![]() ![]() I think it is likely that SOME premium gasoline's WILL give LOWER gas mileage than a regular gasoline will.assuming the engine ran properly on Regular grade gasoline. THE ENERGY CONTENT OF FUEL ALSO VARIES WITH THE SEASONAL CHANGES OF THE FUEL. or even likely.to be a small amount LOWER than for Regular. The output (BTU) per gallon of Premium gasoline is potentially. Gasoline burns at about the same rate under normal conditions, that is, not detonating. There is an old controversy about possible increases in combustion chamber temperatures,Įtc., when using premium gasoline's in lower compression BMW airhead engines, where higher octane is supposedly not needed. The dispensing companies don't offer this information easily, & 1/4 gallon or more is VERY common.ĢB. Your fuel may be diluted by a modest quantity of lower octane fuel remaining from the last om the internal valve, pump, etc.through the hose, etc.somewhat depending on the type of equipment in use. If you have a high compression ratio Airhead (modified later type or, 1979 & earlier type with stock compression ratio), & you use high octane fuel, be advised that when fueling up at a service station, it is considerably better NOT to fuel up at the type of 'pump' that has only ONE nozzle/hose. & MIGHT be worthwhile for you to peruse, even if you don't have one of these carburetors, which was used only on the R90S Airheads.ĢA. It explains in great detail not just how the Dell'Orto works, but is applicable in general to all carburetors. An extensive article on Dell'Orto's, covering all their carburetors. >An article that describes Lead Substitutes, in depth:ġ. >Refer to article #1A, #1B, & #75 for more information. Fuel additives.įitting other ats & fitment with various tanks. History of this website and how I run it.and, donating.įuel system in your Airhead BMW Motorcycle. Snowbum's BMW Motorcycle Repair & Information WebsiteĬlicking on them at every visit helps support this website!Ĭlicking on something inside an article helps even more!
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