Author Topic: JB4 and fuel types  (Read 605 times)

Offline sjw

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JB4 and fuel types
« on: 18 October 2019, 11:16 »
In the US, the JB4 recommends 91 octane for Map 1, and 93 octane for Map 2. Does that translate into 95RON for Map 1 and 99RON (Super unleaded) for Map 2?

Thanks, and sorry if this has been covered before

Edited - f'ed up the original post.
« Last Edit: 21 October 2019, 09:59 by sjw »

Offline barrym381

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Re: JB4 and fuel types
« Reply #1 on: 19 October 2019, 22:36 »
Run super unleaded using either map

Offline hog_hedge

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Re: JB4 and fuel types
« Reply #2 on: 20 October 2019, 08:08 »
93 USA translates to 98 RON UK so run either Tesco 99 or V Power for both. You should never run 95 on a tuned car.

Offline sjw

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Re: JB4 and fuel types
« Reply #3 on: 21 October 2019, 09:24 »
Ok thanks. Just realised I butchered the original post. It should have read 91 octane for map 1, and 93 for map 2.

What I was really trying to deduce was, is our 98/99 RON over here good enough for Map 2? And if I happen across a petrol station that doesn't have 99RON, and only has 95, would I be able to use map 1, or should I revert to stock?