Dynojet: 294 whp/305 torque/24lbs boost with a custom BTR tune with full bolt-ons.
2012 Optima EX-T Spicy Red Showroom http://www.optimaforums.com/forum/49...-showroom.html w/ the following MODs: Wagner Intercooler|Injen SRI|845Motorsports Charge Pipe|Nameless Midpipe|Nameless Downpipe|Synapse V3 BOV|BTR Tune|Magnaflow Exhaust|Saikou Michi OCC's|Ultra Racing FSTB|Torque Solution Lower Engine Mount|kSport Coilovers|R1 Concepts rotors|and MORE...
87 is widely used for lots of engines now. I had a Chrysler 200 which used 89, that was weird to me. LOL
The Optima can use any grade of gas from 87 to 93, maybe even 100 octane racing fuel without any problems.
Having a mix of 87 and 91 would give you a octane number somewhere in the middle so your engine will still work fine.
Note: Even though a lot of people think that the car can run only on 87 octane gas; wrong, the owners manual says use at the minimum 87 octane, not at the most.
Last edited by carguy75; 06-30-2015 at 10:17 AM.
2014 Black KIA Optima SXL loaded w/
AEM dry performance drop-in air filter w/radiator cowl panel removed
Hella yellow HID look H7 high beam light bulbs
Running only Shell V-power 93 octane gas
5w-40 Total Quartz 9000 Energy synthetic oil
NGK ILKR8E6 spark plugs(1422)
Bosch Icon wiper blades- 24A, 18A
Black check-mark fog light trim
Michelin Primacy MXM4 225/45-18 tires
Hawk HPS 5.0 Front brake pads HB661B.667
Centric Posi Quiet Ceramic Rear brake pads 105.15440
Everyone's talking about 87 and 91 when the answer lies in the middle and beSt of both worlds 89. When you are given a trinity in a dualistic realm the answer is always balance.
I have a 14 LX but i've been running 93 Since December and to me the Engine feels more responsive and revs up a little smoother, then again, i don't have the 2.0 and it just might be me being stupid but i've seen a difference, so far haven't had problems running 93 at all.