W-30 Motor Oil is recommended for extended drain 
intervals in unmodified(1), mechanically sound(2) gasoline fueled vehicles 
as follows:

  • Normal Service(3) – Up to 25,000 miles or one year, whichever comes 
first.

  • Severe Service(4) – Up to 15,000 miles or one year, whichever comes 
first.

END PASTE

Note the specific mention of gasoline fuel and also the 1 yr interval 
(without testing).

The trucker who went over 400,000 (diesel engine I assume) by testing the 
oil, what was the time period involved?  Do we know that answer?

I could not find a spot on the Amsoil website to tell me the ZDP levels.  If 
I simply missed it, please let me know how to find it.

Again, it is not my intention to pick on Amsoil (or you).  I'm simply 
looking for the facts in order to be able to make informed decisions about 
what oil I want to put in my 50ish year old Corvairs.

Later, JR
CCE CORSA CORVANANTICS SCG member
'61 Rampside Standard 4/110
'65 Monza Convertible 4/140
"Keep the Love Alive"


----- Original Message ----- 
From: <judynrandy at comcast.net>
To: <VirtualVairs at corvair.org>
Sent: Thursday, March 17, 2011 10:45 PM
Subject: <VV> 25,000 mile oil change


>
>
>
> Hi JR.

 That thing about changing oil every year is for petroleum based mineral 
oils. NOT synthetics. If it were me, I wouldn't worry about it. I mean, 
409,000 miles on the same oil and your concerned about shelf life?
>
> Sincerely,
>
> Randy (Cap'n) Hook
> '63 ragtop 84/pg
> '65 monza 4dr 110/pg
>