The 3RX Gas Mileage Thread
10-13-14, 04:43 AM
#496
Driver School Candidate
It looks like any type of roof rack can affect gas mileage. This experiment with just a normal roof rack affect mpg by 12%. When a bike was added it went up to 27%.
http://auto.howstuffworks.com/fuel-e...affect-mgp.htm
10-20-14, 12:54 PM
#499
No, I don't play soccer!
10-25-14, 04:52 AM
#502
Driver School Candidate
Join Date: Oct 2014
Location: Kentucky
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What grade gas is recommended? I have a 2010 RX 350? I just bought my Lexus and I haven't gotten gas yet. I need to be prepared for the first fill up! Do I use regular, medium or premium?
Thanks!
Thanks!
10-25-14, 05:29 AM
#503
2010 recommends 91 octane. You could probably run 87 which should give you slightly Less power. 2012 and later they recommend 87 but it has 270hp vs 275. So you should be able to run 87 too, computer should make the adjustments.
10-26-14, 08:44 AM
#506
Pole Position
33 mpg!
Ok, this isn't completely the whole story. But I did an experiment this morning. Took my 2014 RX350 with AWD on a 50 mile stretch of the Pa. Turnpike in Western PA. The road is basically flat with a few grades and curves. I reset my MPG computer into the toll booth and read it just as I exited about 50 miles later. I kept a fairly steady speed of 58MPH and was careful not to accelerate or decelerate too much too fast. Good weather with no need for A/C. At the end of the trip, the computer said "32.9MPG".
Now I realize this was a controlled experiment under almost ideal circumstances and with driving that would not normally be so sedate. Nevertheless, for a vehicle as massive as the RX, with AWD and on regular (87) gasoline, , to get 33MPG is amazing to me. For comparison/reference, I did a similar experiment with my 2009 LS460AWD and got about 1MPG less using 89 octane (even though the car really requires 91).
I'm not sure if this matters to anyone (even me!) really, but I thought I'd share my results.
Now I realize this was a controlled experiment under almost ideal circumstances and with driving that would not normally be so sedate. Nevertheless, for a vehicle as massive as the RX, with AWD and on regular (87) gasoline, , to get 33MPG is amazing to me. For comparison/reference, I did a similar experiment with my 2009 LS460AWD and got about 1MPG less using 89 octane (even though the car really requires 91).
I'm not sure if this matters to anyone (even me!) really, but I thought I'd share my results.
10-26-14, 09:46 AM
#507
I just heard on the news that a section of backed up traffic on the PA turnpike was starting to clear. There was some story abut a 'hypermiler' LOL. Seriously, good job 
. But your right, in the real world folks don't drive that way. You even beat my (h) which is hovering around 30mpg since delivery over 5 years ago 
.
. But your right, in the real world folks don't drive that way. You even beat my (h) which is hovering around 30mpg since delivery over 5 years ago .Ok, this isn't completely the whole story. But I did an experiment this morning. Took my 2014 RX350 with AWD on a 50 mile stretch of the Pa. Turnpike in Western PA. The road is basically flat with a few grades and curves. I reset my MPG computer into the toll booth and read it just as I exited about 50 miles later. I kept a fairly steady speed of 58MPH and was careful not to accelerate or decelerate too much too fast. Good weather with no need for A/C. At the end of the trip, the computer said "32.9MPG".
Now I realize this was a controlled experiment under almost ideal circumstances and with driving that would not normally be so sedate. Nevertheless, for a vehicle as massive as the RX, with AWD and on regular (87) gasoline, , to get 33MPG is amazing to me. For comparison/reference, I did a similar experiment with my 2009 LS460AWD and got about 1MPG less using 89 octane (even though the car really requires 91).
I'm not sure if this matters to anyone (even me!) really, but I thought I'd share my results.
Now I realize this was a controlled experiment under almost ideal circumstances and with driving that would not normally be so sedate. Nevertheless, for a vehicle as massive as the RX, with AWD and on regular (87) gasoline, , to get 33MPG is amazing to me. For comparison/reference, I did a similar experiment with my 2009 LS460AWD and got about 1MPG less using 89 octane (even though the car really requires 91).
I'm not sure if this matters to anyone (even me!) really, but I thought I'd share my results.
10-26-14, 09:52 AM
#508
Pole Position
Actually FWIW, when I did the test on my LS, it was near Philly. I wanted to go 55, but I really was causing traffic in that 70 MPH zone. So I compromised and went 60, and still had people blowing by me.
10-26-14, 03:05 PM
#509
Just finished a 1100 mile trip on my new 2015 AWD RX350 on Highway 66 (currently Interstate 40) average speed 70mph and top speed for cruising is 75mph. Got 22mpg and I'm happy with that at "highway" speed on a V-6 engine with automatic and AWD.
10-26-14, 03:30 PM
#510
Pole Position
I'll bet that improves as the vehicle breaks in