Re: [Chrysler300] oil [Synthetic Oil]

[Tom Chvapil <tchvapil@xxxxxxxxxxxxx>]

OK, hopefully this will help a bit. 
I just had my 392 completely rebuilt, with a new performance Isky cam, and both the machine shop, as well as the Isky manufacturer gave the following instructions for both initial break in, as well as subsequent oil changes:

" Isky recommends the use of only the following motor oils for maximum cam lobe and lifter protection BEFORE and AFTER the break-in period because they are the only conventional mineral based oils with generous levels of the zinc/phosphorus additive package:
 
* Brad Penn Penn-Grade 1 (The very best of all in our opinion.....)

* Pennzoil 'GTP' Racing oil (Excellent-Do not confuse with regular grade Pennzoil!)

* Valvoline Racing Oil (Excellent-Do not confuse with regular grade Valvoline or Valvoline VR-1)

**We believe the Brad-Penn product (FORMERLY known as Kendall GT-1) to be superior to all other oils.....**

If you DO NOT USE one of the above oil, the next best approach is to supplement other common mineral based oils with Engine Oil Supplement  from any GM dealership (part #1052367, 16 oz.)
My machine shop indicated that they prefer ZDDP.......

**Special note regarding Synthetic Oils**

Isky doesn't recommend the use of synthetic oils with any flat-tappet cams, especially during break-in. If you must use synthetic oil, AFTER break in period, there are only 2 brands we feel comfortable recommending. Amzoil (Red) Racing Oil and Joe Gibbs Performance Racing Oil."
Other synthetics, especially those with very low viscosity index Numbers (i.e. 0w-15, 5w-20, etc) have very low film strength and are not designed, nor should they be used in any flat-tappet cam installation.

I have retyped this info from the instruction packet I was given by my machine shop and Iskycams.

Makes sense to me, especially since my shop has no stake in endorsing any of the above mentioned products.



Tom Chvapil
Tucson,Az
tchvapil@xxxxxxxxxxxxx




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