V35 Fuel Economy

[chopra]

Hi Guys ,

My V35 coupe is giving me 500ks on 58 litres of fuel , comes to 8.6ks\litre.

These are mostly freeway ks.

IS THIS NORMAL?

If it isint can you suggest what should i do to make this better?

Change spark plugs etc????????

Thxx

[grae35]

Sounds pretty normal to me. I do much the same balance of driving and get similar figures.

Won't hurt to check your two rear plugs as these seem to be the most affected by km's. Also see if you have any oil in the plug tubes around the insulators.

They have a habit of leaking around the rocker cover gasket.

Check your air cleaner element too. Easy to see with a torch through the power duct at front above radiator with bonnet popped.

[rondofj]

What ur talking about, my R34 is giving me 280kms on 55litres which comes to roughly 19.6 litres/100kms which is driving me nuts! Is this the most horrible fuel economy on SAU?? This was the last fill-up. Before that it came to about 16L/100kms, these were mostly highway kms.

Stock turbo, short distance stop-start driving with the occassional few second squirt to 5-7k rpm. And this is even after my tune more than a year ago; before the tune, the economy was more or less the same, I thought the tune would fix it but it didnt, but power and driveablility is a LOT better though.

Edited June 6, 2012 by rondofj

[sonicii]

I get around 11.5L/100km in my 6MT, all city driving (not peak hour), and the occasional heavy right foot. Which is about the same as the OP is getting with a lot of highway driving.. so I would say it sounds a bit high..

I haven't taken it on a highway run yet.

[GED59]

I was getting 8.6km/l before Z tube 9.4km/l after, 2003 A/T . Dont know why Nissan use km/l instead of L/100km

[sonicii]

^^ I guess you must have fixed a leak or something when you installed you Z tube, because there is no way it alone can impact your fuel economy.

[Nightcrawler]

I normally get around 13l/100km but that includes a lot of sitting around idling with the a/c on for my work. But when I did a decent highway trip from Adelaide to Shepparton last year for the SAU Nationals I got 8.8L/100km!!! And I have all sorts of mods and am making 183rwkw.

[rayh1]

2001 V35 300Gt

I get between 11.5.and 13 kms per litre on the highways

One thing I have found is that putting it into 5th gear using tiptronic gives better economy on the highway

Now i drive highways mostly in that gear not using the D setting on the auto, only going into D when overtaking

[Vimana]

Hmmm. D in auto uses 5th above 50kmph all the time unless accelerating.

[interfooler]

I normally get around 13l/100km but that includes a lot of sitting around idling with the a/c on for my work. But when I did a decent highway trip from Adelaide to Shepparton last year for the SAU Nationals I got 8.8L/100km!!! And I have all sorts of mods and am making 183rwkw.

Roughly the same as what I'm getting. 12l/100km city driving, 8.5l/100km freeway. Pretty damn good for a performance car I'd say.

I was getting 8.6km/l before Z tube 9.4km/l after, 2003 A/T . Dont know why Nissan use km/l instead of L/100km

Cuz it's an import and it uses the Japanese format. AUDM Nissan's all use L/100km

OP, I think your fuel consumption is slightly high...

[chopra]

Thx for the replies guys,

sounds like my fuel economy on the freeway is preety high,

so looks like i have to check my spark plugs and might have to get a tune for a better economy.

Anyone know a good place in adelaide to get the tune done?

and any other suggestions to improve this economy

[Nightcrawler]

The other big driver of economy is your O2 sensors - when I changed mine in my old 230rwkw R34 it made a huge difference. But sadly the V35 has 4 of the buggers, and they are not cheap.

[Marshan]

Damn i'm doing around 460km on 65L with a mixture of highway and city driving. Idle during traffic really kills it i guess.

[Damian-V35]

I'm getting 550-600km a tank doing about 400km highway and the rest city driving.

It's a bit high for my liking, but I love the V.

My 6.0lt SS used to get about the same.

[itpesaf]

I'm averaging ~11.5-12L/100kms normal city driving.

[Deep Dish V35]

i have 2 different answers to this topic

250gt with basic mods and 285/25/20 rear tyres

13.5L per 100km (calculated from odometer vs refill amount).

the tv says i do 11.9L per 100km.

Dont know which reading is correct.

[sonicii]

I would think the odometer method would be more accurate, provided you use most of the tank between fills. If you are only using 1/4 of a tank then refilling, then the different 'full cut out' points on each bowser can throw out the figure. Maybe check your odometer with a GPS or something (one that can do distance calculations).

[Vimana]

The screen is an average since you last reset the screen. not just 1 tank

[rayh1]

Hmmm. D in auto uses 5th above 50kmph all the time unless accelerating.

I thought so too, however try going from D to tiptronic at any time on open road, more often than not it translates across into 4th gear

and there is usually a corresponding drop in revs too from D into 5th. Simple fact is that it gives me on average about 2kms/per litre improvement

[rayh1]

i have 2 different answers to this topic

250gt with basic mods and 285/25/20 rear tyres

13.5L per 100km (calculated from odometer vs refill amount).

the tv says i do 11.9L per 100km.

Dont know which reading is correct.

Have you had your speedo recalibrated, the larger tyres may have thrown your speedo reading out