E350 Octane?
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Joined: Mar 2014
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From: West Central Florida
2011 E550 P2 4M Sedan
In Tampa Bay area, I just paid $2.259/g for 93 (87 was $1.929/g) today. On way through South Carolina a week ago I paid $2.119/g which was less than the price of 87 at some stations in Georgia and Florida. Gotta those low SC taxes. However, in FL there is no ad valorem tax on personal vehicles. I pay a basic registration fee of about $90 to the country per year irregardless of the value of the car. Property taxes are another story.
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From: Sidney, BC
2009 SLK55 AMG. & 2022 GLA250 4Matic
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E350
Octane is rated in RON (Research Octane Number) and MON (Motor Octane Number) and in America you take the Ron and Mon and add them together then divide it by two. Europe has 98 Ron which after the Mon is added to that and then divided by two then it comes out to be 93 like we have here. Which is sometime called AKI (Anti Knock Index) or PON (Posted Octane Number). So our 87, 89, 91, and 93 are AKI or PON numbers. Hope that helps.
Last edited by jklatt16; Jul 1, 2015 at 06:07 AM.
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E350
AvGas is 100LL meaning 100 MON octane with low lead. The only thing it will hurt is the catalytic converters (degrades platinum) and the O2 sensors (lead coating on sensor putting out wrong data) and possibly lead fouling of the spark plugs, but that would take probably years of lead buildup with 100LL, yet if you have a built car without cats and O2 Simulators or you can even get wideband O2s that leaded fuel will not hurt. So I wouldn't quite say "serious issues" but it could over time degrade those parts if stock. Over at Innovate they say the Bosch sensor that the Innovate uses can withstand leaded fuel and the box even says it can uses unleaded, leaded, diesel, alcohol, etc.
Last edited by jklatt16; Jul 2, 2015 at 04:04 AM.
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From: California
w212 E350 Bluetec & Mk7 GTI Sport
anything lower than 91 w i l l destroy your catalytic converters and the engine delimits power based on the level of gas put inside. 100 octane will not damage the car but running it on full tanks of oly 100 octane isnt advisable... My cars old owner has been using 87 and it caused them to fail, fixed under warranty.
Newbie
Joined: Jul 2015
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E350
anything lower than 91 w i l l destroy your catalytic converters and the engine delimits power based on the level of gas put inside. 100 octane will not damage the car but running it on full tanks of oly 100 octane isnt advisable... My cars old owner has been using 87 and it caused them to fail, fixed under warranty.
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Joined: May 2009
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From: Stamford, CT
2012 E350 RWD, 2003 Aprilia RSV1000 Tuono
Ys it will delimit power but it will not destroy the cats. Only leaded gas will destroy them because it degrades the platinum in it. My neigbor has a 2008 and he has run 87-89 in there since he bought it and it still runs perfect, cats are still in there and it has 87,000 miles. The octane level will not have any effect on the cats. Maybe that's what your service guy (parts changer) told you but that's not right.
Agree.
