I usually fill up with just regular unleaded and I get about 250 miles to the tank, usually from either costco or cheveron. I'm running 285/70r17's in yokohama geolandars, 2.5" level and bone stock other than that. I decided to see if mid grade would make any difference, I got almost 300 to this tank filling at cheveron. I'm wondering if premium would be worth it now. What do you guys thank and what do you usually run?
I always run premium because I run my Cortex on the Performance tune. I've tried a few times to run regular with the mileage save tune and there was a little change not sure if it was due to the programmer or fuel.
what he said. I'm by no means an expert on the subject. my under standing is you would want to use 91 octane with the 2* timing advance because of the faster burn rate of the higher octane fuel. Sound right?
I just always felt like premium is cleaner and better for the engine in the long run. And the airaid is definitely looking like its taking mpg down, will know for sure soon
I am obsessed with my MPGs. I hand calculate it every time I fill up cause I use it to gauge the health of the fuel system (filters, hoses, injectors, etc). I have noticed better MPG's with Chevron gas. Its only been 1MPG at best, but hey, anything helps right?
I only use 91 octane so my bully dog doesn't blow my motor on 91 tune. And I have 3° timing advance. Also I'm use to it my rx7 and 3000 gt took it so I'm use to paying a little bit more.
I only run 91 octane when I run my 91 Uprev Map at the drag strip. I haven't run the numbers but I doubt that running 91 octane on a daily basis makes economic sense. I get better MPG on 85 octane when running the appropriate Uprev map.
The Titan manual calls for 87 octane, which in most parts of the country is the lowest octane grade. Here in Colorado 85 is the lowest. I have no knocking.
Unfortunately, the way the vk and vq are designed with such big heads, you may never hear any knocking from cheap gas. The titan is made for 87 octane, because it has an average compression ratio of....9.6:1, I believe?
Anyway, if your gas wasn't adequate, the knock sensor would detect that and pull timing automatically.
Thats all I ran in my 2012 from day one with the 2 degree advance. I can see knock retard on the 2014 on 87 octane so I switched to 93 and gained some power.
Anyone run e85 map with flex fuel? i've heard of some GTRs and other stuff getting tuned for e-85, but not really a a titan.
maybe for a reason i guess haha
E85 is just about the same cost Mile per mile, however, E85 burns VERY clean.
Apparently, it burns so clean that one of my instructor's shops had a commercial account that had an engine blow. They ran only E85 in all their rigs and wanted to know what it looked like inside compared to a normal gasoline engine. My instructor said that, after around 200,000 miles on the engine, they took it all apart and it looked like a new engine on the inside, completely clean, no carbon buildup at all.
Long term, is it worth it? Maybe.
I'm not FlexFuel so I don't have to worry about it.