Just reporting an unusual trip and MPG results:
Total trip mileage: 255 miles RT - all highway/non-commute 75-80mph. Destination at 2000FASL and most driving is at or near sea level. Temp 65-78F
Clear, dry road/weather conditions. AC off. TP to spec; fuel: Union 76 HiPerf. 91 Oct
Outbound MPG: 27.67mpg Inbound: 33.69mpg
I've done a similar trip and could only wring out 24mpg. The only change was switching from Mobil 1 15w-50 to Mobil 1 0w-40(EuroBlend). I seriously doubt the oil weight change had such a dramatic impact on MPG.
Total trip mileage: 255 miles RT - all highway/non-commute 75-80mph. Destination at 2000FASL and most driving is at or near sea level. Temp 65-78F
Clear, dry road/weather conditions. AC off. TP to spec; fuel: Union 76 HiPerf. 91 Oct
Outbound MPG: 27.67mpg Inbound: 33.69mpg
I've done a similar trip and could only wring out 24mpg. The only change was switching from Mobil 1 15w-50 to Mobil 1 0w-40(EuroBlend). I seriously doubt the oil weight change had such a dramatic impact on MPG.