I've never owed a car that required Premium gas. I currently drive a
Lexus ES 300, and it takes regular. I want to step up to a LS430, but
just don't know if it "needs" premium.
I work for a limousine company and our fleet is all Lincoln Town Cars.
All we ever put in them is regular, and they work fine.
Does anyone use regular in their LS430.
Just wondering before I buy.
The manual says use premium, but that regular can be used without
damaging the engine. That's what the manual for my 94 says, anyway.
I'd think you could easily go to the dealer and ask to see a manual. I
never buy a car without reading the owner's manual, just to see about
things like that.
I have a better answer than all of you, but it requires a little more work.
I put in 1 part 87 octane to 1 part 93 octane...and tilt the mix to get
about 91 octane which is what the car requires. I can tell from looking at
any point on the gas gauge how many gallons needed to fill up (this took a
some time and experimentation). I usually fill at half tank where it needs
11 gallons to fil. I'll put in 6 gallons of 93 octane then the balance of 87
octane. It requires two different credit cards at the pump, too, because
most pumps will not work the second time if you use the same credit
card...the pump thinks something is wrong. And if you use cash, you have to
fill, pay, then fill and pay again (so I don't use cash).
One response here said if you can't afford the fine fuel you can't afford
the fine car. My approach is different: It's being value-conscious like this
that allows me to afford the fine car!
You are kidding, right?
Let's say premium gas is $0.25 higher than regular. You are saving
$0.125/gallon. On a 20-gallon tank, you are saving $2.50. How long do
you have to do this before you can afford a more expensive car.
You have to be an engineer -- probably software, right?
Hey, do you also mix half diet and half regular soda because your
engine can handle 55 calories but not 110?
My father-in-law used to check the ads in the paper every Saturday
morning and then drive clear across town to save 5 cents on a can of
beans. We used to kid him about the 10 cents of gas he spent to save
the 1, but he was raised in the depression and couldn't do it any
It's a free country.
Owner of a 1999 LS400, purchased certified in 2002
and a 2001 RX 300, purchased certified in 2003
For email, use Usenet-20031220 at spamex.com
Don't know where you guys are, but every gas station in Texas has 93 octane
Premium. And 91 octane Mid-Grade is what the professor is trying to
formulate. Most have the mid grade, also.
BTW, my wife's RX300 runs fine on 87 octane regular.
D.D., you are just trying *too* hard!
Around here, Pittsburgh, it's 87, 89 and 93. Yet the 89 gas is priced
halfway between 87 and 93...but is not half the octane difference. So, as I
posted, I "create" my own 90-91 octane for a price about halfway between 87
and 93. Yeah, I'm a cheap SOB, but I FEEL better about it!
This has been tested (repeatedly). Performance, on average, drops about the
same amount you save (15%). If you can't tell the difference when a car
makes 15% less power, then yes, probably makes sense to burn regular. But
on has to ask: if you're not caring about performance to this degree, why
did you bother paying a lot more for a high performance car in the first
place? You can save a lot more than 15% gas money driving an Avalon.
Tested by who? Under what circumstances? We're not talking about numbers
here, we're talking about real world driving experience. I'm simply saying
that under normal (whatever that means) driving conditions, I cannot tell
any difference between the regular and premium fuel. As I stated in my
original e-mail, if you hook up a dynamometer to the car, you probably will
easily measure and can report the difference. So what?
BTW -- I don't only buy LS430's for their performance. Yes, it's a factor,
but there are a LOT more features to the car than just "GO". If I wanted a
"GO" car, I'd buy a Ferrari (which has NO other features other than "GO").
...and the beat goes on ...
Read the manual that comes with the car. Then read the WARRANTY. Most
warranties will be VOIDED if you don't use the fuel (octane) prescribed
for your car. If you have engine problems that are in any way related
to the fuel system..........you will be on your own. The warranty will
not cover it.
That's just plain wrong. How the heck would they know what kind of fuel you
put in the car? You really think they're going to extract some fuel from
the tank and test it to determine? Yeah, they've got nothing better to do
The MB computer that they hook up to your engine everytime you go in for
service specifies fuel usage characteristics, including the average
octane. It is quite easy for MB to determine the octane of the fuel you
have been using.
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