Stagea Fuel Economy

[iamhe77]

I try not to comment for fear of sounding like a douche! so be kind!

I drive an 03 M35. My leaf thingy tells me I'm getting 7.5 km / litre which I think equates to 600 km out of my 80L tank (or 13.3L/100km) . However in reality I am consistently getting only 450 km's out of a tank which is more like 5.7 km / litre or 17.5L/100km.

I use my car for work and do 80 -100 km a day so it is adding up quickly. In reading this thread it seams like there is a massive difference in the economy that the relatively un-modded M35's are achieving. Besides checking my tank for holes can anyone offer any insight into the discrepancy between my trip computer and actual L/100km, and can anyone make any suggestions on modifications to improve my economy aside from the weight of my right foot?

Any help appreciated.

600kms... but how much fuel did you put in? I can only assume that you didn't run it dry then put all 80L back in.

If you are going by the fuel light, there is still around 15L or so in your tank from when the light comes on.

Fwiw, I was averaging 9.3km/L before my Stagea was modified whereas I am currently averaging 10km/L with a number of mods (travel is effectively the same).

7.5km/L sounds about right if you do the vast majority of your driving around town... or so I am told.

A lot of it also comes down to knowing what your car will do in response to tiny/normal/large movements of your right foot.

[Daleo]

Roughly 1000km in the last couple of days, up to Ballina, some running around & a trip to Brunswick Heads; 9.5L/100km.

Pretty happy with that, not exactly a girlyman economy run, so not too shabby I reckon.

[Commsman]

Roughly 1000km in the last couple of days, up to Ballina, some running around & a trip to Brunswick Heads; 9.5L/100km.

Pretty happy with that, not exactly a girlyman economy run, so not too shabby I reckon.

Not too shabby on the economy at all Dale. Pity those swaybars weren't ready. You could have dropped them in to me on your way past since I live between Ballina & Bruns .

Do you come up this way often?

[Daleo]

Not too shabby on the economy at all Dale. Pity those swaybars weren't ready. You could have dropped them in to me on your way past since I live between Ballina & Bruns .

Do you come up this way often?

Yeah, it looks like it's dropped to around 9.2 for the entire trip.

I know mate, I'm not even sure if they're in the country yet! I'll find out tomorrow, when I throw great wads of cash at my supplier! How funny is that; spent the arvo at Hotel Bruns yesterday, several beverages were imbibed...

Unfortunately not, it's a nice spot. My missus best mates wedding, so we decided to make a weekend of it.

[Commsman]

Yeah, Bruns Hotel is a nice spot. I've had the odd lager there myself. Well if you ever come back I'll have a couple more . 9.2 for the trip, nice! I can get good figures, but I'm yet to achieve that low. Gives me something to aim for.

[jidge]

I received an email campaign about petrol prices.

To cut the story short here is the idea: For the rest of this year, DON'T purchase ANY petrol from BP, the biggest price-up driver company.

If they are not selling any petrol, they will be inclined to reduce their prices. If they reduce their prices, the other companies will have to follow suit.

Going back to the topic I get around 13L per 100km (got the dump and front pipe done but did not see any improvement in fuel economy.... If you are just doing the dump pipe looking for better fuel efficiency I would not recommend the move)

Sorry for the message but I guess it's worth trying it.... I'll be doing my share....

So I guess there are mixed results..... A few have seen improved economy after installing dump pipe.

[jidge]

I use the 100RON, seems ok, not sure if the economy is worsened though, ethanol is supposed to have worse fuel consumption.

If only we had e85 easily accessible here...

The 100 RON I am running at the moment seems to have improved power over standard premium 95. It contains ethanol (10% I think).

I will find out economy at end of tank.

[Commsman]

The 100 RON I am running at the moment seems to have improved power over standard premium 95. It contains ethanol (10% I think).

I will find out economy at end of tank.

So you've run yours on 95? I've never been game, only ever used 98. I wish there was 100 (or higher) around here to try but no such luck. What's 95 like in your car & is it standard or modified?

[FHF]

true... I am actually in a new job and the travelling to and from work is totally different... I have to take that in consideration... gotta hit a HWY to see if there is any difference....

point is I was taking this mod as one of my first considering the benefit of better fuel economy.... in theory it should improve but I have't noticed it yet....

So I guess there are mixed results..... A few have seen improved economy after installing dump pipe.

[Jetwreck]

So I guess there are mixed results..... A few have seen improved economy after installing dump pipe.

I guess it comes down to how your dump flow's!......a good one makes a difference! I noticed an improvement straight away and that was before my tune!

[ironpaw]

The 100 RON I am running at the moment seems to have improved power over standard premium 95. It contains ethanol (10% I think).

I will find out economy at end of tank.

Pretty sure your economy will be no better, if not worse. Its a known fact that E10 has worse economy then 98 PULP.

As for the extra power...doubt it. Our ECU doesn't advance timing on its own....

[iamhe77]

Pretty sure your economy will be no better, if not worse. Its a known fact that E10 has worse economy then 98 PULP.

As for the extra power...doubt it. Our ECU doesn't advance timing on its own....

But it will retard timing based on fuel... so since he was using 95, he may well find an increase in power as the ECU returns the timing to normal (98).

I used 95 when I was in the middle of nowhere... once. Definite drop in power until it was out of the system.

[NYL83R]

Last time I tested my fuel economy I got approx 10L/100km (driving on the freeway) with Shell V Power

it wasn't a big test though, as I simply filled the tank full in Newcastle, then filled up again in Sydney after doing approx 150km it used just under 15L. Driving to Grafton soon, so I'm going to test it again. I guessing the economy will go down as I'll be driving through town, making stops etc...

tests based on a Stock Series 2 1999 C34

[jidge]

So you've run yours on 95? I've never been game, only ever used 98. I wish there was 100 (or higher) around here to try but no such luck. What's 95 like in your car & is it standard or modified?

Yeah I haven't had the car long and couldn't get 98 the first time I filled up.

95 seemed OK though, but may be why I saw less than impressive economy figures?

I will def. go the 100 or 98 in future, try out a few to see what is best.

[bigkevracer]

But it will retard timing based on fuel... so since he was using 95, he may well find an increase in power as the ECU returns the timing to normal (98).

I used 95 when I was in the middle of nowhere... once. Definite drop in power until it was out of the system.

I used 98 when I first got the car and had no issues with it. Pretty decent economy, but that was all highways. I've found no serious difference in economy between the 100 E10 and the 98 when doing highway driving, and haven't had a tank of 98 round town for comparison.

I don't know if the 100 makes any difference, but it feels like it. Alfalfa was bitching at the last SA cruise about my car having a lot more go than his AXIS, so maybe there's something to it. Don't care if it is the placebo effect!

[jidge]

I used 98 when I first got the car and had no issues with it. Pretty decent economy, but that was all highways. I've found no serious difference in economy between the 100 E10 and the 98 when doing highway driving, and haven't had a tank of 98 round town for comparison.

I don't know if the 100 makes any difference, but it feels like it. Alfalfa was bitching at the last SA cruise about my car having a lot more go than his AXIS, so maybe there's something to it. Don't care if it is the placebo effect!

Yeah might be placebo, but as you say, who cares!

[bigkevracer]

410km off 68L of 100 octane E10.

Works out to 16.6L/100km by my maths.

I'm pretty happy with that. Driving has been a mix of economy loving highways and short blasts. The way I've driven it, I was expecting more like 20L/100km (esp when the fuel light went on and the screen told me to hurry up and fill the thing in weird Japanese). Plus the E10 I was expecting slightly worse economy.

Plus, it wasn't as expensive as I was expecting today with the Easter premium! Win!

[jidge]

12.8l/100km on the 100 RON. As opposed to the 12.5 on 95.

However, no highway driving was done on this tank.

Have Shell 98 in now.

[webng]

Looking forward to seeing how this tank goes after the Nistune. More wishful then hopeful you could say

[KiwiRS4T]

All things being equal your engine will be more efficient so better economy but in my experience if there is more perfromance available people (like me) will translate that extra efficiency into more speed rather than better economy!!