I have a 72 F100 with an original 360. It looks as if it has never been rebuilt. What oil was originally recommended by Ford? What oil do you Recommend?

I live in South Central Texas and it's very hot.

 

[updated:LAST EDITED ON 14-Aug-02 AT 04:05 PM (EST)]I tried a few different things. The best for me oil pressure and general performance wise is 1 bottle Lucas oil and about 4 quarts Valvoline SAE30. It keeps the oil pressure up and since I started using the lucas, the truck uses a lot less oil too. Its a 69 360. I also noticed that when I used off brand oil, it made a huge impact on my oil pressure.
AW

I live in OK, not quite as hot...

 

SAE 30 should have been the recommended weight. 10W30 would be a good selection to use today. IMHO
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In the cool still quiet of night, you can hear chevies rusting away.

 

10W30 sounds perfect. Look for at least an SJ API rating.

You can read more at this link (ignore the "advertising" if you want)

http://www.chevron.com/prodserv/nafl/auto/content/motoroils.shtm#choose

Beware of snake oil products. Modern oils are designed to pass a series of stringent tests. Pouring in an additive may dilute and disturb that balance and make one property better while making others worse.

 

I know my truck didn't like 10w30 or 10W40, it used more oil and had lower oil pressure than it does with the Lucas and SAE30. I don't believe my engine has ever been rebuild either.
AW

 

I guess if your engine is worn and seals are leaking badly, a thicker oil will help. I had a Chevy S10 with the notoriously bad rear-main seal. I ran 20W-50 in the summer to slow the leakage and 5W-30 Mobil 1 in the winter (back in Minnesota) to make sure it started.