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300 KM per tank how lame is that??? New oxygen sensor and plugs and the engine runs fine, what gives?

[DO NOT PUT THAT CRAP IN TH#E SUBJECT]

That sounds about right to me, I usually get that with mostly city driving. Highway driving is between 400 - 500 Km per tank

How many liters does 300km use?
Automatic or manual?
Check your alignment, maybe try changing your brand of fuel (anything more than regular 87 octane is overkill for our cars)
Try accelerating a bit easier. Driving habits affect mileage big time.

5 spd DOHC. Thats normal driving!!!!! the alighnment is fine (car doesnt pull) the tank is like 40 liters. This is so whack

How much throttle are hyou using and where are yhou shifting at? The lowest i had gotten out of my BP was around 10 (miles per gallon) and its hard to get that.

Have you tried running a diffrent gasoline brand as well?

The gastank is 50 liters, not 40.

How many kilometers would 10mpg be?

but on avg i get about 31-34mpg daliy driving. 1.6 sohc

I shift around 3000 Rpm 85% of the time 3000-4500 rpm the other 15%.

piper177 wrote:The gastank is 50 liters, not 40.

How many kilometers would 10mpg be?

16.1


The DOHC really is a lean burn motor though, something has to be out of whack for you to get that low of milage. What all reguluar maintecene items have been done in the last 50k KM or so.

Darcy wrote:How many liters does 300km use?
Automatic or manual?
Check your alignment, maybe try changing your brand of fuel (anything more than regular 87 octane is overkill for our cars)
Try accelerating a bit easier. Driving habits affect mileage big time.

Anything over 87 octane is overkill for the RS DOHC?
Nay, not so methinks.
I have been running my 1998 RS DOHC on Super Unleaded - 97 RON fuel since shortly after I bought it in November 2004.

Initially I used ordinary unleaded.
Then switched, just to see if there would be a difference.
There was - and has been since.

The engine ran smoother, quieter, and I got a quicker acceleration response. Oh, and my MPG did go up noticeably.

If I run normal fuel, I get less.

Recent figures (today actually) - for 40 litres of Shell V-Power Fuel (99 RON), I got 362KM out of my MX-3. That is with NO motorway / Highway driving, all city driving, and occasionally, giving it a bit of a thrashing when road conditions permit.

Don't forget the differences between liquid measures in the UK and the rest of the world, but I believe, nay, know that my MX-3 benefits from high octane fuels.

Thunderstorm.

I will fill up today or tommorow. I'll try premium, see if that helps. New spark plugs and oxygen sensor, will change oil on Friday.

I normally get anywhere from 270 -315km with my BPT running 10lbs of boost.

nickmx3



When you did the brake swap did you swap the master cylinder also or just throw the back GS end on?

I got the disk brakes from a j spec mazda familia gtx, bg chasis, just use the rear spindle, it fits the arms of the mx3 and no i didnt use the master cylinder original mx3 master cylinder.

Thanks dude, planning on doing it in the summer