MrBruin09

Is the Scanner option only available to do at the dealership?

lexus114

I agree...got a little heated for a bit, But I agree. Sorry if I came on a little strong there CD.

lexus114

My advice is to go buy a scanner, they pay for themselves in no time. Meaning if your light comes on, or your friends check engine light comes on etc.The answer to your question re; clearing the ecm Well, you can clear it by disconnecting the neg. batt. terminal for a few minutes. But you will loose your automatic settings on your power window`s etc. And, believe it or not, especially in Nissan`s, it doesnt always clear all the information from the computer. Btw, you can get a decent scanner from Auto-Zone, A code reader is okay to have, but the scanner is the way to go.

MrBruin09

Well definitely do that. I did reset my ecu this morning by removing the negative battery terminal. I never had pre-set radio settings at all, so that didn't bother me at all.

lexus114

How does your sunroof/window`s/rear hatch work now? If they didnt loose any memory, then your one of the lucky ones.

MrBruin09

I am not really sure, since I haven't used the Sun roof in over 1 year. The rear windows need to be re-programmed, and how am I suppose re-program the rear hatch?

lexus114

I cant remember off hand, but if you have your manual, it`s in there on how to reprogram it.

jmonkie76

Everyone talked about 91 and 87. I mentioned here before that I use 89, and 91 when I can find a good deal. I'm in CA so unsure what the specs are, but I have to wonder if using 89 will in time affect my cat as lexus114 insists when using reg grade.

Any thoughts appreciated.

koric

iTrader: (1)

How many miles do you drive per month? 89 and 91 is only a 10 cents difference from where I'm from and at $1.70 difference per full tank, it gives me peace of mind that my Lexus is running at its optimal performance. I personally fill up every week.

lexus114

I dont think the 89 octane will affect the RX that much,and I believe it doesnt even pull that much timing compared to the 87 octane. However,when I tested the 87,and 89, I noticed it still performs best on premium. Not much difference in mpg on 89,but definitely the most power on premium. I need all the horses due to the friggin hill`s/Mountains around here. You on the other hand may be fine with 89.

jmonkie76

Thanks koric and lexus114 for your input. I'm in SF so steep hills are also an issue for me. This is my first v6 AWD engine, so I never used to look at the cost per grade since all I needed before was regular.

I haven't really noticed a difference in power, but at the same time, I'm not exactly sure how or where to look to measuring that other than dyno (which is out of my means).

cdnewton

This has been a really good discussion thread and I do want to note one thing.

I keep in touch with an acquaintance that is a Toyota Master Diagnostic Tech/ASE Master/L-1. As I am sure you got from this thread, I run 85 octane (87 equivalent at normal altitude). I contacted him to make sure I wasn't doing any damage to the catalytic converter in our RX. His reply was as follows:

"The 3.3L V6 was engineered to run 91, so optimum performance will occur with 91. But its also designed to work on 87 octane, but maybe a performance loss and you may get better overall mileage with 91. But, no harm to the converters will occur by running 87 octane; no damage at all."

MerlinT

Same with my Toyota Highlander 2002 (V6 - 3.0L), but I got better milleage with 91 (at least 10%). So it was no brainer for me to fill it up with 91

MerlinT

That's the spirit, at least, for a Lexus driver

Isentropic

I have been using 87 octane (regular) gas for over 3 years on my RX350. I haven't had any problems so far.

I though these were the same engines that were used in Highlanders? So can't they run on regular, instead of premium?