Isle of man petrol

[furrywoolyhatuk]

Gents, its been suggested in a thread from GG part of the forum that you guys might be able to help. Taken from here:

http://www.pistonheads.com/gassing/topic.asp?h=0&a...


My car is mapped for 99 Ron fuel (jap import), when I went to to th IOM around 8 years ago (in the same car) they used to have a shell garage selling v power. All was well.

Now I'm off to the IOM again on Friday and have just discovered that shell have left the island and Manx petroleum has taken over.

For those that live on the island or have visited can you advise if there are any options for high octane fuel please.

Starting to panic!

[smithyithy]

IIRC, there was 97 at the Bray Hill station where I filled up this year, can't recall seeing any 99.

[TT Tim]

Get some octane boost if you're that worried.

the map should adapt for standard fuel anyway.

Tim

[furrywoolyhatuk]

Thank you gents.

Octane booster is a good shout. I'm sure the Ecu should be able to compensate to an extent.

[BuzzBravado]

TT Tim said:

the map should adapt for standard fuel anyway.

Tim

Not necessarily. JDM mappings are designed for fuel in the JDM market where 95RON is not used. 99 is as close as we can get to the 100+ they use in Japan.

[Mr OCD]

TT Tim said:

Get some octane boost if you're that worried.

the map should adapt for standard fuel anyway.

Tim

Not on older jap cars it will not ... more likely it will DET which is bad news.

[furrywoolyhatuk]

It's a 1997 skyline that was mapped in this country for 99 ron.

Iv bought some Lucas oil octane booster which alleges a 2-3 ron increase, my hope was by adding that to the 97 premium petrol that would do the trick.

Edited by furrywoolyhatuk on Wednesday 29th July 20:25

[bass gt3]

Do you not have the ability to dial down the boost when having to use lower octane fuel??
Seems a bit odd to map a car exclusively for a fuel which isn't available everywhere and not provide a secondary option or fallback.
If it's been mapped then that intimates there's a programmable ECU aboard which should be adjusting the timing and fuel maps or trims depending on measured manifold pressure? Lower the Manifold Pressure and you lessen the cylinder pressure which reduces knock/det....
and to be knocking on a -2 Ron point change in fuel seems to say the motor is mapped to a knife edge.....

[shunter V8]

Shell were never here,it always was manx petroleum that use shell fuel,and we have super unleaded as well as regular. If you got it before it is still here.