xspsi6

iTrader: (31)

This is a serious question for the non vvti sc400 owners with a stock 1uzfe.
Since there is a 30 cents differebce between 87 and 93 the savings will add up pretty fast if I could long term getaway with crap gas.

In my is300 I could run cheap gas but mileage was worse due to ping or knock being picked up via the knock sensor and of course pulling timing but being the 1st gen 1uzfe is a non vvti engine and although a 10:1 compression ratio I would venture to guess I could get away with 89 oct fuel with out knock.

I hate to even ask this but 80.00 per week in gas is getting old and fast!

Joey-E

iTrader: (1)

Always have and always will use 93+ plus in my SC4, as 91+ premium is recommended. But that’s just me.
And yes gas prices suck!

xxtoobsxx

iTrader: (4)

91...all that we have here in SD. That's why i ride my CBR all the time now!!

FatBrian81

iTrader: (2)

I've been running 87 in my 95 300 for the last two tanks and I've averaged over 320 miles a tank with mostly interstate driving. I haven't noticed any ill affects or performance loss. Even lower grade fuels have had so much of the particulates that contributed to detonation removed that most of us who have stock engines can probably run 87 without any problems. Do you remember when 87 was orange in color and only 93 was clear ? Now even 87 is almost as clear as water.

I was worried at first so what I did was run the car until the low fuel light was on then went and got five dollars worth of 87 as a test. That way if the car ran like crap I could get plenty of good high test in to save the day. With that five dollars of gas I did some part throttle driving and some wide open pulls and highway passes. I didn't have any problems with the one caveat being, in my area we have to use a special blend of gas due to EPA regs so it may depend on what kind of gas is available in your area.

xspsi6

iTrader: (31)

Thats all I run currently but my supra made 612whp on pump 93 and there is really no need for 93 on a stock motor so what I may do is run a few tanks of 87 and plug up the knock amp which lets you listen for detonation and see if there is any knock and if there is none I will just keep on with the cheap gas but this is a major undertaking so it may be awhile before I even get to it however I would still like to hear peoples input.

Kira X

iTrader: (24)

I use 91 or higher. I haven't seen any 93+ gas stations in the area though.

socal72

iTrader: (8)

The majority of the time its 91 but I have run 89 and it seemed to be fine. I also only use Chevron and at every other oil change I use Sea Foam intake cleaner and I also Sea Foam the engine just to keep up on the preventative maintenance. Just my two penny's

BlaineyB

in my 92 sc400, i always use 91 at chevron. its $4.01 here in vegas. idk if it went up again. gas prices here suck, basically probably everywhere.

account2x

iTrader: (5)

Lower octane fuel burns faster so part of the difference in cost is offset by the decrease in mileage.

$4 x 18 gallon = 72 per full tank
$4.3 x 18 = 77 per full tank.

That is a 5 dollar difference. If you cannot afford premium fuel buy a Honda Civic.

iridebmx

iTrader: (6)

^for less you can go further

i use 93

abounly

iTrader: (27)

i always use 91 on mines.

i remember my friends brand new BMW they put 87 octane and it shut down on them randomly took it to the dealer and told them to use 91 instead.

BLK13X

All my cars, from the dd SC4, family GS3 and load hauler Previa all use 98RON fuel (I think that's equivalent to approx 93 or 94AKI gas you guys get Stateside). Probably not absolutely necessary but has been a habit.

I refuse to use any of the current ethanol blends (E10 here in Australia) in anything except for the work cars (because that's all we're allowed to put in). Something scares me about pumping ethanol through 20 year old fuel lines...

BTW on my last fill up it was at AUD$1.50/L, which works out approximately $5.67/gal so everyone stop your complaining

Klaus

iTrader: (1)

It's not about affordability, it's about wasting cash man. And that's an idiotic and arrogant attitude when most of these SCs cost less than a honda civic haha.

So first off, premium gas has a higher heat of combustion and THAT is the primary reason for higher octane and why it resists pre-ignition. Some of the additives do make it more efficient, but the difference in negligible. The price difference however is very real.

I put on about 15,000 miles per year which after some basic math is about 900 gallons of gas. Difference in my area is about $.35 between regular and premium and about $.25 between 89 and 91. Even just switching to 89 will save over $200 per year. Why throw away $200 when it literally makes NO difference in the performance and reliability of your engine?

Tabaka

iTrader: (8)

This x2

mrae101

iTrader: (1)

I run 93+ octane and then every once awhile I drive about 30 mile from my home and pick up some unleaded racing fuel and mix it in with the 93 octane. I do notice that the car real like's the good stuff but I only realy do this when I plan to use my nitrous system.