flowrider

iTrader: (9)

^^^^What are you so POd about If someone explained the search function, maybe the OP would have a better experience. I was just stating a fact. If you don't approve - well

Lou

racingt

87 since new, runs strong!

WAES300

They recommend regular in the 2011's now I believe, the power is rated at a little less.

Macklin

I'm not PO'd Lou. It was just the way you said it. Came off as condesending. Believe me I know as I'm guilty of this all too often.

A more likeable response would have been to simply inform them of a very handy search function for gaining info on such a common question.

ingoodtime

My wifes 07 seems to run better on premium.

rx300mm

I have been using 87 octane for last 2 yrs, have not noticed any difference in driving.

rikkus256

been using 87 since I bought the car. I tested 91 and 87 and I didn't notice any MPG difference.

raviola4

We bought our CPO 07 ES350 Oct 09. Dealer indicated at the time they only use Regular gas . Using ever since, and no problems. 23 around local and 32-33 mpg on trips. Surprising the good mileage with that engine etc. but no complaints here.

CompuMan

In several places, there has been an ongoing debate about what octane we should be using in our ES350's. Mine is a 2008 ES350 ultra. I decided to look at the engine specs for my ES350 and compare them to the same year Camry engine specs.
My owners manual says that my ES350 should use 91 octane gasoline. But, the comparable Camry model with what seems to be the same engine says that they can use 87 octane gasoline. So here is my research:

Camry:
2011 Technical Specs
Standard Engine 3.5L V6
Standard Transmission 6 Speed Automatic
Cylinders 6
Horsepower @RPM 268@6200
Fuel Economy Cty/Hwy 19/27
Combined Fuel Economy 22
EPA Class Mid-Size
Number of Valves 24
Torque @RPM N/A
Fuel Type System Gas Engine / Sequential Electronic Fuel Injected,
Sequential Port Fuel Injected Sequential, Multi-Port Fuel Injected
Turbo (Yes/No) No
Overdrive Transmission Yes
Battery Output N/A
Compression 10.8:1

Displacement 3458/211

Bore X Stroke 3.70x3.27

5-speed ECT-i automatic transmission w/OD
Type: 6-speed automatic
Ratios: 3.30, 1.90, 1.42, 1.00, 0.71, 0.61
Final Drive: 3.69



ES350:
2008 Technical specs
Standard Engine 3.5L V6
Standard Transmission 6 Speed Automatic
Cylinders 6

Horsepower @RPM 272@6200

Fuel Economy Cty/Hwy 19/27
Combined Fuel Economy 22
EPA Class Mid-Size
Number of Valves 24
Torque @RPM N/A
Fuel Type System Gas Engine / Sequential Electronic Fuel Injected,
Sequential Port Fuel Injected Sequential, Multi-Port Fuel Injected
Turbo (Yes/No) No
Overdrive Transmission Yes
Battery Output N/A
Compression 10.8:1

Displacement 3441/210

Bore X Stroke 3.70x3.27


6-speed automatic electronically controlled transmission
w/intelligence (ECT-i)-inc: sequential-shift
Type: 6-speed automatic
Ratios: 3.30, 1.90, 1.42, 1.00, 0.71, 0.61
Final Drive: 3.69

The only difference seems to be in the displacement calculations. Please note that the compression ratio is identical. I have always thought that a 10.something compression ratio would require high octane gasoline.
I have Not decided to switch to regular (87 octane) yet, but I am mixing 1/2 tank of 87 Octane with 1/2 tank of 93 octane (=90 octane).
What are your thoughts and/or comments?????

ratucker3

I have a friend who has been using 87 octane in an older LS400 with 272,000 miles on the odometer and no problems.........

jagtoes

I run 87 in my 2010. No need to overkill with hi-test.

garsarno

Just filled up with 87 octane after years of using 91+. I can honestly say, I feel no difference in power. Will check mileage rate next week to see if there is a difference. There was not much of 91 in the tank, I think the car took 17.045 gallons of gas in this fill up of regular.

lgb0250

With gas prices what they are now and where they will be going shortly, why would anyone use something that is not needed? Just befuddles me.

Ever since the dealers first tank was close to empty I've been using 87 and have had absolutely no problems whatsoever in my 1.5yr old 2010. You lose a couple of hp by using the 87 and that's it. I didn't buy mine to get to the next light the quickest so it really doesn't matter to me.

jerfitz

As of February, 2011 in our 2007 ES350 I have been using 87 octane regular gas since it was new in 2007 and so far no problems and nothing noticably different.

LexPaul

This is an argument that could go on until the 'end of time' and never be fully resolved. Let's face it some people will always go with what is recommended by the manufacturer for peace of mind, others will look at the price of gas vs. performance and ignore the manufacturers recommendations. Who's right? I don't know and don't care, I'm only responsible for taking car of my own car. My vote is to go with what is recommended by the manufacturer and I'm willing to pay the 'extra change' for the 'peace of mind'. I figure if I spend $40K on a car then a few extra cents in gas is not only OK but very reasonable to remain within the guidelines of the manufacturers 'recommendations'. I don't have any issues with those are looking to save on gas in this matter. More power to them.