Jump to content

e85 on a 93 octane tune?

uchi

Recommended Posts

uchi Enthusiast

uchi

Posted
Posted

ive got a trifecta tune in my truck, it runs great on 93 octane, i started to run some e85 in it as i found a station close to the boarder. im not sure how i feel about it. almost feels like ive lost a bit of power with the e85. if the truck is tuned to run best on 93, what are the chances the e85 is causing it to run worse? also the truck seems to just drink this stuff, i knew id get less range out of the tank but it seems to be going through it quite fast.

wurgs Senior Enthusiast

wurgs

Posted
Posted

E85 is notorious for getting about 25% less mileage but some have actually noticed more power. I can't use it in mine so no personal experience .

uchi Enthusiast

uchi

Posted
  • Author
Posted

never mind, just got an email back from my tuner, said that this tune will work even better with the e85 but it takes a bit of time for the truck to learn the new fuel in it system.

uchi Enthusiast

uchi

Posted
  • Author
Posted

im noticing its getting about 10-15 miles less per 1/4 tank. im gonna fill her up again this week and then on that tank figure out my gas mileage. the price of it is nice, 3.17 a gallon, 93 octane is 3.87 so thats a nice savings right there. right now high test in canada works out to be just a little over 5 bucks a gallon so getting the e85 for 3.17 is a welcome change

uchi Enthusiast

uchi

Posted
  • Author
Posted

ill know more after this tank is done, i know even switch from 87 to 91 octane took a tank or so before i felt its full effects and right now i still have some 93 floating around in the tank. the tune with the 93 is fantastic, id imagine once im on straight e85 itll be even better. the tuner said the tune is optimized for it so im looking forward to seeing the difference

uchi Enthusiast

uchi

Posted
  • Author
Posted

did a bunch of driving today. from the looks of things, based on the range ive driven and how little fuel i have left, im looking at getting about 100 miles less to a tank of e85 than a tank of 93 octane. yeah, the hell with that im going back to premium. i use the truck for work and drive a lot that extra hundred miles or more i can drive is a big difference and not worth the slight discount in price. i think it works out to be something like 18 bucks on a tank more for premium assuming i go till the light comes on, which i never do.

uchi Enthusiast

uchi

Posted
  • Author
Posted

so i did a couple pulls yesterday with the e85 fully worked into the system, and the truck seems to pull a good bit better even at half throttle than it did on just 93 octane. the power is nice but i cant deal with the fuel consumption and i dont think the cost of the e85 is worth the 100+ less miles i get to a tank

11Silvy Enthusiast

11Silvy

Posted
Posted

I figured it would be a tradeoff but not that much. That's a pretty big difference in mileage to say the least.

Archived

This topic is now archived and is closed to further replies.

Go to topic listing

  • Latest Articles

  • Posts

    • Chuck FB
      OCI, not when but why?

      By Chuck FB · Posted

      I certainly could be wrong but I hear of pickups far newer than that 2007 cutoff which may not be going to the wrecker but are having engine work done and be that a reman engine or new engine or trying to repair the existing engine. Some of it would be design issues as per the cylinder deactivation system that GM has and one of those lifters wiping out the cam and the question of oil changes moving the needle or not on that whole mess, or in the case of Ford pickup engines that have the long timing chains and wearing them out and the roller followers and phasers and some of that certainly goes back to oil change intervals. But in those various cases the truck has all sorts of life left in it and so the unfortunate owner and may be original owner or used market owner that is pouring money into repairs so the truck is not seeing the salvage yard yet but damage is happening by infrequent oil changes. A friends son had bought a 2018 I think it is half ton GM and it had some sort of extended or used dealer warranty on it and of course the lifter issue bites and its rattling and so the dealer had to swallow the bill and was at least 7000.00 and I think they only replaced what they felt they had to replace so yeah, I can see that being a ticking time bomb in the not too distant future. Would frequent oil changes cure all these engineering "marvels", probably not but some engine designs have shown that they do much better if the oil is changed a lot more often then if the manufacturer service claims are followed. New trucks cost so much that there is an incentive to keep the existing truck on the road by repairing. 
    • davester
      Tranmission stays in Low

      By davester · Posted

      get a good code reader, and find out what problems the truck has noticed by reading codes. cheap ones can only get basic engine codes, you may want to get one that can get codes from all the computers in your truck.
    • asilverblazer
      OCI, not when but why?

      By asilverblazer · Posted

      This is sort of my point, salvage yards aren't overflowing with all these 'poorly' maintained trucks - excellent/good/servicable condition otherwise, salvaged only as a result of a bad engine from poor oil change regiment.    In my area, there are no 2007 to newer gm trucks/suvs in any salvage yards. A few are in the 'recyclers' with very obvious reasons for being there - wrecked.
    • asilverblazer
      Stabilitrak conversion to Z71

      By asilverblazer · Posted

      Stabilitrack was a stability control, traction control system, that functioned independently from the transfer case.   Z-71 has nothing to do with the transfer case or differential.   If it does have an AWD system, my memory recalls this being specific to the Denali trim, converting won't be as simple as swapping out mechanical parts like differentials and transfer cases. It will require reprogramming at a minimum. Long story short, not likely worth it.   Pulling a fuse, may disable the AWD system, it might also prevent any other transfer case functions.   However, the AWD case was generally based on the same transfer case you refer to in the 2006 Suburban. If it still has a 4-High and 4-Low where the transfer case locks and splits power 50-50 front to rear, what are you gaining by changing anything? A true-rear wheel drive only, what good will that serve? Not enough to go through the trouble of changing out all the parts.    Generally, all the factory systems will handle a 33" tire and re-gearing. Probably a 35" tire too, if you aren't driving like a caveman. If 35" tires are in the plan...   If you do plan on driving like a caveman or are fully committed to 35" tires, an entire re-think of the build is probably in order. Starting with square one, an IFS front end isn't going to be the best starting point for 35's and caveman driving. 
    • PunchT37
      Oil Consumption

      By PunchT37 · Posted

      1/2 qt over full ain`t gonna hurt $h!t. Most times, a whole qt won`t either. Most have windage trays now. As long as the crank isn`t slapping itself in the oil, it`s not the end of the world.   We used to overfill 1 qt at the track, at race time. Better to have it over full than having the pan sucked dry at 6500 rpm`s.

  • GM-Trucks.com Clubs

  • Popular Contributors

×
×
  • Create New...