E85, anyone?

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Originally Posted by johntins

My 2005 Ford cannot run anything more than E10, according to the stealer. I'm not game to try.

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Thats ethanol compatible. there are some vehicles that specify NO ethanol. the reason you are limited to E10 is not because it cant have the fuel physically in the lines or engine but due to other limiting factors as Toxic avanger has indicated.

Proper multifuel engines have much broader "maps" and things like higher flow fuel pumps larger injectors, wider IAC flow rate ranges and all the other stuff that goes with.

for the specific application that Pedro wants it for (initial start/warmup, presumably emergency fuel for if he has an LPG issue or runs out) prior to flicking over to run on LPG the disadvantage of power loss isnt really going to be noticable or an issue. The big advantage for him is that the ECUs "adaption" on startup is going to be nearer to what it needs to be on LPG. although its worth noting that the quality control on the Octane rating of LPG is now a bit looser, while the minimum guaranteed RON is only a couple of points higher than PULP the specified "nominal" and maximum remain the same.


and depending on which blurb you read for what fuel has what the e85's "nominal" is higher than LPGs minimum.

Just as an aside...
I wasn't aware that LPG had an octane rating. I was led to believe that blends of LPG such as autogas were a propane/butane mix which varies in proportion depending on availability and seasonal mixes of its constituents. LPG has NO octane content like unleaded fuels.

But doing some googling shows propane has a RON of 112, n-Butane has a RON of 94, and that the RON rating of a fuel has nothing to do with the content of our favourite 8-carbon organic compound, but more to do with how the fuel compares to iso-octane as a reference fuel (which has a RON of 100).

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Originally Posted by Blknight.aus

Thats ethanol compatible. there are some vehicles that specify NO ethanol. the reason you are limited to E10 is not because it cant have the fuel physically in the lines or engine but due to other limiting factors as Toxic avanger has indicated.

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Agreed, but a local servo has a pump that it describes as V8Supercar fuel which is something around 110 octane, but will kill the pump/lines/injectors, which was sort of where I was going when I asked the stealer, cos the stuff is CHEAP. The general consensus from the service guys was to avoid E altogether. Personally, I think the thing runs better on 98, and uses less, but that's NOT cheap. It was worth it in the Golf we had, but not the Ford.

Never could work out why Ford didn't stick the 2.7 out of the Territory in the Falcon, but that's another issue.

at 110 RON it would be a minimum of 80% ethanol and ID expect 90+

the reason why the 98 fuel gives you the better running is it has a good density (Well no it doesnt it doesnt weigh in at anything like diesel but I'll keep it to petrol) compared to the higher ethanol blends and has a good enough RON to allow you to run more advance or higher compression.