Make a donation

Author Topic: tuned for 91 octane and filling with 98ron fuel will that cause problems  (Read 1733 times)

Offline Adrenaline

  • Taking part
  • ***
  • Thank You
  • -Given: 1
  • -Receive: 1
  • Posts: 45
    • Email
Hey guys bought the car from us with a 91 octane tune and in my country we dont have 91 so will it cause problems if im filling with 98Ron

dansmith180

  • Guest
Re: tuned for 91 octane and filling with 98ron fuel will that cause problems
« Reply #1 on: September 13, 2014, 12:06:27 am »
Might not run as well as it would on 91 but ECU will adapt and will be fine, if you were tuned for 98 and put in 91 then you might feel a real difference but you should be fine

Offline GrayMK5GTI

  • Global Moderator
  • Just look at my post count
  • *
  • Thank You
  • -Given: 125
  • -Receive: 248
  • Posts: 4165
Re: tuned for 91 octane and filling with 98ron fuel will that cause problems
« Reply #2 on: September 13, 2014, 12:11:55 am »
Will probably run better!!  :happy2:

In the UK, our cars are mapped to run on basic 95RON. Most of us on the forum run 99RON and notice a huge improvement  :jumpmove:

The Bosch ECU will adapt for better fuels (or worse fuels).
NOW: 2015 Golf R DSG 5 Door, Lapiz Blue, 19s, Discover Nav, Reversing Camera
GONE:2007 Black GTI Edition 30 3dr

Offline rosco07

  • Always Involved
  • ****
  • Thank You
  • -Given: 1
  • -Receive: 2
  • Posts: 62
Re: tuned for 91 octane and filling with 98ron fuel will that cause problems
« Reply #3 on: September 13, 2014, 08:51:27 am »
91 US Octane = 95 RON

93 US Octane =98 RON

Is 95 RON available? 98 RON should do no harm as the ECU should adapt.

Offline Adrenaline

  • Taking part
  • ***
  • Thank You
  • -Given: 1
  • -Receive: 1
  • Posts: 45
    • Email
Re: tuned for 91 octane and filling with 98ron fuel will that cause problems
« Reply #4 on: September 13, 2014, 11:50:16 am »
We do have 95 Ron is it better to fill with 95?

Offline GrayMK5GTI

  • Global Moderator
  • Just look at my post count
  • *
  • Thank You
  • -Given: 125
  • -Receive: 248
  • Posts: 4165
Re: tuned for 91 octane and filling with 98ron fuel will that cause problems
« Reply #5 on: September 13, 2014, 12:13:55 pm »
Look in the fuel flap to see what the car is configured for.

Highest octane is best. End of  :happy2:
NOW: 2015 Golf R DSG 5 Door, Lapiz Blue, 19s, Discover Nav, Reversing Camera
GONE:2007 Black GTI Edition 30 3dr

Offline Scottymon

  • Just look at my post count
  • ******
  • Thank You
  • -Given: 83
  • -Receive: 125
  • Posts: 2139
  • UnNaturally Aspirated
  • My Ride: http://www.voodish.co.uk/misc/6n/6n-alive1.jpg
Re: tuned for 91 octane and filling with 98ron fuel will that cause problems
« Reply #6 on: September 13, 2014, 12:22:40 pm »
Use the highest octane for sure. :happy2:

Offline Adrenaline

  • Taking part
  • ***
  • Thank You
  • -Given: 1
  • -Receive: 1
  • Posts: 45
    • Email
Re: tuned for 91 octane and filling with 98ron fuel will that cause problems
« Reply #7 on: September 13, 2014, 12:48:28 pm »
Thanks guys will do for sure