Hey boys and girls!
Here is my little story:
About 5 weeks ago i started to use 91 octane instead of 87 since the car is breaking 90k miles. in week 1 of filling her up, the car was idleing a little funny, but i thought nothing of it.
Week 2 i filled her up with 91 again and the idling improved.
In week 3, i filled the tank with 91 octane like i planned. about half way into the 3rd week i noticed that the engine was sounding a little unusual. The tone of the engine at 3k rpm was sounding deeper and more agressive. (of course no performance increase) I told my friend to listen to the engine tone (without telling him what to look for) and he told me "the engine sounded more throaty".
I switched back to 87 octane last week (4th week) and the sound went away.
NOW i added 91 octane this week (week 5) and the car is acting a little weird at idle again. It's like the engine is getting used to the octane.
Anyone else ever experience this? I just thought it was a little funny.
Here is my little story:
About 5 weeks ago i started to use 91 octane instead of 87 since the car is breaking 90k miles. in week 1 of filling her up, the car was idleing a little funny, but i thought nothing of it.
Week 2 i filled her up with 91 again and the idling improved.
In week 3, i filled the tank with 91 octane like i planned. about half way into the 3rd week i noticed that the engine was sounding a little unusual. The tone of the engine at 3k rpm was sounding deeper and more agressive. (of course no performance increase) I told my friend to listen to the engine tone (without telling him what to look for) and he told me "the engine sounded more throaty".
I switched back to 87 octane last week (4th week) and the sound went away.
NOW i added 91 octane this week (week 5) and the car is acting a little weird at idle again. It's like the engine is getting used to the octane.
Anyone else ever experience this? I just thought it was a little funny.