RE: {Chrysler 300} Best oil for '61 413

["dplotkin@xxxxxxxxxxxxxxxxxxxxxxxxx" <dplotkin@xxxxxxxxxxxxxxxxxxxxxxxxx>]

Big opinion generator. Here's mine:

 

Any oil with an API Donut symbol/starburst is good oil. Shell Rotella 15-40 is such an oil, and it is highly endorsed by the old Corvette community who are as pointy-headed and careful as car guys come. It has sufficient zinc for sliding surface engines such as ours. 

 

However! Mobil 1 just introduced a 10W30 full synthetic for use in sliding surface old car motors. I put 6 quarts in my F two weeks ago. 

 

The balance of my rigs use Penngrade 10W40 out of habit. Its good oil too, but no API certification. I'll migrate them all to Mobil 1. I prefer 10W40 but for now only available in 10W30. 

 

Danny Plotkin

 

 

Daniel D. Plotkin

Daniel Plotkin & Associates LLC

54 Capri Drive

East Longmeadow, Massachusetts 01028

413 237 9629

dplotkin@xxxxxxxxxxxxxxxxxxxxxxxxx

 

 

 

 

 

 

-----Original Message-----
From: "mguarneri via Chrysler 300 Club International" <chrysler-300-club-international@xxxxxxxxxxxxxxxx>
Sent: Thursday, May 7, 2026 12:42pm
To: chrysler-300-club-international@xxxxxxxxxxxxxxxx
Subject: {Chrysler 300} Best oil for '61 413

Just got back north for the spring/summer/fall and want to change the oil in my G.  However time has a hold on me and I can't recall what oil viscosity to use (normal outside temp I run is 55-90 degrees), and regular or synthetic.

 

I promise to write it down this time!....thanks...John 

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