Was running Mobil 1 10W-30 in my 3.8L V6 Camaro.
Input = 5quarts 10W-30 with PF52 Long Filter Spec (used on the 4.3L V6)
Output = 4.2quarts 10W-30... after draining the filter
No spills.
Now I run Valvoline Maxlife 10W-30:
Input = 5quarts 10W-30 with PF52 Long Filter Spec
Output = 5quarts to the brim!!
Not to mention the engine is significantly quieter cold or warm, and my fuel economy has not changed (its still good).
This is also on a 3,000 mile oil interval - which I might change in the future but for right now at $1.88/quart 3,000 miles is plenty cost effective for me.
Input = 5quarts 10W-30 with PF52 Long Filter Spec (used on the 4.3L V6)
Output = 4.2quarts 10W-30... after draining the filter
Now I run Valvoline Maxlife 10W-30:
Input = 5quarts 10W-30 with PF52 Long Filter Spec
Output = 5quarts to the brim!!
Not to mention the engine is significantly quieter cold or warm, and my fuel economy has not changed (its still good).