So 1st post up-dated with last weeks home trip:
Trip 1 Cornwall - NE, BP Ultimate 75.5mpg Average | 58mph Average (65mph cruising) | 7am Start, traffic clear 15-22degc No A/C, little rain.
Trip 2 NE - Cornwall, Sainsburys 70.6mpg Average | 48mph Average (65mph cruising) | 11am Start, heavy traffic, 15-22degc No A/C, heavy rain.
Trip 3 Cornwall - NE, Tesco 75.0mpg Average | 58mph Average (65mph cruising) | 7am Start, traffic clear 15-22degc No A/C, little rain.
Trip 4 NE - Cornwall, Esso Premium 73.7mpg, Average | 48mph Average (65mph cruising) | 11am Start, heavy traffic, 15-25degc 2hrs A/C nice weather.
So Trips 1 and 3 were very similar, speed weather and gave very similar MPG 75 and 75.5mpg.
Trips 2 and 4 were also very similar, got stuck in traffic just as much as the previous week, and the couple of hours of heavy rain were swapped for a couple of hours of bright sunshine and the AC turned on (now that it works
) but different mpg 70.6 V 73.6mpg.
So either the rain has a bigger impact then the AC or the Esso premium is better then the Sainsburys budget?
I am starting to think that premium is worth 2-3mpg more then supermarket with the exception of Tesco that performs like a premium fuel.
Early days though, I'm back up and down next week so will do another comparison, maybe Asda Budget and Shell Premium.