BLangeSC400 Posted March 10, 2006 Share Posted March 10, 2006 Ok, So I borrowed the wifes '99 LS to roll to Arizona. It was a run of about 300 miles. I averaged between 77-83 MPH according to the dash. Headwind I got 23-25 MPG. Tailwind, I got 26-28 mpg is that right? Man, my old 91 LS wasn't that tight on gas. Always a cool trip in an LS. What have you experienced, mileage vs speed? -bl Quote Link to comment Share on other sites More sharing options...
Threadcutter Posted March 10, 2006 Share Posted March 10, 2006 BLangeSC400: I averaged between 77-83 MPH according to the dash. Headwind I got 23-25 MPG. Tailwind, I got 26-28 mpg is that right? What have you experienced, mileage vs speed? I put on about 250 miles a day, & you're right in there as far as what I get............... I drive a lot of miles, but it's pretty enjoyable, all sacked out on/in "my living room sofa". I set my cruise for about 79 mph. My Auto X-Ray 6000 OBD II code reader tells me that my (& probably everyone's) speedo is lying........indicated (on the speedo) 79 - 80 mph, is actually 74 - 75 mph. At that speed, the "revenuers" pretty much leave me alone. Quote Link to comment Share on other sites More sharing options...
Canopy Posted March 11, 2006 Share Posted March 11, 2006 On my 2000 LS400 I get about 28 mpg when I set the cruise control at 76, without knowing about the tailwind. I'm quite pleased. Quote Link to comment Share on other sites More sharing options...
BLangeSC400 Posted March 11, 2006 Author Share Posted March 11, 2006 I didnt know the speedos were that far off. My daughter trailed us one trip, and said she was indicating different than we were. I blamed her Nissan speedo, but it actually matches up with what you said Threadcutter. I guess I'll check 'em out. Still very satisfied with the mileage. Quote Link to comment Share on other sites More sharing options...
j.barleycorn Posted March 11, 2006 Share Posted March 11, 2006 I average 26.8 MPG at 75 MPH on cruises of 350+ miles. Quote Link to comment Share on other sites More sharing options...
BLangeSC400 Posted March 11, 2006 Author Share Posted March 11, 2006 God bless Mr. Suzuki (Chief Eng of LS project). Quote Link to comment Share on other sites More sharing options...
Threadcutter Posted March 11, 2006 Share Posted March 11, 2006 BLange: I didnt know the speedos were that far off. My daughter trailed us one trip, and said she was indicating different than we were. I blamed her Nissan speedo, but it actually matches up with what you said Threadcutter. I guess I'll check 'em out. Still very satisfied with the mileage. After my post about using my OBDII tool, I remembered that I should be a "little" smarter...............I'm going to drag out my Garmin GPS. I'll let everyone know how that compares. It'll probably show less differential between speedo & actual, but I'll still bet there's a difference. Yeah, the mileage for a car this large is VERY Cool, isn't it?.......................... Quote Link to comment Share on other sites More sharing options...
blake918 Posted March 12, 2006 Share Posted March 12, 2006 After my post about using my OBDII tool, I remembered that I should be a "little" smarter...............I'm going to drag out my Garmin GPS. I'll let everyone know how that compares. It'll probably show less differential between speedo & actual, but I'll still bet there's a difference. Yeah, the mileage for a car this large is VERY Cool, isn't it?.......................... My Garmin consistantly shows that I am going 1 mph less than I actually am in every car I've had it in. I'd guess that the fault is on the Garmin since they are not 100% accurate (although, very close). I also have one of those car chips that collects data from the OBDII port, and it records the same speed that the car shows on the dash. I usually run 80-85mph except for when some cell phone talking, numb-skull is pitter-pattering in the left lane, and I always get in the 26mpg range, +/- a .5 - 1 mpg depending on how often I have to hit that little cancel switch on the steering wheel. The mileage is very good from the LS, but I think it would be so much better if we weren't in the 2200-3000 rpm range on the hwy. I wish Lexus would give us a real over drive; 2800 rpms on the hwy is a joke to me. It really irks me that a Corvette gets better gas mileage than my LS does since it turns 1500rpms going 75mph (I'm not looking for a debate, just an observation/rant.)...it can run circles around me and get better fuel economy, what's the deal with that?!?! I think I'll see low rpms in a LS the same day they rival the German's interior accomidations. LOL Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.