Stoodo

iTrader: (4)

The 2004 Tundra was rated for 87....

LoveThatV8

iTrader: (1)

I already knew that but thanks for checking

As ive said it burned quicker, got some pinging and defeated the purpose of gas so i upped using 91 and it solved my issue, plus the Toyota techs advanced the timing each time i changed the timing belt (3 times).

Stoodo

iTrader: (4)

My point was, if I had an engine that was rated to run 87, it damn well better run properly on 87.

Gotcha350

These are sport sedans...granted not high performance but I just don't understand why you would want to lessen the performance any...it does make a difference...the good thing is that DI helps cool the combustion chamber so it helps reduces the chance for damage...

worker

But if it run better on sea water, would you use that instead of following the little sticker behind the gas cover saying use only 87?

worker

maybe I'll try it one day. But for now I have many other major fix. Like the exhaust line is getting rusted through. Lots of rust down there.

TRD_Power

My parents have an '03 Tundra that also says to use 87 on the gas door, which it will run on, but not nearly as well as 92. Pretty sure it's all a gimmick to help sell the vehicle to those who are more concerned with the MPG. Dad tried 87 in it once, and it ran like crap compared to 92... However, it still ran

sonnyhood

Here Premium has 2 grades, 95 octane and 98 octane.
So i use 95.
Which is what my fuel cap says, premium only.
98 i put in now and then

LexusLive

It only wants 91, though, aren't you just wasting money by having to put 95 or 98?
Where do you live that you have 98 Octane?
The highest I can buy here in GA is 93.

Stoodo

iTrader: (4)

Your answer can be found here.

http://en.wikipedia.org/wiki/Octane_rating

Australia: "regular" unleaded fuel is 91 RON, "premium" unleaded with 95 RON is widely available, and 98 RON fuel is also reasonably common.

Bottom line RON vs AKI when measuring octane.

sam12345

iTrader: (1)

I Notice on my car that with Costco premium it runs better than with sams premium. Maybe it's psychological but now I only use costco. I believe costco has more additives but that should have no effect on performance short term only long term in that it keeps the engine cleaner

worker

Maybe I should try premium elsewhere. The 2 tanks premium I tried were Costco.

oh, BTW about disconnecting and reconnecting battery. If you know about electronic/electricity. That initial spark is not good for electronic. It recommend to always leave the battery connect to buffer that spark.

LOLjasonW

So I was strollin through the forum and I have a pretty simple question .......... I think

I have always used premium in my 06 Gs300, I have heard mixed answers on here about using premium only. Some say premium only some say can use regular with no harm.....I was under the impression that it was premium only.......Anybody know the answer, or at least know the effects of long term usage. MPG, Performance anything......TYIA

MX73

I know for one, you won't get the sulfur "rotten egg" smell with premium fuel. Reduce performance is another. On a vehicle that has direct injection only, premium tends to reduce (not eliminate) the amount of carbon build on the back side of the valves since it burns a little more "complete" than regular fuel.

I wouldn't advise using regular fuel unless you really have to.

Propulsion

Premium....