Reporting back after a 1,600 mile RV road trip.
The plug and COP change has really helped this engine runs smooth. Smoother then I ever remember. However I cannot tell any fuel MPG changes from the plug change. We had approx 600 miles of camping before the trip and saw no gains.
I did add a K & N air filter before the trip. I did notice a 0.5 to 0.75 MPH increase since adding. Or putting me back to what I use to get now about 4 years ago. The amount of ethanol in the gas here locally may be playing a bigger factor with this engine's MPG.
The truck performed flawlessly. Cannot say the same for trailer tires but that is another post. Now have 2 of them DOA.
John
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Current Sunlines: 2004 T310SR, 2004 T1950, 2004 T2475, 2007 T2499, 2004 T317SR
Prior Sunlines: 2004 T2499 - Fern Blue
2005 Ford F350 Lariat, 6.8L V10 W/ 4.10 rear axle, CC, Short Bed, SRW. Reese HP trunnion bar hitch W/ HP DC
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