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Show Of Hands April 14th, 2016 6:38pm

Do you put premium fuel in your vehicle, or a lower octane?

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badattitude no place like home
04/16/16 4:50 pm

Premium, but only because it's required. Don't put anything other than what the manufacturer requires. Higher octane in a regular car just wastes money. And regular in a high performance engine could damage it.

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jamjay Atlanta, Ga
04/16/16 9:30 am

The CooperS Loves it's High Octane Fuel!

tbelltwin2 Georgia
04/25/16 9:15 am

I have an 07 Cooper S with the turbo

wearemonkeys77 Lest We Forget... Hodor
04/16/16 8:57 am

How the hell do people not know this? It's what ever your career requires.

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corino Utah
04/16/16 7:35 am

"Premium" hah! Octane measures you gasoline's combustibility. High octane gas in a standard car is bad for your car.

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badattitude no place like home
04/16/16 4:52 pm

It definitely wastes money. I'm not sure it'll hurt the engine though. Can you let me know if it does?

fredd TrumpLand
04/15/16 4:52 pm

Engine does not require anything beyond regular, so it would be a waste of money to use anything else.

evilz28 Chicago, IL
04/15/16 3:02 pm

Lemme break it down. ONLY PUT IN WHAT YOUR CAR REQUIRES. High compression engines (i.e. sbc lt1/ls1) need premium (higher octane) to reduce knock and prevent pre-detonation to maximize power. Reg. Can be put into these engines but your PCM will retard timing and give you worsw gas mileage. Your (insert economy car) doesnt need this. Use regular 87 octane (this isnt crap gas) its made for your car. There is lower compression so no need to worry about pre-detonation. Adding premium wont give you more power nor hurt the motor, just your wallet.

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fredd TrumpLand
04/15/16 4:58 pm

What she/he said. I'd only add that while compression is a major factor, it's not the only one. Careful design allows modern engines to have higher compression ratios than older engines on the same fuel. And the equation is changed by superchargers for instance.

mikeyDe Marine Corps
04/15/16 1:17 pm

Which car? My mustang gets only the best. My avenger gets the crap gas.

kjs Minnesota
04/15/16 8:30 am

Have too. We have a Lexus 430. It loves premium. Gobbles it up like crazy.

badattitude no place like home
04/16/16 4:54 pm

Really, I've never seen a manual say that. What kind of truck?

ProfCluck Prospect, KY
04/15/16 6:02 am

Only put in premium if your car says to. Otherwise it's a waste of cash

Torfin Never Behind
04/15/16 3:54 am

Premium in my motorcycle and the cheap stuff in the other vehicles

ELATeacher
04/15/16 2:55 am

Neither, I have not had to put gas in my car for 3 years....it takes diesel. (2012 VW Golf TDI)

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FollowYourBliss Never Happy, Ever After
04/15/16 12:36 am

I do. I drive a turbocharged car and the engine requires it. If it's not required, or even recommended then you are wasting your money. Plain and simple.

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fxdwg
04/14/16 10:52 pm

I have been a mechanic of all kinds of vehicles for 20 years now and have had many many motors apart in that time frame. Believe me your mechanic knows what octane of fuel you use by what it looks like inside your motor. Premium burns way cleaner than regular grade fuel.

SD37 South Dakota
04/14/16 8:20 pm

Ford Excursion 7.3 Diesel

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rons screw politicians
04/14/16 8:11 pm

Read your manual for fuel recommendations. Hi-test does nothing if your car calls for regular. I may cause a problem.

Diogenes FreeMeBe
04/14/16 8:09 pm

I want my leaded gas back! Higher octane, especially with a splash of unleaded! Sunoco FTW! 'Murica for Trump 2016! ✌🏼️

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badattitude no place like home
04/16/16 4:56 pm

You know why they don't have it anymore right?

Diogenes FreeMeBe
04/16/16 6:10 pm

The good old catalytic converter (NOT) and the negative health effects of lead. Something I'm missing?

badattitude no place like home
04/16/16 6:13 pm

Right. To get the converter to work, they had to have an O2 sensor to keep the mixture constant with varying altitude and temperature. But lead destroyed the O2 sensors.

Diogenes FreeMeBe
04/16/16 6:43 pm

And unleaded was born now booting octane with alcohol. Darn, those pesky knocks. 😎

badattitude no place like home
04/16/16 6:50 pm

Avgas still has lead. But it's really expensive. And the vapor point is different.

Diogenes FreeMeBe
04/16/16 7:24 pm

My local petrol station never seems to keep it around. I don't have the engine for it either. I'd probably blow a ring or bend a valve or more. Not pretty. I'm good with what's out there as long as they don't go above 10% EtOH as seems to be a rising trend. Let the poor countries eat their corn!

badattitude no place like home
04/16/16 8:58 pm

Oh. Okay. I've only ever heard English people call them petrol stations. No worries. I lived on base in San Antonio. My brother was born there.

Diogenes FreeMeBe
04/17/16 9:51 am

Air Force? Still in SA? We're headed to Hyatt Hill Country around Memorial Day.

fredd TrumpLand
04/18/16 10:20 am

Scottish people also call them petrol stations. ;)

Gunfighter06 Iowa, since 1846
04/14/16 8:05 pm

My immaculately maintained 2001 Oldsmobile Aurora V8 requires premium, and boy does that old girl like to drink it! It stings my wallet, but it's a sacrifice of love.

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MrTony Colorado
04/14/16 7:29 pm

Porsche gets premium, Subaru gets regular.

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VirginiaVoter Virginia
04/14/16 7:20 pm

Volvo gets premium(their recommendation). F150 gets regular. Go kart gets premium

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Zod Above Pugetropolis
04/14/16 6:58 pm

It depends on which vehicle. Three of the four bikes get premium, as does my MINI. No choice on the bikes that require 91 octane. The MINI only requires 89, so I could use mid grade if a particular station has it (many here don't), but the negligible price difference doesn't make worth remembering to look for it. The vehicles that can run on 87 octane get regular, everything else gets premium.

Liberty 4,032,064
04/14/16 6:54 pm

It depends on which station I use. Out of the two I use primarily, one is premium and one is "mid-grade."

cornybread The Large Malus Fruit
04/14/16 6:51 pm

I drive a Honda. I mean, it's a v6, but still. It doesn't need the super expensive gas. Just the already expensive regular gas.

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alkie New York
04/14/16 6:46 pm

My Audi requires premium πŸ‡©πŸ‡ͺ

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EarlyBird Portland
04/14/16 6:08 pm

My SUV doesn't require premium.

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gonzoboy Arizona
04/14/16 5:44 pm

It's all I've ever used.

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nnifer Alpha Quadrant
04/16/16 5:27 pm

I drive a Mini Cooper. It's turbo, I think that's why it requires mid grade

badattitude no place like home
04/16/16 5:41 pm

That's a premium engine. I had one. It's made by BMW. You should definitely put premium in there. You might damage the engine.

nnifer Alpha Quadrant
04/16/16 6:21 pm

You're right. I will move from mid grade to premium. I absolutely love my car

badattitude no place like home
04/16/16 6:21 pm

Premium fuel (defined as 91 in the USA)is required for the 2007 turbo S. I am 90% certain it is required for the 2006 and earlier supercharged S, too.
You do not want to mess about with this. Using octane lower than the requirement can damage an engine. It is not uncommon for high-strung engines like these to require high octane. That said, I'm sure you might find MINI owner's who are doing it anyway. But they are running a risk with consequences that far outweigh the savings in fuel cost.
Now if you ever see the word "recommended" in an owner's manual, that is different. There are many instances of less-stressed engines that can run just fine on 87, but won't develop their advertised horsepower and achieve the advertised 0-60 unless they are run on 91. So those manufacturers will say something like "91 recommended for maximum performance." Right after that, they might state the minumum octane as 87. The new Cadillac CTS is one such car.

badattitude no place like home
04/16/16 6:22 pm

But I'm pretty sure the "S" MINIs use the word "required." Check the wording carefully.

badattitude no place like home
04/16/16 6:25 pm

My 2007 Mini Cooper S had a stage 5 Dynan kit. 225 horsepower. No Mini in town could beat it. Incredible acceleration. But a big FedEx truck destroyed it. So sad.

nnifer Alpha Quadrant
04/16/16 6:26 pm

I'm using the required minimum, but should give my baby the better stuff. I get 39 mpg. I shouldn't be cheap

nnifer Alpha Quadrant
04/16/16 6:41 pm

91 is mid where I live. 93 is premium

badattitude no place like home
04/16/16 6:42 pm

That's interesting. Hmm. Well. Save some money.

Sicilian New Orleans, La
04/14/16 5:41 pm

Premium. Only because it requires it. I'll only fill up at Costco though. It's $1.99 here at Costco and the cheapest "normal" gas stations like Shell and Exxon sell their premium for about $2.60 at the moment. So yea, I'll gladly pass those up.

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anniepoops wisco fever
04/14/16 5:40 pm

I put premium in accidentally two weeks ago. 😐

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alkie New York
04/14/16 6:46 pm

I know someone who put diesel in their brand new car and destroyed the engine lmao

cornybread The Large Malus Fruit
04/14/16 6:52 pm

I assume one should only put diesel in a diesel engine. If hate to be that personπŸ˜‚

badattitude no place like home
04/16/16 5:02 pm

Yeah, diesel is similar to kerosene and jet fuel. It's only 35 octane. The fuel ignites before well before top dead center from compression and detonates in the cylinder. Under full power it would only take minutes to turn your pistons to powder. Many piston engine airplanes have been miss-fueled with jet fuel and the engine failed just after takeoff killing everyone onboard. Terrible mistake.

jvc1133 61535
04/14/16 5:35 pm

Waste money

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gocubsgo
04/14/16 7:02 pm

My car requires it, it would be a waste of money to NOT use it.

jvc1133 61535
04/14/16 7:03 pm

Too bad

biker4life Arizona
04/14/16 5:33 pm

I put premium fuel in everything that takes gasoline including lawn mowers and weed eaters.

arecnation
04/14/16 6:39 pm

It's been proven time and time again that if the vehicle does not require premium it literally does nothing to use it. Literally nothing at all, well except take your money

biker4life Arizona
04/14/16 6:47 pm

It's not your money, why are you even worried about it?

badattitude no place like home
04/16/16 5:04 pm

We aren't worried about you wasting your money. We just are wondering why you want too?

biker4life Arizona
04/16/16 8:51 pm

I'm not. My BMW requires high octane, my Harley prefers high octane, my truck likes it, plus super has a fuel stabilizer in it to help give it a longer shelf life than a few weeks.

badattitude no place like home
04/16/16 8:54 pm

Cool. Nice stuff. But a low compression side valve lawn mower engine? You won't get any benefit out of premium for that. The Stabill is all you need. That stuff is amazing.

biker4life Arizona
04/16/16 8:56 pm

Except the fact that carburetor engines work better with a higher octane especially when using this shitty ethanol gas.

RJ1969 SoCal
04/14/16 5:33 pm

Engine timing requires premium.

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