I know that these cars require mid-grade fuel, but I have driven my
318is (93) on regular with zero problems. I had a 79 323i and it would
knock like heck if I didn't use at least 90 Octain. I think it is a
little of trial and error. The difference in price between the grades
is less important than the mpg the vehicle gets. That is why I went
with the 318 over the 325. You have to figure, ten cents more per
gallon averages out to about $1.40 per tank. If you get 30 mpg vs 18,
well that is the big difference. Hope this helps
Well, on average, in Canadian $$, a car with the same fuel economy one
running regular and one super, well...
$3.85 CAD more per tank with super... works out to about $300 extra/year
for me in fuel expenses.. not that much, but, every bit counts (I drive a
Cheers and thanks.
BMW recommends 91 octane but usually states that 87 may be used with reduced
power & economy, so you might try charting your fuel consumption with both
87 and 93 octane. I'll wager that it's at least 10% better with the
premium, so then it's a question of whether the increased consumption with
87 is worth the per litre cost savings.
In my area of the U.S, mid-grade is only 89 and doesn't that much less than
premium. And the $$ difference between 87 and 93 is often only 5~7%, so the
higher octane is the better buy for me. As they say, YMMV!
Quite good advice, Tom. One point to consider is that the pump rating
for a particular fuel grade is the *minimum* octane that will come out
of that pump. In most cases the actual octane will be marginally
higher. How much higher will vary by brand, location, phase of the
By trial and error you could find a brand that has fuel that your car
likes (in your location and at this time) without retarding the timing
and the attendant loss in mileage that comes with that.
Well, basically, you can make big power with smaller displacement with
higher compression, or you can go the route of the 4.6L Mustang engine...
300HP on regular.. Chrysler 300C 5.7L = 350HP on regular or the 6.1L 400HP,
Chevy 6.0L LS2 I believe runs regular 400HP.
I'm not comparing them to BMW in any way, just that these engines put out
decent hp for pump gas, and seriously low tech except the MDS Chrysler
engine and Mustang (finally!!)
Dori A Schmetterling wrote:
> Whoever has time for that needs to get a life...
What time does it take to stop at a couple of different gas stations?
You may actually *save* time by not driving out of you way to find the
same brand all the time. In any case, it does not take any time, unless
you are talking about the huge amount of time it takes to write down
when you filled it... which I do anyway to keep track of mileage. So
the added job of writing down fuel brand and pump octane would take
what? about 3-4 seconds.
...guess I need to get a life.
Britain's (and West Europe's) forecourts are dominated by Shell, BP and
Do I care (on tech grounds) which one I use? Only question whether it is
worthwhile buying the supermarket stuff.
For direct contact replace nospam with schmetterling
"Fred W" <Malt_Hound@*spam-me-not*yahoo.com> wrote in message
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