Ah. I feel retarded now! Math never was my strong suite!

 

Always and religiously Shell 93. And once in a blue moon 94 from Sunoco.

 

My manual recommends 93 and since my family's had a car die from using the wrong fuel in the past, I'm gonna keep using 93. Saving a few bucks is not worth the potential engine damage, especially considering the hit to performance and fuel efficiency.

 

No worries Astro. You wronte it when you had too much eggnog.

 

I can't believe people would want to save a few cents per gallon that bad. Cut corners someplace else.

Don't run premium gas in a car that needs regular (just pollutes more.) and don't run less than premium in a car that requires premium.

The only difference in gas is the flash point. Premium has a higher temperature before it ignites. Regular ignites quicker and for that reason burns cleaner. Neither fuel is "better" than the other. Different vehicles have different requirements. Run the fuel that is correct for your vehicle.

 

I think you meant don't be cheap.

 

my cooper runs best with 91, it is a 10 1/2 to 1 compression motor. high pressure motors need 91.

 

I recently bought a 2010 mini "cooper" for which the manual states ok to use 87. The dealer says 91. Since this car came off lease (great deal), my guess is the lessee used 87. The car runs fine. However, would it help to put prem in the car every 3-4 tanks to maybe clean the engine? Not sure.

 

I agree. My 2010 mini is the base car and the manual "recommends" prem but also states that 87 for my car is OK and will not result in shorter engine life. Its a little confusing. My dealer is emphatic about prem.

 

Putting math aside, fill the car at 3 lit bars and it will take about 11 + gals leaving you with just under 2 gals remaining. Filling at 1 lit bar means you're on fumes and bad for the engine. The mini fuel gauge is a problem and you have to live with it and adjust to it. There is no fix.

 

Your car has a knock sensor. This will effectively compensate for poor/low octane fuel. The cost is performance and efficiency. I have found by experience over scores of tanks fuel that E0 premium fuel has returned, in my situation and in my car, fuel mileage that more than compensates for the additional cost of the fuel. It is like the premium gas pump is paying me to but that fuel.

 

Tanks!

 

I M considering maybe using Costco gas to lower my fuel cost. So I contacted Costco and here is their response.

As a comparison, you may recognize the term "Top Tier." *In order to qualify for Top Tier an additive must contain about three times the EPA detergent requirement, and Costco's Clean Power dosage is five times the requirement. *However, the physical quantity of additive is only one measure. *The quality of the detergent can affect the amount of additive needed to meet the government requirement. *The EPA standard is performance based, i.e., they require only the amount needed to keep engines at a certain level of cleanliness. *Costco has tested our Kirkland Signature Clean Power detergent so our "5x" claim is performance-based.

Another Top Tier requirement is that it be available in all a company's fuel nation-wide. *Costco does not yet have Clean Power installed at all of our U.S. gas stations. *We plan to do so as fast as we can, at which time we will investigate whether to seek the official "Top Tier" designation. *The Top Tier program is administered by General Motors, and supported by several other automakers such as Toyota, Honda, BMW, VW, and Audi. *Here is a link to their website:*http://www.toptiergas.com/retailers.html

Most detergent additives use similar ingredients, and have the same effect in keeping your engine clean. *As I said above, Costco adds five times the government minimum requirement for detergent additive, which provided the maximum cleaning impact during our engine testing. *The only brand that uses as much additive as Costco is*Shell's V-power,*which is available in their premium fuel only. (V is the Roman numeral for 5, which stands for five times the government requirement). *Our KS Clean Power additive is made by one of the leading additive manufacturers in the U.S. and our*formula*is independently registered with the EPA. *


.....i will probably try it out in my other non mini to see the effects

 

By religiously do you mean saying "grace" each time?

 

Of course and then I say "Amen".

 

Have a nice day. Ciao.

 

All that just to respond back...anyways.


I'm curious if other people use or used 94 octane from Sunoco?

 

We put 91 in our Clubman S as that's the highest you can buy in our area of California. 91 octane gas is roughly .20 cents a gallon more expensive than 87 and .10 cents more than 89. So if we fill up our car and put 10 gallons of 91 in it costs us $2 more a fill-up. My wife spends more than that getting her Latte.

 

Manual says minimum 89 and recommended is 91 for my 2012 base. I use 93 octane only.

 

Bingo !
FWIW, I can always tell when my wife fills out our MCS with regular 87 octane. The mileage drops by ~5-10%, and so does the power.

Mileage drop itself is not enough to compensate for the extra cost of 91 or 93 gas, but it I was that much of a cheap-***, I would have bought a Justa to begin with. If you spent the extra change on the turbo engine, don't short change yourself on power and fill up with the highest octane fuel you can find!

YMMV,
a

 

Never mind spelling...

 

How so? So long as the fuel pump isn't sucking air, there's no possibility of damaging the engine.

I suppose that depends on the year and/or specific car - while my fuel gauge is very non-linear, I find that I can run down to miles-to-go in the teens with no problem. A bit spooky to convert the miles to go into a mental image of how much gas is in the tank though.

 

Oh geeeez! That's x2 retarded! Lol

Well, I'm stuck with overpriced 91 octane here in SD. Def got worse mileage when I could only get 91. For some strange reason, I started getting Better mileage once I got out of GA?!... Makes me wonder, if FL is doing something to the gas, or if the air density makes a better mixture in the middle of the country...

 

I'm wondering how the Justa owners are going to take that?

 

I agree with you here. From what I've experienced, the numbers go like this... (Not official numbers):

I get 400 miles to the full tank using 91. So if I get 5% less using 87 that would be 380 Miles. Now 20 miles is about 2/3 a gallon so we'll say about $2.60 (I live in California). I save about $0.20 a gallon so on a full tank of 87, that's about $2.60 savings. So to get 400 miles like I'd get on 91, I'd have to buy $2.60 more gas from a fill up with 87.

Maybe my math is off, but I'm using less gas with 91 and getting better performance... with the big picture, I'll stick with 91.