BimmerFest BMW Forum banner

Octane Boosters

2293 Views 22 Replies 10 Participants Last post by  Pinecone
Anyone tried these? I tried them on motorcycles in another life...not sure if I want to experiment with my passenger vehicles :confused: Anyway, after reading Hacks thread on his 100 octane fuel, just curious if anyones had any experiences with Octane boosters.
1 - 1 of 23 Posts
Re: Actually, no....

I tried this last year with my 97 540i. I bought a 5-gallon can of Union 76, 100 octane racing fuel and dumped it into the tank with about three gallons of 91 octane fuel. It made no performance difference, although I could swear the engine ran smoother.

I posted on, and it resulted in some discussion, but unfortunately the archive search is still broken.

As mentioned here, I'm told you would need to chip your car of otherwise modify the engine to take advantage of higher octane fuel.

1 - 1 of 23 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.