2006 Sienna Highway Gas Mileage
I have a 2006 Sienna and I owned a 98 Sienna before that. The 2006 gets noticeably better highway gas mileage. I think it is due to the combination of the larger engine (3.3 liter vs. 3.0) and the five speed transmission (vs. four speed) that allows the 2006 to cruise along at lower RPMs than the 98 did. I drive 70-75 MPH and average 25-26 MPG with the A/C on in 80-90 degree weather. Best ever was 28 MPG driving with A/C off in 60-70 degree temperatures from Arlington, VA to Boston; 465 miles without refueling. City mileage is noticeably lower, but seems better than my 94 Camry V6.
Have you tried adding BG 44K to clean out your fuel injectors? I use it once a year, about every 15K miles, and it makes a real difference - especially in my old Camry's mileage and performance.
I have a 2006 Sienna and I owned a 98 Sienna before that. The 2006 gets noticeably better highway gas mileage. I think it is due to the combination of the larger engine (3.3 liter vs. 3.0) and the five speed transmission (vs. four speed) that allows the 2006 to cruise along at lower RPMs than the 98 did. I drive 70-75 MPH and average 25-26 MPG with the A/C on in 80-90 degree weather. Best ever was 28 MPG driving with A/C off in 60-70 degree temperatures from Arlington, VA to Boston; 465 miles without refueling. City mileage is noticeably lower, but seems better than my 94 Camry V6.
Have you tried adding BG 44K to clean out your fuel injectors? I use it once a year, about every 15K miles, and it makes a real difference - especially in my old Camry's mileage and performance.
