Ok, so ive been reading just about everything i can on e85 and still inconclusive. Simple question,.......Can I run e85 on my stock fuel tank and fuel lines? My car is a 91 civic si. the motor is a K. fuel pump WILL be a 255lph, injectors are 750cc. Just want to make sure I can run e85 through my stock fuel system. let me know, thanks.

 

E85 is very corrosive it will over time corrode your fuel tank and fuel lines
for more info on E85 google White Lighting they have good info on E85 kits

 

your car can already use up to E15 as indicated by the Owner's manual, however I don't know if it can safely use E85. Part of the problem with E85 is not that it's corrosive (these cars can already handle E15 which is a problem in of itself), the problem is the A/F ratio is not correct for your vehicle and it MAY (not necessarily) run properly, and henceforth run rich. I'm very tempted to just buy a junk honda civic and test out once and for all whether or not E85 will damage anything or not.

 

Read this
https://honda-tech.com/forums/forced-induction-16/effects-e85-parts-test-2766595/

 

Im going to get it tuned. Let me know if you do your test on a junk civic.


Thanks bro, very informative, still a bit inconclusive, but its enough for me to at least try it out.

 

one bit of warning is that E85 is mostly alcohol and if you have carbon deposits inside of your engine, this may cause them to get dislodged which could cause engine failure. Might or might not be a good idea for a rough running engine, depending on what the problem is and how the carbon is helping/hurting the engine.

 

You guys are smoking rocks i know at least ten people using e85 with a stock fuel system been using it for years we have had it in colorado for a long time

 

well their cars are probably in good shape and it's good to hear that but warning of dislodging carbon isn't totally unreasonable when you think about how cars that run on E85 are much cleaner internally than cars that run on gasoline.

 

im not worried about the motor, because its only got 500 miles, maybe, on a fresh build. Im mainly concerned about my fuel tank and fuel line.

 

My POS daily slurps the ethanol blend with no worries. Fuel consumption is a bit more, and even wtih correctly set ignition timing it stumbles off the lines (automatic) with the lower octane rating. Small price to pay for the saving you get at the pump.

 

lower octane rating? E85 has a MUCH higher octane rating than even Premium gasoline..

 

you will see a decrease in fuel economy running E85.

 

^yep

imo the decrease in fuel economy negates the savings per gallon

 

Yea, but its still cheaper than getting racing gas all the time.

 

You're right, i'd meant to say higher ethanol blend.