boci 22 Posted December 6, 2016 its not his car It’s rep BMW from Toro Share this post Link to post Share on other sites
GenTLe 1,509 Posted December 10, 2016 Mine too, higher the Octane the cleaner the burn.. Not true Dal, the only advantage of a higher octane is less propensity to knock or ping allowing for the timing to be set with more advance thus producing a longer power stroke and more efficient (and complete) use of the energy contained in the fuel. Higher octane fuel is (contrary to popular belief) not higher in energy and thus more powerful, cleaner burning or any of the other mythical attributes mistakenly given it. A good example is E10 or E85 both of which have high octane ratings (E85 is around 120) but contain less energy per ml than petrol. ∆∆∆ This! You only need high octane fuel when you go up with compression ratio and/or anticipated spark (this last one is useful when you have high revving engines). Eventually if you are using a poor mix (too much air in relation to the fuel). High octane is just good to avoid auto detonation. The mix of air and fuel must burn, not detonate, otherwise you can have all sorts of problems. Like this (2T engine in this case): Share this post Link to post Share on other sites
SamsonAusKognito 31 Posted December 10, 2016 its not his car It’s rep BMW from Toro On special offer with rep Prius Share this post Link to post Share on other sites
