Premium unleaded??? - TTORA Forum
 
LinkBack Thread Tools Display Modes
post #1 of 24 (permalink) Old 06-14-2005, 11:13 AM Thread Starter
Newbie
 
rtroast's Avatar
 
Join Date: Jun 2005
Location: NW Arkansas
Posts: 2
Premium unleaded???

I just bought a 2005 Tacoma 4x4 Double Cab with V-6.
Is it absolutely necessary to use premium unleaded gasoline vs regular unleaded?
rtroast is offline  
Sponsored Links
Advertisement
 
post #2 of 24 (permalink) Old 06-14-2005, 11:37 AM
What's Mommy Say?
 
jtaco1's Avatar
 
Join Date: Dec 2004
Location: Marysville, PA
Posts: 2,721
Send a message via AIM to jtaco1
Look through the Owners Manual and see what they call for, that is what you should use because that is what the engine was designed for. I had a problem with mine when I ran the high test stuff, my truck was running way rich and could not burn is, so my tailpipe got really black. I have switched over to regular and it is much better, along with being cheaper.

JT

DD - 05 Toyota 4 Runner
Trail Rig - 88 4 Runner with dual cases w/ 4.7's, 37" PB Rockers and no lift

Was
99' Toyota Tacoma Crushed by Toyota
jtaco1 is offline  
post #3 of 24 (permalink) Old 06-14-2005, 01:08 PM
Senior Member
 
J-Man's Avatar
 
Join Date: Dec 2004
Location: Santa Monica, Ca
Posts: 472
i doubt its necessary, or at least it shouldnt be. Run the cheapo stuff and see what happens. see if you notice any hesitations, knocking, or whatever. I highly doubt you need to. Could just be the oil companies .02 wanting you to spend more $$$.

2001 Tacoma TRD, & 2000, 1999, 1997 Toyota 4Runners -all are 5spd 4x4 v6 with saw's / ome suspension.
J-Man is offline  
post #4 of 24 (permalink) Old 06-14-2005, 01:15 PM
Veteran Member
 
Texan1983's Avatar
 
Join Date: Jun 2005
Location: ames, ia
Posts: 1,230
just wondering, on my 02 v6 it says to use premium fuel right on the fuel cap. is that what i should be using?
Texan1983 is offline  
post #5 of 24 (permalink) Old 06-14-2005, 01:34 PM
Senior Member
 
J-Man's Avatar
 
Join Date: Dec 2004
Location: Santa Monica, Ca
Posts: 472
uh, no. Only if your running a supercharger on models before 04 should you be filling with 91. Other than that, your wasting $$ and not burning the correct fuel for how the engine is programmed.

2001 Tacoma TRD, & 2000, 1999, 1997 Toyota 4Runners -all are 5spd 4x4 v6 with saw's / ome suspension.
J-Man is offline  
post #6 of 24 (permalink) Old 06-14-2005, 01:48 PM
Veteran Member
 
atwinda's Avatar
 
Join Date: Nov 2004
Location: Lake Arrowhead/San Diego, CA
Posts: 1,521
your 05 was designed to run on at least 91.
atwinda is offline  
post #7 of 24 (permalink) Old 06-14-2005, 01:50 PM
Senior Member
 
GangusKhanh's Avatar
 
Join Date: Apr 2005
Location: Central Massachusetts
Posts: 182
Send a message via AIM to GangusKhanh
I tried 87 and 89 octanes, and my engine was knocking and pinging like crazy. 93 is the only thing going int he tank right now.
GangusKhanh is offline  
post #8 of 24 (permalink) Old 06-14-2005, 02:38 PM
Senior Member
 
pportera's Avatar
 
Join Date: Dec 2004
Posts: 240
89 here or i get pinging
93 is a waste for any car, unless its blown or shooting nos. Or of course if u have a motor with higher compression.

i think 89 is best all around
pportera is offline  
post #9 of 24 (permalink) Old 06-14-2005, 02:42 PM
Member
 
Join Date: Jun 2005
Posts: 84
Mine is so new, I'm still on the tank the dealer provided when I picked the truck up. The owners manual says to use 87, but recommends 91 for increased performance... what does that mean? The 4.0L has a 10:1 compression ratio. I will call my salesman and ask what octane they put in it. This should be interesting.

Last edited by PaulH; 06-14-2005 at 02:51 PM.
PaulH is offline  
post #10 of 24 (permalink) Old 06-14-2005, 03:27 PM
Member
 
remelad's Avatar
 
Join Date: May 2005
Location: Salunga, Pa
Posts: 76
Send a message via AIM to remelad
2005 recommends at least 87 octane, its in the owners manual. I have tried all 3 grades and I get the best mileage & performance on 87 with no pinging whatsoever.

Chad M. Germer
ASE Master Technician
D & C Auto Center
Spray On Products Bedliner Dealer
remelad is offline  
post #11 of 24 (permalink) Old 06-14-2005, 07:00 PM
Senior Member
 
TacoMike82's Avatar
 
Join Date: Mar 2005
Location: Camp Taji, Iraq
Posts: 180
I've run mine on 87 and 91, no pinging with the 87 and no performance difference. Save the money.

2007 FJ Cruiser, 6 Speed, RoughCountry 3" Spacer, 17x9 DC-1, 33x12.5 MT Baja Claws, TRD CAI, Flowmaster 40 Series, URD ShortShifter

2009 Access Cab Taco, 4x4, 6 Speed, TRD Off Road, 3" ToyTec Spacer, Toy Tec AAL, 17x9 ATX Artillery, 285/70/17 Goodyear Duratracs, TRD CAI, Flowmaster 40 Series
TacoMike82 is offline  
post #12 of 24 (permalink) Old 06-14-2005, 10:12 PM
Senior Member
 
EndersTaco's Avatar
 
Join Date: May 2005
Location: Hampton Roads VA
Posts: 214
I am at and around sea level all day. Around here most of the 05 taco's ping on the 87. I run a high quality 89 (Wawa gas, seems more consistant that the others around here) and get my most consistant gas mileage (16-17 in town, 18-19.67 on the road) and I drive in an inspired fashion!
EndersTaco is offline  
post #13 of 24 (permalink) Old 06-15-2005, 09:39 AM Thread Starter
Newbie
 
rtroast's Avatar
 
Join Date: Jun 2005
Location: NW Arkansas
Posts: 2
Thanks to all. I guess I will just see how 87 (which is what the dealer most likely put in) performs. If it starts to ping or lag, I'll have to upgrade.

Thanks
rtroast is offline  
post #14 of 24 (permalink) Old 07-25-2005, 03:17 PM
Senior Member
 
Mikevr007's Avatar
 
Join Date: Jan 2005
Location: Gainesville, Florida
Posts: 381
In searching for more info on this I found out that on the '05 V6, Regular unleaded will work (obviously), but for optimal performance and fuel mileage, 91 is recommended.

Which brings me to a question.
In the 2003 Factory Service Manual, under New Features for the 5VZ-FE Engine, it lists "91 or more" for the Research Octane Number.
Does anyone know if that is true for the 2004? I'm guessing it is.
The operator manual says 87.

Thanks!

2004 Tacoma X-Cab 4x4, V6/Auto, TRD.
A.R.E Topper
Deckplate &elbow mods
DR 2.5" spacers/AAL/Bil 5125's
4Crawler 1" Body Lift
32x11.5 BFG MT's
15x8 American Racing Diamond Lock II's
Electric Fans . Blue Top
Mikevr007 is offline  
post #15 of 24 (permalink) Old 07-25-2005, 03:25 PM
Senior Member
 
absolut taco's Avatar
 
Join Date: Dec 2004
Location: Taylorsville, Utah
Posts: 357
At CostCo, where I fill up, I have a choice of 85 and 91 octane. I have never used less than 91. I think you should use the best gas you can get for your Toyota.

2004 Tacoma Extended Cab 4x4 TRD | 3.4 Liter V6 | 5-speed manual
absolut taco is offline  
post #16 of 24 (permalink) Old 07-25-2005, 03:26 PM
Veteran Member
 
Dick Foster's Avatar
 
Join Date: Dec 2004
Location: Nevada City, NorCal
Posts: 12,891
This should have been posted in the newbie folder, that is what that folder is there for. Your post has nothing at all to do with 4X4.

I admit to being Crazy but I'm not Stupid
Dick Foster is offline  
post #17 of 24 (permalink) Old 07-25-2005, 04:04 PM
Veteran Member
 
Dick Foster's Avatar
 
Join Date: Dec 2004
Location: Nevada City, NorCal
Posts: 12,891
That's better.
You only need to run premium if the owners manual says so. I ran the middle grade befor the SC. If you have the SC then you must run premium. Just fuel is up with the recommend fuel and listen for knock. If you hear consistant knock and ping with the same grade of fuel of different brands then kick it up to a higher grade of fuel. If the engine was designed to run on 85 and does so without ping, then buying premium fuel only wastes your money.

I admit to being Crazy but I'm not Stupid
Dick Foster is offline  
post #18 of 24 (permalink) Old 07-26-2005, 07:23 AM
Senior Member
 
Mikevr007's Avatar
 
Join Date: Jan 2005
Location: Gainesville, Florida
Posts: 381
I really thought some anal person here (other than myself) would explain this. So, if no one else is going to, here it is. Please take note of the very last sentence...

"The most important characteristic of gasoline is its Research Octane Number (RON) or octane rating, which is a measure of how resistant gasoline is to premature detonation ( knocking). It is measured relative to a mixture of 2,2,4-trimethylpentane (an octane) and n- heptane. So an 87-octane gasoline has the same knock resistance as a mixture of 87% isooctane and 13% n-heptane.

There is another type of Octane, called "Motor Octane Number" (MON), which is a better measure of how the fuel behaves when under load. Its definition is also based on the mixture of isooctane and n-heptane that has the same performance. Depending on the composition of the fuel, the MON of a modern gasoline will be about 10 points lower than the RON. Normally fuel specifications require both a minimum RON and a minimum MON.

In most countries (including all of Europe and Australia) the 'headline' octane that would be shown on the pump is the RON: but in the United States and some other countries the headline number is the average of the RON and the MON, sometimes called the "roaD Octane Number" or DON, or (R+M)/2. Because of the 10 point difference noted above this means that the octane in the United States will be about 5 points lower than the same fuel elsewhere: 87 octane fuel, the "normal" gasoline in the US and Canada, would be 92 in Europe."

2004 Tacoma X-Cab 4x4, V6/Auto, TRD.
A.R.E Topper
Deckplate &elbow mods
DR 2.5" spacers/AAL/Bil 5125's
4Crawler 1" Body Lift
32x11.5 BFG MT's
15x8 American Racing Diamond Lock II's
Electric Fans . Blue Top
Mikevr007 is offline  
post #19 of 24 (permalink) Old 07-26-2005, 07:55 AM
Crime and Punishment
 
zosimov21's Avatar
 
Join Date: Mar 2005
Location: W-S NC
Posts: 1,348
So we can run the cheapo stuff here and it will be the same as running high test in EU?

04 Taco
Locked and loaded front and rear
Budbuilts / Chevy 63" springs / 285/75/16 AT

1980 1st Gen
Detroit Front / Welded rear

NC TTORA
http://www.ncttora.com/


Quote:
Originally Posted by Dick Foster
No! If you can't understand that much I think you need to reenter the 1st grade and draw it up for yourself in crayon.

zosimov21 is offline  
post #20 of 24 (permalink) Old 07-26-2005, 09:08 AM
Senior Member
 
absolut taco's Avatar
 
Join Date: Dec 2004
Location: Taylorsville, Utah
Posts: 357
Quote:
Originally Posted by Dick Foster
If the engine was designed to run on 85 and does so without ping, then buying premium fuel only wastes your money.
There is an article in the latest Car & Driver that suggests higher octane gas will leave less gunk on your fuel injectors meaning they will go longer before needing to be serviced. I'm not saying C&D is always right, just sharing some info...

2004 Tacoma Extended Cab 4x4 TRD | 3.4 Liter V6 | 5-speed manual
absolut taco is offline  
post #21 of 24 (permalink) Old 07-26-2005, 10:39 AM
Member
 
Join Date: Jul 2005
Location: SoCal
Posts: 63
Quote:
Originally Posted by Mikevr007
Because of the 10 point difference noted above this means that the octane in the United States will be about 5 points lower than the same fuel elsewhere: 87 octane fuel, the "normal" gasoline in the US and Canada, would be 92 in Europe."
I knew about the other stuff, but the last paragraph is new to me.

No wonder when I was in New Zealand it was 92 (Premium) and 96 (Ultra Premium). But their choice of words for premium and ultra premium made it sound like their gas is superior to the fuel in the States.

In terms of diesel I know they have better stuff than we have here in the States. USA - Now hurry up with the ULS [ultra low sulfer] diesel.
Screehopper is offline  
post #22 of 24 (permalink) Old 07-26-2005, 11:18 AM
Senior Member
 
J-Man's Avatar
 
Join Date: Dec 2004
Location: Santa Monica, Ca
Posts: 472
Quote:
Originally Posted by absolut taco
There is an article in the latest Car & Driver that suggests higher octane gas will leave less gunk on your fuel injectors meaning they will go longer before needing to be serviced. I'm not saying C&D is always right, just sharing some info...
Higher octane gas does not mean its cleaner. The higher the octane number means its less explosive gas, or less prone to knocking under load, running higher test gas in vehicles that are designed for 87 means that the engine is not burning the gas completly which can lead to worse performance and leaving deposits and gunk where as if you run 87 in the vehicle thats designed for 87, it burns efficiantly - sp?

Its also important to give the vehicle a "mexican tune up" as my buddy in baja once told me - just drive it at 5-6k rpm's for 20 minutes and no more build up inside the engine.

2001 Tacoma TRD, & 2000, 1999, 1997 Toyota 4Runners -all are 5spd 4x4 v6 with saw's / ome suspension.

Last edited by J-Man; 07-26-2005 at 11:22 AM.
J-Man is offline  
post #23 of 24 (permalink) Old 07-26-2005, 11:22 AM
Veteran Member
 
Dick Foster's Avatar
 
Join Date: Dec 2004
Location: Nevada City, NorCal
Posts: 12,891
Yep.

I admit to being Crazy but I'm not Stupid
Dick Foster is offline  
post #24 of 24 (permalink) Old 07-26-2005, 01:05 PM
Veteran Member
 
TACODOC's Avatar
 
Join Date: May 2005
Location: California Republic
Posts: 1,340
I've been running 87 octane since new, I'm sure the dealership "free tank of gas" at purchase was 87 as well. No problems with 87, truck runs fine and hauls ass

Adventures in and out of your vehicle: AMERICAN ADVENTURIST
TACODOC is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the TTORA Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in









Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
Does the 05 V6 require Premium? Alaskan Assassin Performance/Engine/Exhaust 7 03-01-2005 04:19 AM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome