So my son the genius didn't keep up with checking the oil in the Dakota and it was below the 'add' line on the stick today when I checked after I noticed it sounded funny when he started it. Took 1 & 2/3 quarts to bring it up to the full mark. 5 qt capacity for the engine. How tolerant are the old Mopar 318's of low oil? Damage done? Oil is Pennzoil YB 10W30.