Is it just me or is 300 miles just about right for a full tank of fuel in the st 170? I can caine all hell out of it and the worst i do is 270 miles in about 4 days (i'm not talking about 140mph up and down the motorway all day long) but i can drive like an 80 year old and the best i've ever got is 305.

And does anyone rate any of the cleaner fuels like shell optimax and the other 2? i've ran 2 full tanks of optimax through and i aint gone any thurther or faster, the only thing i've noticed is the car sounds louder from 5,000 revs and upwards. Anyone else had this?

 

the more i cane it, the less i do think ive done about 40 miles on a tenner before

on a full tank ive had over 400+ miles driving normal.

(not an st170 tho, just a 2L)

as for fuel, i cant tell a difference, even when i put optimax in the turbo i cant tell

 

mate i do the same full tank and its comes 270 to 300 miles depands how i drive that beast... 2Ltr Zetec might do more miles but u know its aint that fast like ST....

i put optimax once in a month in my ST170 and to be honnest its totally standard i mean NO ENGINE MODS and its on 177.7 BHP and i m well happy...

CheeRS
Ali

 

Yep 300 miles on a tank of fuel is the average on my ST170.

I have managed 401 miles on a tank fo fuel but that is proper 60 mph cruising on motorway for 300 miles

 

Yeah - defo rate optimax in mine. Might be just me but mine seems to pull better (mid range torque) on optimax as opposed to 95ron premium.

Mine ran 168.7bhp on 95 ron, so would be interested to see what optimax does?

 

Sorry to say but optimax wont make any difference to the engine on the ST170. The only reason to run optimax on a performance engine is if the timing has been adjusted closer to the limit of pinking / det (usualy for higher boost on turbo engines) the hgher RON rating that optimax has will help to reduce the chances of det / pinking

The ST170 engine has no way of knowing wheather you have filled up with 95 ron or 98 ron so its programmed for 95 ron to keep the engine safe

Now with the bluefin fitted you can reprogram the ecu to tell it your using 98 ron (optimax) and that could make a small difference

 

cheers lads them ?s where always nagging at me I'm glad my mileage is about average, shame it dont do more though. And i always thought the optimax made no diffrence in mine so its back to the cheaper norm for me.

thanks again.

 

i drive a st170 and it gives me around the 300mile mark and i have to agree with andyrst optimax makes no difference and besides the engines designed to run 95 ron unless you do more mods where maybe you can then run 97 or 98 ron.

 

I don't think that you'll notice the difference on the road, if you drive on the track and keep the revs well up it will help a bit but don't expect to much. Also I don't know wether this is true but I've heard that Optimax actually cleans the engine as it goes? I think that this would be more beneficial than anything else if that is the case.

Ant.

 

i have got 400+mls out of one tank and i do think that using optimax i have a better midrange also

 

I understand as every says above that the ST isn't tuned for 98ron fuel, but it might be that it is better quality/refined fuel than boggo standard 95 tescos crap - maybe? , defo better mileage out of it n.e. way

 

To be honest, you will never see more than 300 miles in the ST. The tDCI does around 400 miles per tank.