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Maintenance & Repair What about fuel types & gas mileage?
281 messages, Last post on Sep 22, 2009 at 3:52 PM
You are in the Maintenance & Repair Forum. Your Host is mr_shiftright
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I ran two tankfuls of premium fuel in my lowly Scion and actually LOWERED my fuel mileage by 2 mpg. Go figure....
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Replying to: Mr_Shiftright (Jun 15, 2006 1:33 pm)  Best Regards, Shipo
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Replying to: shipo (Jun 15, 2006 3:05 pm) |
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Replying to: Mr_Shiftright (Jun 15, 2006 1:33 pm)
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Replying to: smokey75 (Jun 17, 2006 5:58 pm)
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Replying to: wai (Jun 18, 2006 3:58 am) The only correct answer here is, "It depends." If any given engine is optimized for 91 octane but has ignition control electronics that allow it to retard the spark event for more volatile fuels (lower octane) and/or advance the spark event for less volatile fuels (higher octane), then the "Minimum Octane" in the manual might could well be 87. That having been said, that same engine will lose both performance and economy when anything less than 91 is being used. The flip side of course is when any given engine is optimized for any given octane rating and then a higher octane fuel is used. In this scenario, performance and fuel economy will suffer if the engine isn't able to advance the spark event sufficiently to start the fuel burn early enough. If, however, the engine can advance the timing, economy and power may actually improve slightly, of course, not as much as an engine optimized to burn said higher octane fuel. Best Regards, Shipo
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Replying to: shipo (Jun 18, 2006 9:30 am)
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Replying to: wai (Jun 21, 2006 11:39 am) I had a VR6 in my 1995 Passat and on that engine I don't remember it being at all sensitive to fuel above 91 or 92 octane. Sorry I can't be more help than that. Best Regards, Shipo |
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I'm not sure if this is the right forum but hopefully someone can educate me on gasoline providers. I live in an area where the gas stations are dominated by the local convenience stores, Rutter's, Sheetz, Tom's, etc. Reading a few forums, the discussion of top tiers gasoline providers popped up. It dawned on me that none of these providers are in my area (South Central PA) or are they? Is there a way to find out who provides the gas for these stations? Obviously Rutter's and Sheetz don't own refineries and must buy from someone. |
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