Jay93SE

Okay, this is really p*****g me off! I filled up my VE with 93 last week and noticed that i got a huge increase in mileage and it seemed like she had more bottom end. It also seemed to run a little rough, if you can figure that out! Fast forward to this week and they're asking for low grade what they were charging for the good stuff a week ago! Now she seems to run smoother, but I'm getting horrible gas mileage, about 150k less than I did on the good stuff. Anybody have the same problems or any idea's? Also, when I hit 110k or so the steering wheel really starts to shake, I hope it's only the tires needing to be balanced.

jaguax

iTrader: (1)

I've read on these forums that the ECU gets used to the type of fuel you use the most and when you all of a sudden switch to a different octane it takes the ECU some time to adjust.

However I switched from 89 to 93 a few times and noticed no difference in the idle really.

harrymay

i sweitched from ow grade to 89, and it feels as though ita got a rougher idle at the light, but it drive a lot nicer, and i also do have better mileage,

i also had a problem with a vibration at about 80mph, but the comp balance didnt pick up anything, so i bought new tires

internetautomar

iTrader: (30)

Did that help?

nubiannupe

iTrader: (9)

Hmmm... I've heard that too. But I kinda blew that off as But I went from 89 to 91 octane on my last fill-up, and my car seems to be 'hobbled' a bit. I'm hoping it's just coincidence and that my injector that I keep meaning to replace is acting up.