However, a generally accepted *ballpark* range for a healthy 3.8L V6 in a 2000 Mustang is 130-170 PSI per cylinder. You should always see a relatively consistent reading across all six cylinders; significant variations (more than 15-20 PSI difference between the highest and lowest readings) indicate potential problems.
Crucially: This is just an estimate. You should consult your owner's manual or a reputable repair manual specific to your vehicle's year and engine for the most accurate compression test specifications. Those manuals will give you the ideal range and acceptable variance for your engine. Simply looking up "2000 Mustang 3.8L compression test" on a site like Haynes.com or Chilton.com may provide the specifics you need.
