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getting better mpg
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Great theory, but in practice coasting in neutral uses less fuel.Driving down hill in neutral that is coasting is not good. First it reduces your control of the vehicle as you have no engine braking effect which in turn increases reliance on the wheel brakes which can cause them to overheat. Secondly the engine will revert to idle in neutral which requires it to burn fuel, when going down hill in gear the ECU detects this and virtually stops fuel supply, the effect may be small but it does increase mpg.
Maybe on a carburettor motor but it's one of the ways modern European compliant engines meet emissions.
Temeraire (2018 quasar grey automatic)
One of the last 200ish of the gen3s, probably.
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and going on N does not stops fuel injection? i didnt know about that, is there somewhere i can check this?
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- RumbleAndSway
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Never seen 40mpg but no grounds for complaint.
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I don't have any figures for 91 octane rating vs 95 we get in the UK, but would expect another increase in mpg, possibly as much as 5%. So that takes you up to about 36.5mpg.
The ECU needs to be able to adjust to the different octane ratings, but I assume they do this, or the ECU is 'tuned' for the market the vehicle is going in to.
Several years ago I hired a Jimny on holiday in the Caribbean, it seemed to drink fuel and it wasn't cheap, so I worked out the mpg, it wasn't very good, I put it down to the state of the roads. Only later did I realise that although the island used to be under British rule, pertrol was sold in US gallons.
I think you are not that far away. You might check the air filter or the CAT might have disintegrated, then again check the plugs and everything else, depending on how many miles your vehicle has done.
Robin
2011 Blue Jimny SZ3, Hankook Dynapro/Maxxis Worm-Drive, BB Classics BB6 Sports Seats, Radius Arm protectors, Android Head, DAB, 360 Camera, TPMS, K&N, Bosch Aerotwin, boot light, parcel shelf, boot box, dash box, Osram Nightbreakers, CTEK Battery Sense, Front & Rear Recovery points, CB Radio.
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Yes it does. You can see it on the instant consumption gauge on the Gen 4.so, does going on D shuts down fuel injection? where can i see that??
and going on N does not stops fuel injection? i didnt know about that, is there somewhere i can check this?
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It's all about friction and momentum, you go further in neutral than you will with your foot off the throttle, so it uses less fuel. I used to live in a hilly area, and it used to make quite a difference to my consumption - Gen 3 manual and Gen 4 Auto. Now I live in a very flat area, so I don't get the advantage any more.
Great theory, but in practice coasting in neutral uses less fuel.Driving down hill in neutral that is coasting is not good. First it reduces your control of the vehicle as you have no engine braking effect which in turn increases reliance on the wheel brakes which can cause them to overheat. Secondly the engine will revert to idle in neutral which requires it to burn fuel, when going down hill in gear the ECU detects this and virtually stops fuel supply, the effect may be small but it does increase mpg.
Maybe on a carburettor motor but it's one of the ways modern European compliant engines meet emissions.
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ATs, winch bumper and some other bits.im using a non traffic road, i drive 50 mph when going uphill and i go downhill in N, im not in the UK, what mods do you have?
Is your vehicle standard?
I assume if putting it in N it is a manual not an automatic.
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Curious, where are you?US gallon
91 octane, no ethanol
Do you know what Octane scale you use?
91 octane in the USA at least, would be about the same as 95RON here in the UK.
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Depends where in the world they are. Octane is rated in different ways.Can you use 91 in a series 4 my series 3 staits minimum 95 ?
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en.wikipedia.org/wiki/Octane_rating
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I'd suggest over 40mpg is not the norm for most Jimny's. You really do need to drive it very gently to attain that (never managed it in mine, even when 100% stock).My very standard gen 4 still achieving a lifetime average of over 42mpg (UK). No motorways near me but otherwise regular A & B road driving. I rarely cane it though.
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No, neutral will be at idle and still pumping fuel in. Using engine braking will be no fuel and potentially more economical.
Great theory, but in practice coasting in neutral uses less fuel.Driving down hill in neutral that is coasting is not good. First it reduces your control of the vehicle as you have no engine braking effect which in turn increases reliance on the wheel brakes which can cause them to overheat. Secondly the engine will revert to idle in neutral which requires it to burn fuel, when going down hill in gear the ECU detects this and virtually stops fuel supply, the effect may be small but it does increase mpg.
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