Ramy

I drove my 400 the first 1500 miles with premium only, averaged 24.7MPG on mix driving, mostly short hwy trips. The next 1500 miles or so I used regular and averaged 24.5MPG on the same type of driving, and no noticable performance difference. So my experience is that using premium will improve your MPG by about 1% but will cost you about 7% more. I see no reason to use premium.

Ramy

OK, for what it's worth... I have tried several tankfulls of 92 premium unleaded fuel, even tried a couple of 94 Super Unleaded Premium fuel... but, I get the BEST gas mileage using 87 Regular Unleaded Fuel.

I consistantly get 1.00 - 1.5 mpg better with Regular Unleaded, all things being equal. Most of my driving is 50% city and highway (during rush hour).

I average about 31 + or - 1mpg in the late spring, or early fall, and average about 33mpg + or - 1mpg in the hot summer months.

Everytime I ran with super unleaded, I could not attain the same mileage.

My Best ever recorded mileage with Regular Unleaded was 34+ mpg.

My Tire Pressure is about 37-38 psi with Good Year Eagle ResponsEdge.

I see no point in running Higher grades of fuel or spending more on the Octane, given the fact that it is NOT performance in terms of raw speed we are after but rather fuel economy. The HIGHer octane is designed for one thing, and that is to reduce detonation (usually occurs under heavy load). That being said, I do not see how higher octane can yield better fuel economy since we are not Loading up the engine.

Cheers,

MadloR

Can someone explains the sense for the factory default setting to automatically trap all passengers in the car until the gear is shift to "Park"?? I've seen it in other cars as well, but the whole paranoic approach where one can not even enter a destination while driving, and at the same time significantly increasing the risk of injury or death by trapping the passengers in case of an accident does not make any sense. I know the manual states that it automatically unlock in an accident, but would you trust it? It is not hard to imagine a situation where the gear is still on drive but passengers can not escape and outside helpers can not open the doors.

Of course the settings can be changed, but how many would be aware of it and bother asking the dealer to change the default settings?

Ramy

I had read somewhere the Coastaletech box would not work with the Mark Levinson + Nav option, as it keeps the nav data on a hard disk drive, rather than the DVD player in the rear. Can anyone verify that? If so, are there any other options available?

My Lockpick 3 basic working fine with my 2007 RX400 with the Mark Levinson DVD changer + Nav option and the latest NAV version (6 I believe). The only option my car does not have is the rear DVD but I doubt it matters.

Ramy

The more expensive ones which enables other functions are not suitable for the RX400h. They may be suitable for the 350, not sure. They are also a little harder to install. I found out the Lockpick 3 sifficient for me, if I want to make a phone call I can still use my phone for dialing and continue the conversation hands free.

Ramy

I got my Lockpick 3 Basic and installed it in less than 10 minutes. All you need to do is to lift the cover where the spare tire tools are in the trunk to expose the back of the DVD (not the DVD changer in the instrument panel). I could only lift it few inches but enough to access the plug to plug the lockpick in. A true plug and play, and it works exactly as advertised - canceling the I agree screen and enabling the destination input while driving. Definitely worth the $100 if you ever need to enter destination while you drive.

Ramy

But has anyone installed one yet if so how much trouble is it to install? I tried to get them to send me the installation instructions to see for myself but I never really got a straight answer.

Here's another thread, just below the one you clicked on.

http://us.lexusownersclub.com/forums/index...showtopic=39896

Enjoy! The search tool can be your friend. :P One of the responses shows a video. You can see it's not big deal.

Even for simple folk, like myself.

OK, I know the manual recommends against it, but in practice, if one runs out of fuel, can the 400 be driven slowly on electrical only for few miles to the next gas station, hopefully before running out of battery? I would like to hear from anyone who tried it, especially how far could they go and what happened when the engine tried to kick in.

Has anyone installed the Coastaletech lockpick3 in a 07 RX400h? I can't get an email response or anyone but their hired answering service. Anyone have any other solutions for hooking up a Microsoft Zune player to the factory nav screen or radio? Seems everything out there is for IPOD.

Sometimes it's because their email address . . . costaletech ... with an 'E' . . . gets inputted wrong, and they leave the e out. Another company owns the address without the e. At least that's what they told me.

I actually managed to talk to them on my third reply. Just call during business hours. I was told that the standard LockPick 3 is the only solution for the 2007 RX400 with CD changer. I haven't order one yet since I read inconsistant results on the forums, especially for it's functionality and instalation ease, but may give it a try.

Ramy

Other than burning a dual layer DVD has anyone found another way to disable the nav system lockout for ver 6.1 on the 2007 RX400h? I cannot believe that 1. it doesn't exist and 2. that someone has not been able to find it.

Yes, the topic has been written & rewritten in lots of other threads. The search tool is a wonderful thing. However, if you don't like making a DVD (and THIS IS the simplest way) you'll not like the other 2 methods either. (1) costaltech.com sells a nice over ride device (my choice) so you don't have to punch thru the over ride menus. (2) There are speed sensors on the wheels that (if disconected) will allow you to do the over ride ... but as I've said in prior threads, you didn't hear that from me.

True, there is overwhelming amount of info, but often contradicts. So here are my questions. I guess I wouldn't need to ask all those questions if costaltech web site wasn't that confusing...

1 - Will the Lockpick 3 basic works on a 2007 RX400 with the Mark Levingstone system (but no rear DVD player) and ver 6?

2 - Is it indeed just a simple plug and play in the trunck?

3 - Will it enable all the destination related functions?

4 - Does any of the other LockPicks which enable the phone will work with my car?

Thanks,

Ramy