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  1. BMW Tuning Forum
    Greetings, I understand how engines can detect knock and then reduce the timing, that makes perfect sense, like if you put low RON grade fuel in and it knocks, it can detect this and reduce the timing to compensate. What I struggle to understand though is how it increases the timing when you...
  2. BMW Tuning Forum
    Hi all, what octane fuel do most of you run on the 3.0 straight 6 ? 2001 model. Book says 95 to 97. Are 98 and 99 a viable option or not ?
  3. BMW 3 Series Forum - Technical Talk on the BMW E46
    I have noticed other members stating they use the high grades of petrol (i.e. Vpower) which are on average 10 pence more expensive than regular unleaded. I can understand this for larger engines. Is it worth the expense on a 2003 318I with 70K on the clock? What would I get? slightly better...
  4. General BMW Discussions
    Hi All, May be a daft question but will it do damage to my engine running it on something like shell v-power which has a higher octane (97 or 99). There are a couple of reasons why i was thinking this... Firstly a few people all have said to me they found (admittingly with higher performance...
  5. BMW 3 Series Forum - Technical Talk on the BMW E21
    Hi. mine is a e36 95 318is (german spec). here in my country are 2 types of fuel, 87 octane and 80 octane. I have always used 87 octane and got crappy 16 mpg. this weekend i didnt have a choice and filled the tank with 80 octane fuel and i got 22 mpg. 1. will 80 octane fuel damage the engine...
  6. General BMW Discussions
    I have an E46 M3 which I always run on V-Power, it doesn't seem to even like the 97RON fuels out there. Anyway... Im back home in Shetland and the only petrol is 95RON so wondering if any of you are aware if there is any octane booster which is worth it?
  7. BMW Tuning Forum
    should i use 95 octane or 98 in my 316i es 2004 will i notice the difference
  8. General BMW Discussions
    My suspisions about these things were proved correct when I watched fifth gear perform a scientific test with a car. They used three or four different liquid additives that claimed to boost performance and all that crap, only to find out that they ALL REDUCED power output by at least 2 bhp...
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