Re: ZDDP Off Shoot, Oil change interval

I’m reading these posts with interest, and my view is I change the oil in my ‘65 at regular intervals, (5-30, plus a ZDDP additive). My theory being oil changes are cheap compared to potential engine damage. My $.02 worth..............

From: Eric Sturgis

Sent: Tuesday, December 16, 2014 8:18 PM

To: Chrysler Group

Subject: Re: ZDDP Off Shoot, Oil change interval

I can tell you that a NEW car states that oil has to be changed

1. at least once per year

2. or no more than 10k miles....7k is better but 10k is OK

3. or the "change oil" light comes on.

New cars are made of different metals than our cars, closer tolerances and less blow by and other pollutants. They can get by with longer distance between oil changes.

But even my 1962 owners manual states change the motor oil at least 1 time per year. If you take your car out on a good run (say 30 miles at freeway speeds nice sunny day), burn a tank a fuel out of it at least once a year I bet you will be fine with annual oil changes.

Of course sitting out in the cold, and rain and snow will let more water build up in the crankcase than if it's parked in a nice dry garage somewhere.

Eric Sturgis

Tacoma, WA

1962 Chrysler Newport 2 door HT in Coral Gray

2014 Chrysler 300 3.6L in Jazz Blue

2014 Dodge Charger R/T 5.7L (ya it's a HEMI) in Header Orange

On Tue, Dec 16, 2014 at 5:00 PM, Michael LeFevre <493mike@xxxxxxxxx> wrote:

Hi Nico,

New oils will last far longer than those formulas of yesteryears. It makes a difference as to how warm the oil gets when you drive. It needs to get hot enough to boil out any accumulated water. Oil + water seems to make acids that eat metal (your engine internals) so you should make sure you're not feeding their habit! Being somewhat frugal I change every other year. I don't put many miles on per year but those I do are enough to really warm things up! Tires too! I'm using Royal Purple currently.

Mike LeFevre

On Tue, Dec 16, 2014 at 5:20 PM, Nico Over <nover2@xxxxxxxxxxx> wrote:
All, been reading these threads with great enjoyment to the knowledge that is out there. Need to expand this thread to Oil change intervals. As I winter in Florida to work on my 65 Bel vert, it occurs to me that my other 62-65's sit for almost 6 months and am wondering should i change my oil when I move back north to Virginia. Currently have been using Rotella T-6 synthetic but from previous posts that may now be a no-no, so do I change syn oil every 6 months just because the motor sat for 6 months. members from the northern states may have a good insight to my question. Thanks in advance.
Nico Over
65 Bell II vert project

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