EXACTLY, its 1:30$ people...thats nothing!!! alot i better than risking your engine.

wanna hear some else people do to save money? ppl would drive 5-6 miles out of there way to get gas down the street that is 2-3 cents cheaper. and they dont realize that the 5-6 miles spend on driving, totally negates the saving. so in the end they are just wasting time, essaintlly wasting more money *time=money*

 

Are pour in octane boosters ok to use in a MCS? Do they work? If so which one do you guys recomend?

 

I would guess it's probably ok but in reality, from everything I've learned about them they have almost zero effect. I think the most you'll see is an increase of about .5.

So, if you fill up with 89 octane gas and use a bottle of the store bought octane booster, you'll end up with 89.5 octane at best.

You're better off just paying the extra couple of bucks and getting premium gas.

 

Use premium 91 or better, quality brand name unless you know the bulk supplier and they are good.

Stay away from anything with higher than 10% ethanol. It has been known to mess up the seals in the fuel system.

Don

 

I run 91 or higher in all of my cars, even the lawn mower. I get way better mileage in the CRV, and it's a ruttin Honda. The Mercedes has never had any grade lower and the MCS won't even let me stop at a regular or lower pump. Except the diesel, it gets just diesel.

 

 

I have a Justa and my gas door says the same thing however my dealer, Yaletown Mini, insists that I must use 91 octane or higher to correct my surging idle problem. I have put on 2000kms with 91 octane as per the dealer request so that the Mini computer can learn the PROPER fuel for my Justa. Pretty slow computer to take 2000kms to learn I would say. So the 91 octane has not fixed anything.

As for fuel economy on the Justa with 89 vs 91 octane it has made no difference according to my manual calculations. And power, no noticeable difference.

Based on my experience I would personally not hesitate to use 89 octane.

 

I only use 91, but my question about pour in octaine boosters was more about going beyond that. I have always heard alot about the minimum. What about the maximum? There is a filling station in my town that sells from 93 octaine up to 106! No corn of course. So how far can you go in that direction and be safe? I figure 93 is safe enough. I wouldn't want to pay for 100 very often, but there are days my driving can get more "spirited" if you know what I mean.

 

I wish we had 93 around here. My car runs better on it and I get better gas mileage.

 

Minixb Look around the local tracks, I'm sure it's around just not very popular with normal drivers. If you know where the racers hang out you will find good gas. You just gotta find the demand and you will find the supply. I've been in this town a long time and never knew untill today about my new honeyhole.

 

We have 94 at Chevron around here, I usually go that route. I haven't done a mileage comparison with 91 though, I may do that on the next tank and see if there is any difference.

 

Hahaha

 

to increase chances of a warranty fight with Mini/BMW for a few dollars a tank against a $7-10K engine replacement bill on a turbo'ed motor.

Not.

 

Amazing how some people still refuse to understand what an octane rating is, and what it means. I don't understand why people are sometimes so proud of being so ignorant.

 

OK, I bought an R56 base model - no "S" and no turbo - so my data is off-topic, but I've been keeping a little MINI MPG blog here:

http://garywright.smugmug.com/MINICo...15965470_wuK39

I really can't comment much on performance or engine life - but, so far I'm not seeing much difference in MPG between 87 and 91 AKI in my base model - only about 2.2% better from Premium.

I completely agree that the cost difference between regular and premium is not even an issue for MINI drivers; but whether we can afford to burn more gas is a different issue from whether we should burn more gas than necessary, even if we can afford it. My tests, so far, do not support the claims that there is very much difference in MPGs or even performance - at least not in my engine.

I completely agree that corn based ethanol is a dead-end from every perspective (excepting farm state politicians), but ethanol in our gasoline may become an unavoidable fact of life for MINI drivers in some locations - at least until we start to run out of food. I am still testing the claim that 10% ethanol yields lower MPGs (results to follow).

 

Are u leasing? Because I dont think anyone who bought the car outright would even bother asking this question.

 

For $2 or $3 a tank difference, why ask... PREMIUM !!!