FORD 2011 F-550 v.4 - Manual (Page 411)

ENGINE DATA
Engine 6.2L V8 engine 6.8L V10 engine
Cubic inches 378 413
Required fuel Minimum 87 octane Minimum 87 octane
Firing order 1-3-7-2-6-5-4-8 1-6-5-10-2-7-3-8-4-9
Spark plug gap
0.039–0.043 inch
(1.0–1.1mm) 0.039–0.043 inch
(1.0–1.1mm)
Ignition system Coil on plug Coil on plug
Compression ratio 9.8:1 9.2:1
Engine drivebelt routing
6.2L V8 engine
6.8L V10 engine with A/C
Maintenance and Specifications
411
2011 F-250/350/450/550 (f23)
Owners Guide, 4th Printing
USA (fus)