regular unleaded gas
Originally posted by theblue
just ask youself if you think they would tell you to use premium if they didn't need to.
just ask youself if you think they would tell you to use premium if they didn't need to.
I ran all grades of gas from 87, 89 and 93 octane. I tested the 93 oct for 1 month and showed no result at all. not even in gas mileage or response.
I just went back to 87 oct and still can chirp my gears and gas milage is no diffference.
I say run MID grade at least and then go back to regular grade and see if you see an difference. I am sure you will be back to paying the cheapest.
IMHO.. if I can pay 18 buks to fill up my ride versus paying 24bucks for higher premium gas... i say hell nah... I will just pay the 18 bucks. Oh and my car has almost 90K and got it at 60K and no probs what so ever
good luck man!
I just went back to 87 oct and still can chirp my gears and gas milage is no diffference.
I say run MID grade at least and then go back to regular grade and see if you see an difference. I am sure you will be back to paying the cheapest.
IMHO.. if I can pay 18 buks to fill up my ride versus paying 24bucks for higher premium gas... i say hell nah... I will just pay the 18 bucks. Oh and my car has almost 90K and got it at 60K and no probs what so ever
good luck man!
Please read the 4th gen FAQ and also do a search.
My opinion: don't keep switching back and forth because your engine is more prone to knocking in between high octane - low octane switches. The engine has to knock first, before the ignition timing is adjusted. If you keep switching back and forth, how many times are you going to knock?
If you wanna be cheap, get lower gas mileage and some power loss, go 87. You might save a few pennies.
My opinion: don't keep switching back and forth because your engine is more prone to knocking in between high octane - low octane switches. The engine has to knock first, before the ignition timing is adjusted. If you keep switching back and forth, how many times are you going to knock?

If you wanna be cheap, get lower gas mileage and some power loss, go 87. You might save a few pennies.
Originally posted by JsL
In my fuel door, it says "Premium unleaded recommended for maximum performance." IMO, I feel a difference when I fill up with 91, but with 91 costing 1.99/gal, I currently use 89.
In my fuel door, it says "Premium unleaded recommended for maximum performance." IMO, I feel a difference when I fill up with 91, but with 91 costing 1.99/gal, I currently use 89.
What's next? Going to narrower 70-series tires? They're cheaper, too - and less rolling resistance will save you even more money.
If you buy a high performance/luxury car, be prepared to spend a little more than you would on a Chevy Malibu.
Originally posted by MChapel
...penny wise and pound foolish. You save what? $2or$3 per fill-up once a week? That's $100/$150 a year.
What's next? Going to narrower 70-series tires? They're cheaper, too - and less rolling resistance will save you even more money.
If you buy a high performance/luxury car, be prepared to spend a little more than you would on a Chevy Malibu.
...penny wise and pound foolish. You save what? $2or$3 per fill-up once a week? That's $100/$150 a year.
What's next? Going to narrower 70-series tires? They're cheaper, too - and less rolling resistance will save you even more money.
If you buy a high performance/luxury car, be prepared to spend a little more than you would on a Chevy Malibu.
In the end, its only about 10-20$ a month, and COULD save you much
more ca$h if something goes wrong...a bad knock sensor is over $100!
FLO_BOY
Originally posted by JsL
In my fuel door, it says "Premium unleaded recommended for maximum performance." IMO, I feel a difference when I fill up with 91, but with 91 costing 1.99/gal, I currently use 89.
In my fuel door, it says "Premium unleaded recommended for maximum performance." IMO, I feel a difference when I fill up with 91, but with 91 costing 1.99/gal, I currently use 89.
I always fuel w/ Mobil 93 (before was Amoco 93, saw a huge benefit w/ Mobil), gives my max real nice pickup & keeps everything clean inside

It's entirely up to you to put whatever octane of gas you want in your max but personally I put Premium (Mobil) since the VQ was designed for it
Re: Knock Knock
Originally posted by njmaxseltd
Who is it?
89 octane gas
Why are you knocking?
Because I burn to quickly for the VQ motor
Who is it?
89 octane gas
Why are you knocking?
Because I burn to quickly for the VQ motor
Just use premium it doesn't really make that much of a difference, unless you live in Chicago!
Originally posted by Wht98SE
Premium here in metro Detroit isn't cheap or expensive, usually ranges from $1.61 to $1.79 per gallon depending on the gas station.
Premium here in metro Detroit isn't cheap or expensive, usually ranges from $1.61 to $1.79 per gallon depending on the gas station.
And Speedway is usually among the gas stations with the lowest price.
In my manual, if I'm not mistaken, it states that you can use whatever grade you want, but you may notice a loss of performance with lower grade fuels. I don't see where it says that 89 or 87 will damage your engine....
Originally posted by Speebs
In my manual, if I'm not mistaken, it states that you can use whatever grade you want, but you may notice a loss of performance with lower grade fuels. I don't see where it says that 89 or 87 will damage your engine....
In my manual, if I'm not mistaken, it states that you can use whatever grade you want, but you may notice a loss of performance with lower grade fuels. I don't see where it says that 89 or 87 will damage your engine....
Exactly. The people who post that not using super will damage your engine are incorrect. It won't harm your engine, but it will reduce performance. How much reduction is not really known. Personally I do not feel any performance decrease using regular. I use super anyways though, for peace of mind that I will get every last drop of power from the engine, even though I know that 95% of the time I will never notice the difference.
This topic has been beaten to death...just check the hundreds of other posts on this topic...regular vs. super. If using regular cause the VQ to suffer major problems, I have never read about it, and I have been on the BBS longer than most people here.
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