View Poll Results: OCTANE - Which gas do you put in your 3IS
I always use 91 or higher.
259
91.20%
I sometimes use 89 or 87.
3
1.06%
I always use 89.
6
2.11%
I always use 87.
16
5.63%
Voters: 284. You may not vote on this poll
OCTANE - Which gas do you put in your 3IS and why?(merged threads)
11-23-18, 12:04 AM
#151
Driver School Candidate
89 Octane
Went to put gas in for the first time and mistakenly put 89 Octane in my 2016 IS3. What should I do? The label on the gas cap said 93. I didn't pay attention until the pump was almost finished. Every car that I have previously owned used regular.
The following users liked this post:
MsDesiJo (11-26-18)
The following users liked this post:
MsDesiJo (11-26-18)
11-24-18, 06:40 AM
#157
91 is recommended, but not required. The engine is fully capable of running safely on 87, even at full tilt, the ECU will just pull timing. In fact, if you're not driving the car hard you'd never know the difference.
Some ECU's will, in the absence of high octane gas, pull timing for quite a while, and possibly require a reset. Not sure if your engine is this way, but even if it were, it wouldn't be an issue with one tank of gas.
Some ECU's will, in the absence of regularly driving the car aggressively, pull timing just for better gas mileage, so if you drive like a grandpa you could run 87 octane forever and not even know the difference. Not sure if your ECU does this either. Maybe one of the tuners could chime in here.
It comes down to using the type of gas based on how you drive the car.
Some ECU's will, in the absence of high octane gas, pull timing for quite a while, and possibly require a reset. Not sure if your engine is this way, but even if it were, it wouldn't be an issue with one tank of gas.
Some ECU's will, in the absence of regularly driving the car aggressively, pull timing just for better gas mileage, so if you drive like a grandpa you could run 87 octane forever and not even know the difference. Not sure if your ECU does this either. Maybe one of the tuners could chime in here.
It comes down to using the type of gas based on how you drive the car.
11-24-18, 07:03 AM
#158
91 is recommended, but not required. The engine is fully capable of running safely on 87, even at full tilt, the ECU will just pull timing. In fact, if you're not driving the car hard you'd never know the difference.
Some ECU's will, in the absence of high octane gas, pull timing for quite a while, and possibly require a reset. Not sure if your engine is this way, but even if it were, it wouldn't be an issue with one tank of gas.
Some ECU's will, in the absence of regularly driving the car aggressively, pull timing just for better gas mileage, so if you drive like a grandpa you could run 87 octane forever and not even know the difference. Not sure if your ECU does this either. Maybe one of the tuners could chime in here.
It comes down to using the type of gas based on how you drive the car.
Some ECU's will, in the absence of high octane gas, pull timing for quite a while, and possibly require a reset. Not sure if your engine is this way, but even if it were, it wouldn't be an issue with one tank of gas.
Some ECU's will, in the absence of regularly driving the car aggressively, pull timing just for better gas mileage, so if you drive like a grandpa you could run 87 octane forever and not even know the difference. Not sure if your ECU does this either. Maybe one of the tuners could chime in here.
It comes down to using the type of gas based on how you drive the car.
11-24-18, 07:14 AM
#159
Driver School Candidate
91 is recommended, but not required. The engine is fully capable of running safely on 87, even at full tilt, the ECU will just pull timing. In fact, if you're not driving the car hard you'd never know the difference.
Some ECU's will, in the absence of high octane gas, pull timing for quite a while, and possibly require a reset. Not sure if your engine is this way, but even if it were, it wouldn't be an issue with one tank of gas.
Some ECU's will, in the absence of regularly driving the car aggressively, pull timing just for better gas mileage, so if you drive like a grandpa you could run 87 octane forever and not even know the difference. Not sure if your ECU does this either. Maybe one of the tuners could chime in here.
It comes down to using the type of gas based on how you drive the car.
Some ECU's will, in the absence of high octane gas, pull timing for quite a while, and possibly require a reset. Not sure if your engine is this way, but even if it were, it wouldn't be an issue with one tank of gas.
Some ECU's will, in the absence of regularly driving the car aggressively, pull timing just for better gas mileage, so if you drive like a grandpa you could run 87 octane forever and not even know the difference. Not sure if your ECU does this either. Maybe one of the tuners could chime in here.
It comes down to using the type of gas based on how you drive the car.
11-24-18, 07:15 AM
#160
Again, it depends on how you use the car. I'm certain there are a lot of IS owners out there that just wanted a sporty look to their luxury car, and never drive the car hard. The guys you see commenting on this forum are only a few percent of the IS drivers out there. As to why the manufacturer suggests 91 octane, that's simply a gas mileage thing. The higher the octane, the slower the burn, and consequently the more efficient the car runs, giving you the best gas mileage possible on a TERRIBLE gas mileage car...even when driven normally.
11-24-18, 07:19 AM
#161
Driver School Candidate
Just got the IS about 2 weeks ago, haven't even made the first payment yet.
11-24-18, 07:22 AM
#162
That tank of gas isn't going to bother anything, no worries. But if you want the best performance out of the car, the highest normal octane (93/94) you can get is the best. DO NOT use octane booster.
11-24-18, 07:26 AM
#163
Driver School Candidate