Donate to the MX-3.com Forums
View unanswered posts | View active topics It is currently July 03 2020, 12:47 PM



Reply to topic  [ 54 posts ]  Go to page Previous  1, 2, 3, 4
 Super 
Author Message
Regular Member
User avatar

Joined: November 13 2004, 3:01 AM
Posts: 167
Location: London, UK
Reply with quote
Post 
That's cool!

When I fill up, I usually have about 10 litres left in the tank, having done 270 to 280 miles. To scared to run out of petrol.
Also never take my car past 4000rpm unless its an emergency.

Not bad mileage for either of us then!

Thunderstorm

:P

_________________
1998 MX-3 RS 1.6i DOHC "Blackbird". Totally Stock.

The 21st Century is a con; where is my Hovercar?!

http://www.cardomain.com/ride/2058708


August 14 2005, 3:25 PM
Profile YIM WWW
Regular Member

Joined: April 08 2004, 2:01 AM
Posts: 69
Location: Warsaw, Poland
Reply with quote
Post 
Thunder, you should easily pass 300 miles, cause 1.6 dohc in stock has lower fuel consumption then the V6 by an average of 1 - 1.5 liter.

Take care

_________________
"For those 10 seconds or less, I am free"


August 15 2005, 4:38 AM
Profile
Regular Member

Joined: April 08 2004, 2:01 AM
Posts: 69
Location: Warsaw, Poland
Reply with quote
Post 
I think I am going to leave the idea with 98 octane fuel... The price has reached 1.1 Euro :shock:

_________________
"For those 10 seconds or less, I am free"


August 22 2005, 2:13 AM
Profile
Regular Member

Joined: April 08 2004, 2:01 AM
Posts: 69
Location: Warsaw, Poland
Reply with quote
Post 
A small update...After emptying the whole 40 litres of 98 fuel I subjectively find no performance gain and a small (coincidence?) economy boost (about 15-20 kilometers).
Today I refilled with 98 again, we shall see if this was not a coincidence

_________________
"For those 10 seconds or less, I am free"


September 06 2005, 11:43 AM
Profile
Regular Member

Joined: March 14 2004, 3:01 AM
Posts: 64
Location: Yorkshire
Reply with quote
Post 
valdigre wrote:
A small update...After emptying the whole 40 litres of 98 fuel I subjectively find no performance gain and a small (coincidence?) economy boost (about 15-20 kilometers).
Today I refilled with 98 again, we shall see if this was not a coincidence


I agree entirely. I've run occasional experiments and I find:

1. No performance gain.
2. Higher flatspot (usually at 3800rpm, slightly over 4000rpm with 97/98/99RON)
3. Marginal economy increase (roughly 0.5mpg, representing a microscopic saving in cost in favour of Super Unleaded).

None of this surprises me. Super Unleaded assists high compression engines by ensuring the fuel detonates in the chambers and not before ("preignition", "knock" or "ping"). The MX-3 V6 has a VERY low compression ratio of 9.2:1 so, while it's capable of advancing the timing to take advantage of the Super Unleaded, it will achieve better performance with 95RON. And, as the engineers always say, you should always run the lowest octane rating you can that gives you no pinging.


September 06 2005, 5:23 PM
Profile WWW
Junior Member

Joined: August 22 2005, 3:56 PM
Posts: 14
Reply with quote
Post 
i havent noticed any difference running optimax, or regular unleaded, usually get around 270-280 to a tank

_________________
It only does what to the gallon?!


September 07 2005, 10:45 AM
Profile
Regular Member

Joined: March 14 2004, 3:01 AM
Posts: 64
Location: Yorkshire
Reply with quote
Post 
Geeman wrote:
i havent noticed any difference running optimax, or regular unleaded, usually get around 270-280 to a tank


I use the "75mph cruise" method.

I frequently run a set journey of 231 miles. There's an uphill (going North) and a downhill (going South). I've collected lots of figures over the past couple of years and, factoring in the time taken, I've come out with a good idea of how much fuel I should use in each direction for a given time. Granted this is subject to several variables, but as a rule of thumb it's not bad.

With Optimax (97RON) it returns about 2 litres less than it ought to for the same journey in the same time with regular (95RON). With BPUltimate (98RON) and Tesco Super Unleaded (99RON - it's really just 95RON with Octane Booster additives) the difference is not as noticeable. BPUltimate is hideously expensive and Tesco Super Unleaded is just crap - you have to add "thinking time" to acceleration, while the engine works out what the hell to do - so I steer clear of both.

Incidentally, the 231 mile trip takes just over a half tank, for ~38mpg.


September 07 2005, 2:34 PM
Profile WWW
Regular Member

Joined: February 04 2005, 6:14 PM
Posts: 224
Location: UK
Reply with quote
Post 
valdigre wrote:
Hi there,
Your low numbers are scaring me, either you are driving your cars like racing drivers whole the time


:lol: yeah, that'd be right 8) once the engines fully warmed up, its playtime... took mine to the track the other day, started on a full tank .. when it came to fill up, I worked out the miles/ litres-in and was getting 22mpg ;) hahahaha gotta love what a trackday does to the fuel... oops!

I find that now my engine is all cleaned out from using Optimax, I can use standard 95RON fuel fine.. I think my engine was in crap shape when I bought the car.. previous owner probably never gave it some redlining / proper driving goodness to clear it all out :D

:edit:

thunderstorm, you posted you never take it above 4000rpm! go on, its fun ;) what a noise! just make sure the oil is up to temp first.... :lol:

I drive my car harder these days, ive got a 92 decibel (had it sound tested @ the last trackday) "longlife" (custom made) cat-back system on there... the top-end noise is just amazing, you really get that "6 cylinder scream" coming out of it... plays a note.. it sings... I absolutely love it :D

_________________
1997, Silver, V6


September 28 2005, 4:03 PM
Profile WWW
Regular Member
User avatar

Joined: October 13 2005, 11:29 AM
Posts: 40
Location: Galway, Ireland
Reply with quote
Post 
I run Optimax in Ireland (V-Power) and get 32+ mpg from my V6.
This is nearly always with a 150mile cross-country trip, with at least 75 of that at 60-75mph, and the rest a mix of stuck-in-traffic commuting and zipping down the lanes.

I used to get 38mpg running my old 1.6 Rover on Optimax, so a drop to 32mpg seems acceptable to me for the increase in driving pleasure!

I think if I drove sensibly the whole time and did a long journey at a steady speed I could get a lot closer to 38-40mpg.

Let's face it though, with the gearing and engines our cars have we're never going to get very good mpg.

_________________
Stock '93 V6.


December 08 2005, 5:53 AM
Profile
Display posts from previous:  Sort by  
Reply to topic   [ 54 posts ]  Go to page Previous  1, 2, 3, 4

Who is online

Users browsing this forum: No registered users and 1 guest


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum

Search for:
Jump to:  
cron
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group.