Use SAE 10w30.
The oil used in a slant six cylinder is typically 10w-30.
under the oil filter pointed down or towards the block
If your replacing a slant 6 with another slant 6 it will bolt right in.
Ruptured Fuel pump diaphram?
It holds 5 qts. with a new filter.
For maybe 5 Minutes. Then, you'll blow it up.
I BELIEVE that is 4.5 quarts with engine oil filter change on the 1966 Ford Mustang STRAIGHT 6 cylinder engine
For the V-6, it takes 5W30.
5w30
a slant 6 does in fact have a timing chain but it rarely ever wear out, break, or stretch, because of the durability of a slant 6.
Total surface area: (pi*36)+(pi*6*12) = 339.292 square units rounded to 3 decimal places. That is assuming that you meant the slant length and not the slant height because otherwise you would need to use Pythagoras' theorem to find the slant length.
10w3010w30