Local airport has 100 octane gas, would it be harmful to run? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

VesperLynn · 05-16-2013, 05:49 PM

So, as the title suggests, the local airport has 100 octane Low Lead aviation fuel for about 4.80 a gallon. I'm curious if it would be harmful to run in this engine. I've run the gas before in my dirtbikes with no ill effects whatsoever, but I'm assuming with three extra cylinders it would be a different story.

The engines used in all the Cessna's are all horizontally opposed 4 cylinder engines, so they are somewhat a close cousin to the engines in these cars. I know it says unleaded fuel only but I've never quite understood why and if it would be harmful to run a low lead gasoline in the car. Any help would be appreciated, and if this thread needs to be moved please do so mods.

UncleFester · 05-16-2013, 06:03 PM

Why would you want to?

Sbeezy · 05-16-2013, 06:04 PM

you'd have to remove the cats to run leaded fuel!

Myv · 05-16-2013, 06:04 PM

Quote:

Originally Posted by UncleFester

Why would you want to?

Because racecar

(Sorry, had to

)

Sbeezy · 05-16-2013, 06:08 PM

http://www.ehow.com/facts_7826145_le...onverters.html

SkullWorks · 05-16-2013, 06:12 PM

Lead contaminates and reduces the effectiveness of the catalytic converters, it also coats the O2 sensor rendering it useless in a much shorter time period.

Long story short, long term drawback probably not worth short term gains

chrisl · 05-16-2013, 06:24 PM

Most Cessnas run horizontally opposed engines, yes. However, they run carbureted, low compression (~7:1), air-cooled horizontally opposed six cylinder engines that have a design dating back to about the 1940s. Your engine has very little commonality with the aviation engines aside from which directions the pistons travel.

Oh, and definitely don't run leaded gas. You can find race gas some places if you really have a hankering to run high octane. You won't gain anything from it though unless you have made other modifications as well.

VesperLynn · 05-16-2013, 06:40 PM

I think I should state again that I'm not necessarily saying that I'm going to start pouring the blue stuff into my tank, I was just simply curious. Just trying to understand all the mechanics better!

bcj · 05-16-2013, 06:49 PM

Higher octane won't improve anything over what the engine is designed to run on.
A higher compression ratio may warrant it, but the lead is not a good idea.

Wasn't speeding officer, only flying really low.

Freude am Fahren · 05-16-2013, 08:44 PM

No, don't use it. Check with your local Sonocos as they are somewhat likely to carry race gas. However, I think you wont notice much other than the nice smell.

bestwheelbase · 05-16-2013, 09:08 PM

Here's the VP race fuel distro for Oregon. http://repowell.net/vp-racing-fuel.html

Allch Chcar · 05-16-2013, 09:52 PM

Quote:

Originally Posted by VesperLynn

... I know it says unleaded fuel only but I've never quite understood why and if it would be harmful to run a low lead gasoline in the car. Any help would be appreciated, and if this thread needs to be moved please do so mods.

Lead will damage the catalytic converters($$$$). It's part of the reason lead was banned from Gasoline in the 70's.

Either look for unleaded race gasoline or E85. Don't forget the ECU tune.

Liquidsnake · 05-16-2013, 10:02 PM

Quote:

Originally Posted by Myv

Because racecar

(Sorry, had to

)

Lol.

ianz28 · 05-16-2013, 10:15 PM

If you are in Portland there is a gas station off of MLK up by PIR that sells pure 93 octane (no ethanol) and 107 octane sonoco race fuels.

05-16-2013, 05:49 PM	#1
VesperLynn Senior Member Join Date: Oct 2012 Drives: Subaru BRZ Location: Oregon Posts: 424 Thanks: 468 Thanked 338 Times in 136 Posts Mentioned: 63 Post(s) Tagged: 0 Thread(s)	Local airport has 100 octane gas, would it be harmful to run? So, as the title suggests, the local airport has 100 octane Low Lead aviation fuel for about 4.80 a gallon. I'm curious if it would be harmful to run in this engine. I've run the gas before in my dirtbikes with no ill effects whatsoever, but I'm assuming with three extra cylinders it would be a different story. The engines used in all the Cessna's are all horizontally opposed 4 cylinder engines, so they are somewhat a close cousin to the engines in these cars. I know it says unleaded fuel only but I've never quite understood why and if it would be harmful to run a low lead gasoline in the car. Any help would be appreciated, and if this thread needs to be moved please do so mods.

05-16-2013, 08:44 PM	#10
Freude am Fahren Senior Member Join Date: Jan 2013 Drives: '13 DGM BRZ Limited/'14 Yamaha R6 Location: SoFlo Posts: 333 Thanks: 46 Thanked 96 Times in 64 Posts Mentioned: 2 Post(s) Tagged: 2 Thread(s)	No, don't use it. Check with your local Sonocos as they are somewhat likely to carry race gas. However, I think you wont notice much other than the nice smell. __________________ -XXR 527 18x8.75 +35 -Nameless 2.5" OP/FP Combo (Coming soon) & Axleback -SBD 500X (Waiting on coating to install) -Southbend SBD500X Clutch

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05-16-2013, 06:03 PM	#2
UncleFester Senior Member Join Date: Jun 2012 Drives: BRZ Location: Northern Virginia Posts: 597 Thanks: 157 Thanked 178 Times in 120 Posts Mentioned: 15 Post(s) Tagged: 0 Thread(s)	Why would you want to?

05-16-2013, 06:04 PM	#3
Sbeezy Senior Member Join Date: Apr 2013 Drives: 2001 ZX2, WRBP BRZ (soon hopefully) Location: Port Arthur Tx Posts: 182 Thanks: 111 Thanked 23 Times in 23 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	you'd have to remove the cats to run leaded fuel!

05-16-2013, 06:08 PM	#5
Sbeezy Senior Member Join Date: Apr 2013 Drives: 2001 ZX2, WRBP BRZ (soon hopefully) Location: Port Arthur Tx Posts: 182 Thanks: 111 Thanked 23 Times in 23 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	http://www.ehow.com/facts_7826145_le...onverters.html

05-16-2013, 06:12 PM	#6
SkullWorks Banned Join Date: Mar 2012 Drives: SSM LT MT BRZ Location: SoCal Posts: 1,033 Thanks: 803 Thanked 754 Times in 328 Posts Mentioned: 23 Post(s) Tagged: 1 Thread(s)	Lead contaminates and reduces the effectiveness of the catalytic converters, it also coats the O2 sensor rendering it useless in a much shorter time period. Long story short, long term drawback probably not worth short term gains

05-16-2013, 06:24 PM	#7
chrisl Senior Member Join Date: May 2013 Drives: 2006 Cayman S, 2007 Outback 2.5i Location: Colorado Posts: 1,116 Thanks: 116 Thanked 455 Times in 303 Posts Mentioned: 8 Post(s) Tagged: 0 Thread(s)	Most Cessnas run horizontally opposed engines, yes. However, they run carbureted, low compression (~7:1), air-cooled horizontally opposed six cylinder engines that have a design dating back to about the 1940s. Your engine has very little commonality with the aviation engines aside from which directions the pistons travel. Oh, and definitely don't run leaded gas. You can find race gas some places if you really have a hankering to run high octane. You won't gain anything from it though unless you have made other modifications as well.

05-16-2013, 06:40 PM	#8
VesperLynn Senior Member Join Date: Oct 2012 Drives: Subaru BRZ Location: Oregon Posts: 424 Thanks: 468 Thanked 338 Times in 136 Posts Mentioned: 63 Post(s) Tagged: 0 Thread(s)	I think I should state again that I'm not necessarily saying that I'm going to start pouring the blue stuff into my tank, I was just simply curious. Just trying to understand all the mechanics better!

05-16-2013, 09:08 PM	#11
bestwheelbase Join Date: Nov 2011 Drives: 1985 P-Type Location: Nashville, TN, USA Posts: 3,710 Thanks: 3,273 Thanked 2,058 Times in 1,098 Posts Mentioned: 50 Post(s) Tagged: 1 Thread(s)	Here's the VP race fuel distro for Oregon. http://repowell.net/vp-racing-fuel.html

05-16-2013, 10:15 PM	#14
ianz28 Member Join Date: Jan 2012 Drives: 09' VW GTI Location: portland Posts: 26 Thanks: 1 Thanked 15 Times in 4 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	If you are in Portland there is a gas station off of MLK up by PIR that sells pure 93 octane (no ethanol) and 107 octane sonoco race fuels.

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