THE STATS

Compression specs for this engine:

Standard 179 psi @ 300 rpm
Minimum 151 psi @ 300 rpm

READINGS AT 121,893 MILES (PREAUTO-RX)

Compression:
Cylinder 1-117psi
Cylinder 2-120psi
Cylinder 3-117psi
Cylinder 4-119psi

Idle Oil Pressure:
16psi@680rpm@190degrees fahrenheit (coolant temp)

Ambient Temp:
97 degrees

Hot Idle RPM (A/C off):
680rpm

 

READINGS AT 122,488 MILES (~1500 miles w/Auto-Rx)

Compression:
Cylinder 1-128psi +11psi
Cylinder 2-125psi + 5psi
Cylinder 3-127psi +10psi
Cylinder 4-126psi +7 psi

Oil pressure and idle speed tests were not performed due to idle speed fluctuations that appeared since the test started

 

READINGS AT 125,324 MILES (~3500 miles w/Auto-Rx)

Compression:
Cylinder 1-139psi +22psi
Cylinder 2-140psi +20psi
Cylinder 3-140psi +23psi
Cylinder 4-141psi +22psi

Idle Oil Pressure:
19psi@710rpm@180degrees fahrenheit (coolant temp)

Ambient Temp:
~75 degrees

Hot Idle RPM (A/C off):
710rpm

 

READINGS AT 126,804 MILES (~5000 miles w/Auto-Rx)

Compression:
Cylinder 1-161psi +44psi
Cylinder 2-160psi +40psi
Cylinder 3-149psi +32psi
Cylinder 4-166psi +47psi

Idle Oil Pressure:
17psi@700rpm@185degrees fahrenheit (coolant temp)

Ambient Temp:
~85 degrees

Hot Idle RPM (A/C off):
700rpm

 

READINGS AT 129,136 MILES (~7000 miles w/Auto-Rx)

Compression:
Cylinder 1-170psi +53psi
Cylinder 2-168psi +48psi
Cylinder 3-158psi +41psi
Cylinder 4-173psi +54psi

Idle Oil Pressure:
18psi@730rpm@180degrees fahrenheit (coolant temp)

Ambient Temp:
~70 degrees

Hot Idle RPM (A/C off):
730rpm