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How many miles to a tank? Gen 4

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01 Mar 2020 19:04 #219256 by treps
I get around 500 kms a tank. And that is with standard 95 octane.
Is it worth running the Gen 4 on 98 octane? Much difference on mpg or performance?

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  • vecernik87
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03 Mar 2020 06:26 #219309 by vecernik87
Replied by vecernik87 on topic How many miles to a tank? Gen 4
@treps: Higher octane number does not mean better efficiency or performance. It just means it will not "kick" (i.e. ignite prematurely due to pressure and heat, before spark plug sparks). That happens typically in engines with high compression ratio. Unlikely to happen in Jimny...
(also, good to differentiate between different octane numbers: RON/MON/AKI...)

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  • Lambert
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  • The quickest Jimny in Harrogate...(that I own)
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03 Mar 2020 06:46 #219310 by Lambert
On the odd occasion of putting higher spec fuel in Dreadnaught there have been limited improvements in performance but not in the kind of way that the additional cost of the fuel could be justified or that the increase could be could be repeatedly quantified. It's not like the difference between running a jdm engine mapped for 100 octane on 95 vs 99.

Temeraire (2018 quasar grey automatic)
One of the last 200ish of the gen3s, probably.
ADOS Attention Deficit Ooooh Shiny!

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03 Mar 2020 16:51 #219331 by treps
Thanks. So what is the recommended fuel for the Gen4?
From the definition, am I right is concluding that putting 98 is a waste?

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  • petejones69
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05 Mar 2020 20:46 #219438 by petejones69
Replied by petejones69 on topic How many miles to a tank? Gen 4
I get around 200 miles from a tank full, standard petrol.

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05 Mar 2020 20:54 - 05 Mar 2020 20:56 #219440 by 300bhpton
290 miles on the trip tonight. Managed to squeeze in 35.02 litres.

Trouble is, you are driving completely blind. I accidentally reset the mpg trip at the last fill up and it hasn’t quite risen to the same number yet (still climbing). I also forgot to fill up last night and the fuel light came on this morning on the way to work. Sadly I don’t pass a Petrol station. Had to take a detour on the way home to find one. But as it turns out I could easily have made it home and then onto the local petrol station. If only the car was able to tell me how much fuel was actually left onboard :-(
Last edit: 05 Mar 2020 20:56 by 300bhpton.

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