I am with ND on this one. The manual clearly states approx 5 qts plus 1 qt with filter change. So proper level is over 5qts. My all original '65 has to have 6 qts to be at full mark! many different dipsticks and tubes have been used so its easy to be off if either has been changed.

ND, the vertical oil adapter was replaced with truck one because the filter WOULD NOT clear the frame. Not even close as it hangs into frame at least 1 1/4"

 

Wow...are some REALLY still debating this...

I have a 68 owners manual among my collection...and just for the heck of it I looked to see what it said about refill amounts/crankcase capacities..

For ALL gasoline engines in the F100-350 trucks EXCEPT the 240-6, the owners manual says the same thing...5 quart capacity, add 1 with filter change.. Page 57 for those interested...and one of my manuals happens to have a nice lil pen asterisk next to the footnote of add a quart with filter change.


- cs65

 

NumberDummy did your '65 have a front or a rear sump pan? I know the rear sump pans hold more than front sumps (IDK how much). On my all original, never been apart 352, I put 6.5 quarts in (way over full) and it will be on add in 500 miles (the assemblers did a poor job at sealing the rear of the intake; oil literally runs out).

 

Mine is a front sump as i recall...as to the oil flow..theres engines...among others...have a knack for pushing the front and/or real intake gaskets out...when they do get changed typically a generous wad of silicone is advised at the 4 corners...


- cs65

 

https://www.ford-trucks.com/forums/1...r-fe-hold.html

 

I noticed while changing the timing chain, that the oil pump p/u was 1/2 (little more) way covered with oil and I think I put 6qts in (been a while since I've been working on it).

 

Man, that poor 🐴 horse!

One thing I didn't see mentioned it may be somebody who installed six (6) quarts and started fogging the neighborhood has an engine with a lot of internal sludge buildup.

Neglected engines, engines that have never had an overhaul or rebuild, back in the days especially of leaded gasoline and dirt cheap re-refined paraffin motor oil etc etc would have an inch of heavy sludge buildup in the pan. That could easily explain why a particular engine won't take 6 quarts.