Have 1955 F250 223 I6 cylinder what type of oil should I put in it?

 

YOU HAVE TO PUT OIL IN THESE THINGS? OH CRAP!

What type of oil does your "Operators Manual" tell you to put in it?

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Your location makes a diff as well.

Ok I'll give in just this once and tell you what it says:

SAE 30 for temps above +32 degrees F;
SAE 20 or 20W for temps above +10 degrees F
SAE 10 for temps above -10 degrees F
SAE 5 for temps below -10 degrees F

If you have over 100K miles on it I might even go with SAE 40.

 

Yep, the sticker in my glove box says the same thing... course there might be a "better" oil for it now, I just put SAE 30 myself.

 

Since it is a flat tappet engine that needs ZDDP in the oil to keep from flattening the cam lobes, may I recommend Valvoline Racing Oil, which still has sufficient ZDDP in it. Other manufactures have radically dropped the percentage of ZDDP from their oils because isn't good for Cat Converters. B/B Ford turned me on to this stuff and it works great.

 

I've been putting DELO 400 in my 37 Airflow. Was told that's the oil I should use by the old timer that worked on it and has several Airflows of his own. It also needs ZDDP.