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Premium Fuel in Cars That it is Recommended #4621418
01/02/18 09:05 AM
01/02/18 09:05 AM
Joined: Sep 2002
Posts: 2,275
VA
Gebo Offline OP
Gebo  Offline OP
Joined: Sep 2002
Posts: 2,275
VA
With the price differential getting so great between regular unleaded and premium unleaded am I wasting money using premium? I never thought much about it up until it broke the 50 cent/gal differential.

I know I get better mileage and probably more power with the premium but this is more than an oil change expense twice a year. This could be $1000 a year to me.

I wish I KNEW why Toyota RECOMMENDS premium. I guess that is my real question. Why do they recommend it?


'98 LEX LS400 280K
'00 LEX GS300 195K
'02 4Runner 225K
'05 Lex LS430 85K
'06 Toyota Highlander 145K
'09 Lex IS350 85K
'07 Lex GX470 58K
Amsoil in all engines, transmissions and differentials

Re: Premium Fuel in Cars That it is Recommended [Re: Gebo] #4621421
01/02/18 09:11 AM
01/02/18 09:11 AM
Joined: Oct 2014
Posts: 11,845
Idaho
CT8 Offline
CT8  Offline
Joined: Oct 2014
Posts: 11,845
Idaho
Originally Posted By: Gebo
I wish I KNEW why Toyota RECOMMENDS premium. I guess that is my real question. Why do they recommend it?
Did you read the owners manual? Only you can decide to spend the extra $$$ for higher octane gas. Higher oczne fas allows moreadvance which equa;s mpre power and potentially more mpgs.


2015 Ford F150 2.7
2018 Ford F350 6.2
Re: Premium Fuel in Cars That it is Recommended [Re: Gebo] #4621425
01/02/18 09:19 AM
01/02/18 09:19 AM
Joined: Sep 2002
Posts: 2,275
VA
Gebo Offline OP
Gebo  Offline OP
Joined: Sep 2002
Posts: 2,275
VA
Sure did. Read it several times over the years. I assume THOSE reasons would apply to most every vehicle on the road. I probably just had too much caffeine and the conspiracy theorist raised his ugly head.

Just finished watching "Engineering Explained" video talking about this very subject. Just got me thinking...


'98 LEX LS400 280K
'00 LEX GS300 195K
'02 4Runner 225K
'05 Lex LS430 85K
'06 Toyota Highlander 145K
'09 Lex IS350 85K
'07 Lex GX470 58K
Amsoil in all engines, transmissions and differentials

Re: Premium Fuel in Cars That it is Recommended [Re: Gebo] #4621427
01/02/18 09:22 AM
01/02/18 09:22 AM
Joined: Jun 2003
Posts: 5,921
Illinois
SHOZ Offline
SHOZ  Offline
Joined: Jun 2003
Posts: 5,921
Illinois
Around me the spread between grades is anywhere from $0.10 a gallon to $0.30 a gallon. Some places the premium is a $1 more than regular. I use premium exclusively on my Genesis Coupe due to a tune. It runs great on even the cheapest 92 octane there is, usually Pilot. But gets better gas mileage on 93 octane.


2008 Hyundai Accent 1.6L 5 sp manual hatchback
2010 Hyundai Genesis Coupe Track 2L Turbo 6sp manual
Re: Premium Fuel in Cars That it is Recommended [Re: Gebo] #4621430
01/02/18 09:25 AM
01/02/18 09:25 AM
Joined: Nov 2011
Posts: 1,053
Lyndhurst NJ
Audios Offline
Audios  Offline
Joined: Nov 2011
Posts: 1,053
Lyndhurst NJ
When I was at BMW tech school, they said to prove that premium cars run better on super, do 5 tanks back to back of regular and average the economy out, then the same with premium for 5 tanks. My instructor guaranteed that BMWs would return 4-5 better mpg overall using what the car called for. Its a false economy, youre paying less up front but more often for it. One tank could get you another 60-75 miles each tank, so by the 4th one, youre a whole tank behind with regular.


2002 VW Golf TDI-Mobil 1 5/40 TDT
2007 Mercedes GL320 CDI Fuchs 5/40 GT Pro XTL
2005 BMW M3 BMW Twin Power 10/60
2003 BMW M5-Fuchs 5/40
1998 BMW M3/4/5 Fuchs 5/40
Re: Premium Fuel in Cars That it is Recommended [Re: Gebo] #4621433
01/02/18 09:26 AM
01/02/18 09:26 AM
Joined: Jul 2002
Posts: 4,394
KY
MCompact Offline
MCompact  Offline
Joined: Jul 2002
Posts: 4,394
KY
If the manual recommends premium fuel then that is what I use. Period. I'm not about to compromise performance for a few pennies a day.


Mine:
2014 M235i
1999 Wrangler Sahara
1995 318ti Club Sport

Wife's:
2009 Cooper Clubman

Son's
2009 328i

Buy what makes you smile...
Re: Premium Fuel in Cars That it is Recommended [Re: Gebo] #4621443
01/02/18 09:34 AM
01/02/18 09:34 AM
Joined: Oct 2002
Posts: 36,295
Great Lakes
Quattro Pete Offline
Quattro Pete  Offline
Joined: Oct 2002
Posts: 36,295
Great Lakes
Originally Posted By: Gebo
I wish I KNEW why Toyota RECOMMENDS premium.

Which Toyota recommends premium?


'02 530i (Edge 0W-40)
'15 Q5 3.0T (Edge 5W-40)
'18 Charger SRT (FF)
Re: Premium Fuel in Cars That it is Recommended [Re: Gebo] #4621455
01/02/18 09:43 AM
01/02/18 09:43 AM
Joined: Mar 2013
Posts: 4,766
The Midwest
skyactiv Offline
skyactiv  Offline
Joined: Mar 2013
Posts: 4,766
The Midwest
I think there is one 2018 Toyota with a turbo engine? GM has already stated last year they wanna see a standard high octane fuel. It's simply a must for the gasoline combustion engine to survive in future vehicles because of the looming 2025 MPG requirement

Last edited by skyactiv; 01/02/18 09:44 AM. Reason: S.artphone typos

Wife: 15' Audi A4 quattro 6 speed manual
Me: 13' VW GTI 3 door 6 speed manual
Re: Premium Fuel in Cars That it is Recommended [Re: Quattro Pete] #4621460
01/02/18 09:50 AM
01/02/18 09:50 AM
Joined: Oct 2012
Posts: 2,464
Staten Island, NY
michaelluscher Offline
michaelluscher  Offline
Joined: Oct 2012
Posts: 2,464
Staten Island, NY
Originally Posted By: Quattro Pete
Originally Posted By: Gebo
I wish I KNEW why Toyota RECOMMENDS premium.

Which Toyota recommends premium?


Well, mine for one

It'll run on regular, but 1MZ/3MZ. and 2GR V6's are all high enough compression, that under the right conditions they ping like they're gonna fall apart, and retard timing accordingly

It "recommends" at least 91 or better

People question why a 12 year old Camry is getting 93 octane at the Costco

It's cheaper in the long run, and I can drive it the way I want to, without it sounding like a coffee can full of marbles

IIRC, compression is 10.8:1, which is well up there into liking premium


'06 Toyota Camry SE V6 3MZ-FE 100k
'01 Mercury Villager Estate VG33E 52k
'06 Ford Taurus SE Vulcan 60k
'13 Chrysler 300 3.6 Pentastar 230k
Re: Premium Fuel in Cars That it is Recommended [Re: Gebo] #4621467
01/02/18 09:55 AM
01/02/18 09:55 AM
Joined: Feb 2003
Posts: 4,475
Arkansas
Win Offline
Win  Offline
Joined: Feb 2003
Posts: 4,475
Arkansas
Recommended sounds like a suggestion that you can take it or leave it, as you wish. So, take it or leave it, as you wish.

The operating manuals for the two 6 cylinder Pontiacs in my sig recommend 89, without actually saying they recommend it - the manual says rated horsepower on 87, but max performance on 89. It is a noticeable difference for only two points, but, optional.

You might try 89 - it is a premium fuel relative to 87. If the engine requires 91 for rated horsepower, you won't get there, of course, but if the engine management can handle it without a lot of detonation, etc., it may be worthwhile. My V12 sounds like it's full of marbles at more than light throttle with less than 91, but my V8 Jaguar does OK on 89 for normal driving.


09 Torrent 3.6 V6 M1 0/40
09 Solstice 2.4 I4 Fram 5/30
08 G8 3.6 V6 Fram 5/30
04 Xj8 4.2 V8 Hav 5/40
99 S-10 2.2 I4 RECOVERED
94 Xj12 6.0 V12
Re: Premium Fuel in Cars That it is Recommended [Re: Gebo] #4621472
01/02/18 09:58 AM
01/02/18 09:58 AM
Joined: Apr 2004
Posts: 7,740
New York
pbm Offline
pbm  Offline
Joined: Apr 2004
Posts: 7,740
New York
I won't buy a car that 'requires' premium fuel.
It's one thing to pay 10 or 15 cents a gallon more but when it's 50 to 70 cents more your talking a lot of cash.


'Journalism is Dead'
Re: Premium Fuel in Cars That it is Recommended [Re: Quattro Pete] #4621474
01/02/18 10:03 AM
01/02/18 10:03 AM
Joined: Sep 2002
Posts: 2,275
VA
Gebo Offline OP
Gebo  Offline OP
Joined: Sep 2002
Posts: 2,275
VA
Originally Posted By: Quattro Pete
Originally Posted By: Gebo
I wish I KNEW why Toyota RECOMMENDS premium.

Which Toyota recommends premium?


My Lexi


'98 LEX LS400 280K
'00 LEX GS300 195K
'02 4Runner 225K
'05 Lex LS430 85K
'06 Toyota Highlander 145K
'09 Lex IS350 85K
'07 Lex GX470 58K
Amsoil in all engines, transmissions and differentials

Re: Premium Fuel in Cars That it is Recommended [Re: Gebo] #4621475
01/02/18 10:03 AM
01/02/18 10:03 AM
Joined: Aug 2003
Posts: 12,898
NE,Ohio
Rand Offline
Rand  Offline
Joined: Aug 2003
Posts: 12,898
NE,Ohio
My jeep suggests 89, says it will run on 87... but it does pull alot of timing.

The other day I stopped at an exxon station to use my amex promo (10$ off 25$ purchase)

87 gas was 2.39 which was the price everywhere.. 89 was 2.99 and 92 was $3.59!!!!

Everywhere else(near me) the price difference is 25 to 30cents between grades

Buffalo had the right idea when I was there..

IIRC 89 was 10-15cents more than 87 93 was 30-40cents more than 87

I've tried using 87 but even when its cold out it runs goofy.
the zf-9 speed transmission likes to run at 1100-1400rpm then it will ping and make noise with any tap on the gas..
so I have to restrict downshifts to keep the rpms up more. and its pretty limp on going uphill at less than 2500rpm or so.

I just suck it up and go for 89 or 90 octane.


2019 Jeep Cherokee Trailhawk 2.0T
Re: Premium Fuel in Cars That it is Recommended [Re: Gebo] #4621477
01/02/18 10:05 AM
01/02/18 10:05 AM
Joined: Mar 2010
Posts: 1,325
Michigan
BobsArmory Offline
BobsArmory  Offline
Joined: Mar 2010
Posts: 1,325
Michigan


Keeping the forces of evil at bay
2016 Chevy Malibu LT 1.5 Liter Turbo
2017 Chevy Equinox LT 2.4 Liter
Re: Premium Fuel in Cars That it is Recommended [Re: Gebo] #4621482
01/02/18 10:07 AM
01/02/18 10:07 AM
Joined: Nov 2016
Posts: 1,278
WI
HoosierJeeper Offline
HoosierJeeper  Offline
Joined: Nov 2016
Posts: 1,278
WI
My LR3 recommends premium but I run regular, unless I'm in the mountains and working it hard.


15 Jeep KL Limited V6: Formula Shell 5W20
07 LR3 SE V8: Maxlife 5W30
05 Jeep KJ Limited: PHM 5W30
96 Jeep XJ Country: STP HM 5W30 (winter)
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