Anyones dealer recommend non premium fuel?
 

I was getting my check engine light on my 330ci and the dealer couldnt figure it out. They thought it had to do with the CAI. The guy told me to fill up with 87 or 89 once a month. Sure enough the light was gone. Something about the "high-compression" engine or something.

Anyone elses dealer told them this with the X5? Anyone do this currently?

Never heard that. Higher compression= knocks easier= premium fuel. What code did it throw?

It was like a year ago. I dont remember it.

I wouldn't go to 87, but I would go to 89 in cold weather. My dealer uses 89 to cure misfire problems here in cold weather. Your 89 may not be the same as ours here, gasoline varies widely across North America.

Premo vs non-premo has been beaten to a pulp in many
threads.

I run an occasional tank of "89" in cooler Spring and
Fall weather and run it, (89), almost exclusively for long,
one day, 600+ mile road trips. Never a burp, hiccup or miss
in 5 1/2 yrs and 58K miles.

Run whatcha brung...and, yes I can afford premo, lol!
GL,mD

I'm going to come out of the closet here and publicly admit that I've always run midgrade (89) in every BMW I've ever owned since 1986. In 21 years I have literally put over a half million miles on those 4 vehicles (2 3-series, 1 5-series and 1 X5) and have never had an issue running 89 octane.

Figuring that the price differential is typically 10 cents a gallon between midgrade and premium, that adds up to $2500 saved over those 21 years. Not a lot in the grand scheme of things but, as Lincoln used to say, a penny saved is a penny earned.

Just my 2 cents (actually that would be 125,000 cents ;) )

Jeff

What are the benefits to running 89 vs 91? I think i am missing the point.

10 cents a gallon? :dunno:

It may provide for better "running" and easier starting, in
cold weather.

UCrew,
I knew there were some closet 89'ers among the group, besides
JCL & me! :rofl: