According to my manual on the '97 RSTD it shows oil quantity as follows:
Total amount: 4.6 US qt.
Periodic oil change:
3.7 US Qt
With Oil filter replacement:
3.9 US qt.
Now, If the manual shows 3.9 quarts required if the filter is changed how does that add up to 4.6 qts total?
But what I really need to know is, if I change the filter, how many quarts should I put in? Secondly, if I don't change the filter this time, how many quarts should I put in?