The math on those tire sizes works out to 9.2% difference from stock. Could you swap the wheels between the two trucks? Put the smaller ones on the one you use most?
Friday PM commute: 45.3mpg (SG2) 48.9mpg (FCD) tank ave. 41.7mpg Saturday trip out: 42.2mpg (SG2) 45.6mpg (FCD) tank ave. 41.7mpg Saturday trip back: 46.0mpg (SG2) 49.5mpg (FCD) tank ave. 41.8mpg
Note: For previous weeks, look [post="42532"]here[/post], and for later weeks, look [post="42534"]here[/post]. Late hit, but here's week 31 Data Dump... Key Column1Column2Column3Column4Column5Column6Column7Column8Column9Column10Column11Column12Column13#NotesStart tripStart mpgStart SoCEnd tripEnd mpgEnd SoCAvg mpgTrip mi°F50W carEr± mpg01Fri Kids to School 8/3318.159.95332.460.3570.8214.391.01.03.102Sun Errands332.460.35379.860.3460.3047.486.0?0.803Sun Errands379.860.34383.360.3460.303.581.0?11.204Sun Errands383.360.34394.660.3460.3011.393.0?3.5 Column1Column2Column3Column4Column5Column6Column7Column8Column9Column10Weeks statsCurrent city64.44% Goal EPA_mpg for current city/hwy split56.46 mpg Current hwy35.56% Current_mpg for current city/hwy split62.02 mpgDifference (PoE)109.9 % Key 11011011