Just filled up the tank with 91 octane premium fuel

[2009Toyotoad]

Originally Posted by borezack

Hello first post here.

I have an 08 sedan.

Just would like to know if I should change from using 85 to 87.

I'm driving at 3000 to 10000 ft elevation and regular here is 85, plus is 87 and premium 91.

Also Just took a trip and was about 200ft above sea level and I used 87 since that was regular and my car felt like a rocket ship lol

Just would like some input.

Thanks

This is probably a question best answered by a local Toyota dealer. They should have the best knowledge on local conditions and fuel qualities.

[borezack]

There is no local Toyota dealer here. The closest one is over 130 miles away.
Will 85 octane damage the engine?

[schleppy]

87 octane is the lowest recommended isn't it? I wouldn't go lower than that, esp. at higher altitudes.

[twowheels]

Originally Posted by Aothachos

+2 lol i used to get 60 miles before the first bar went, now i use 91 it goes up to 75-80 on the first bar =), i wasn't satisfied with 60 miles on the first bar

I'll call your anecdote and raise you one...

I always run 87 and almost always get 90+ miles from the first bar w/o topping off.

[mryaris]

Originally Posted by borezack

Will 85 octane damage the engine?

No. 85 octane is used in locations with high altitudes because it behaves like 87 does at lower altitudes/sea level. I live in Colorado and regular is 85, mid is 87 and premium is 91.

So.....to clarify a bit, high altitude 85 octane= the 87 octane that all the low-landers use, so using mid-grade 87 is not necessary.

[SilverGlow]

As the altitude goes up, the requirement for high octane goes down.

[Forrest]

With the cost of gas going up so quickly, yesterday, May 29th it was 2.60 for 87 and 3.00 for highest oct., I would stick to the recommended gas at the lower price.

[ImportRacer88]

when i first got mine i ran preimum once and the car ran like shittocky mushrooms and when i went to fill up i put regular back in it and it ran better so i just been running reg had no probs here but im moving back to pa has ne one had any probs woth thier CAI in the snow pm me and let me know

[borezack]

OK thanks for the info

[Yaris Hilton]

How far you go on the first bar depends heavily on how full you fill the tank. I run the pump fast till it clicks off, wait a few seconds, start it back at a trickle and let it click off again. (It barely puts in a dollop of gas the second time, but it makes for a pretty consistent fill without overfilling.) I usually get close to 100 miles on the first bar.

[voodoo22]

We've never put in anything other than 87 octane. We purchased the Yaris to reduce travel expenses and given it's performance over the first 79 fill ups 87 octane suits it quite well.

We do only fill at top tier stations though.

[Thai_Dang]

91 octane will make your penis larger. yeah i've also read anything above 87 is harmful for your engine. Makes sense, these cars have sensitive timings. But i can't imagine with how many computer chips they put into these cars nowadays, that the ECU would detect the 91 octane that some idiot put in their car and adjusted the timings of fuel injection so it doesn't cause engine knock/build-up.

[ddongbap]

HOLY THREAD REVIVAL.

[frog13]

Compression dictates octane

[yarrr]

Originally Posted by ddongbap

HOLY THREAD REVIVAL.

ya its kind of his thing if you hadn't noticed. I think maybe his "new posts" button reads "old posts" and he can only see the oldest posts on the forum.

[10peep]

Originally Posted by ddongbap

HOLY THREAD REVIVAL.

I just spent 35 minutes reading this pissing contest so I absolutely HAVE to make some kind of comment to revive it. You ready....? Here it is.........comment.

Originally Posted by 07WYarisRS

"......Thats why many bio deisel set up have a deisel start because the biomixtures like used engine oil of veggie oil often has a much higher flashpoint and is harder for the engines to start on them. they start on the diesel and then switch over to run on bio once warmed up......."

^^^ This is wrong, btw. Biodiesel setups usually do not have any type of diesel start or diesel purge setup because biodiesel is made by the user from WVO. On the contrary, WMO/WVO setups almost always have a diesel start and diesel purge setup because the viscosity of the "fuel" (WMO/WVO) is MUCH higher than the viscosity of ordinary diesel until it reaches temperature (usually around 180deg) and will very quickly clog up one's entire fuel system if initiated before it reaches optimum temp. Consider this thread revived and maybe now we can discuss something MUCH cooler than octane ratings, smoothness and high/low compression engines....DIESEL!!!!

[Idahotom]

Speaking of diesel: I was at a gas station in SE Idaho the other day, fueling up my 22 ton boom truck. I was astonded to see they were offering straight diesel ($3.86 per gallon), off road/non dyed (and you do NOT want to get caught with that in your tank) for $3.64, and lastly bio diesel for $3.86. The owner of the station must be a diesel freak! As everywhere else was elling diesel for $3.97 or higher, I was a happy camper.

A few days earlier, while also fueling the boom truck, I struck up a conversation with a VW Jetta driver: 47 to 49 MPG, and he had over, well over, 200,000 miles on it. Without even doing the math (in general higher priced diesel V. gasoline) the Yaris compares well...( in the low 40's, my own results) plus I trust Toyota more then VW!

[10peep]

Originally Posted by Idahotom

Speaking of diesel: I was at a gas station in SE Idaho the other day, fueling up my 22 ton boom truck. I was astonded to see they were offering straight diesel ($3.86 per gallon), off road/non dyed (and you do NOT want to get caught with that in your tank) for $3.64, and lastly bio diesel for $3.86. The owner of the station must be a diesel freak! As everywhere else was elling diesel for $3.97 or higher, I was a happy camper.

A few days earlier, while also fueling the boom truck, I struck up a conversation with a VW Jetta driver: 47 to 49 MPG, and he had over, well over, 200,000 miles on it. Without even doing the math (in general higher priced diesel V. gasoline) the Yaris compares well...( in the low 40's, my own results) plus I trust Toyota more then VW!

NICE!!! Yeah, its hard to even FIND off road Diesel here in VA, much less without any dye in it. Its SO funny you mention a VW diesel... I was ON MY WAY to the stealership to BUY a VW diesel that I had ALREADY test driven a couple days earlier but I had read SO many bad things about EVERYTHING other than the motors on these cars that I just didnt feel comfortable doing it. I figured that Id swing by the local Carmax to see what they had first walked right PAST the Yaris that I actually ended up going back and buying 4 days later. Went across the street to the VW, Subaru place and some guy came in with a diesel Jetta and couldnt say enough about how much of a turd it was and thats all it took for me. Went across the street to the Toyota joint, test drove a new Yaris (on my wife's suggestion, because she saw the one at Carmax ), went back to Carmax and bought mine for $5k off of sticker with 12k miles on it.