We spent the holiday near Dallas this past week. I am convinced that the Texans sent their good drivers up here but thats a whole different story!
We took the 2011 rx450h down and were getting between 27 and 31 MPGs on mid grade fuel. We filled up the last tank just north of Amarillo with premium and suddenly the MPGs were low 20s. The entire time were drove around Dallas was this way. No change in driving technique. The only difference was the octane and elevation. I read on several different places when we bought this car that we could use mid grade at higher elevations, like where we live, but needed to use premium when at lower elevations. This is why I switched octane on the last fill up.
We ran though 3/4 of a tank while down there and I decided to go back to mid on the next tank and there after. Our trip back yesterday was the same low 20s until we filled up just outside of Raton. That was the turning point where the MPGs started to climb again.
All of new Mexico and most of the Texas driving on the way down we had good mileage. On the way back, all of that section of the trip was not good mileage. Does anyone have an explanation for this? There was an entire tank of gas expended in this section of the trip with an 8 to 9 MPG difference.
We took the 2011 rx450h down and were getting between 27 and 31 MPGs on mid grade fuel. We filled up the last tank just north of Amarillo with premium and suddenly the MPGs were low 20s. The entire time were drove around Dallas was this way. No change in driving technique. The only difference was the octane and elevation. I read on several different places when we bought this car that we could use mid grade at higher elevations, like where we live, but needed to use premium when at lower elevations. This is why I switched octane on the last fill up.
We ran though 3/4 of a tank while down there and I decided to go back to mid on the next tank and there after. Our trip back yesterday was the same low 20s until we filled up just outside of Raton. That was the turning point where the MPGs started to climb again.
All of new Mexico and most of the Texas driving on the way down we had good mileage. On the way back, all of that section of the trip was not good mileage. Does anyone have an explanation for this? There was an entire tank of gas expended in this section of the trip with an 8 to 9 MPG difference.