Crappy diesel hurting mpg?

dr.fuzzenstein

I have mostly filled up at a petrol station in Limerick where diesel goes for about 1.29 to now 1.31.
Today filled up at another station (1.33) and, as I sometimes do, zeroed the mpg counter of the car.
Mostly while driving home I can just about hit 50 mpg when driving carefully (110 km/h on motorway), but today, with pretty much the same driving style came home and read 56.4 mpg on the dash.
The first petrol station is one of those "suspiciously cheap" ones and the second one is actually an automated pump in our industrial estate but connected to a reputable fuel merchant.
The difference in mpg is so pronounced and I have never managed to achieve that kind of consumption before, one can only wonder (or suspect dodgy computer).
Anyone else found their mpg jump up after switching diesel?

vectra

dr.fuzzenstein wrote: »

I have mostly filled up at a petrol station in Limerick where diesel goes for about 1.29 to now 1.31.
Today filled up at another station (1.33) and, as I sometimes do, zeroed the mpg counter of the car.
Mostly while driving home I can just about hit 50 mpg when driving carefully (110 km/h on motorway), but today, with pretty much the same driving style came home and read 56.4 mpg on the dash.
The first petrol station is one of those "suspiciously cheap" ones and the second one is actually an automated pump in our industrial estate but connected to a reputable fuel merchant.
The difference in mpg is so pronounced and I have never managed to achieve that kind of consumption before, one can only wonder (or suspect dodgy computer).
Anyone else found their mpg jump up after switching diesel?

If I use Amber oil Diesel i get about 70 or so kilometers less to the tank

I normally use Topaz.. I am happy enough with it.

Was toild recently by a friend driving a Golf that if he uses Teaxaco as opposed to Topaz he get at least 90 kilometers to the tank

was it any of these fuel types you have used??

Would be interested in the latest one you filled with so as to try for myself..

But isnt there a theory that in colder weather the diesel engine will be heavier on fuel??
I have noticed a big increase in temps in weather ove the past 2 days but this didnt help my mpg on topaz fuel though

dr.fuzzenstein

vectra wrote: »

I

was it any of these fuel types you have used??

Would be interested in the latest one you filled with so as to try for myself..

But isnt there a theory that in colder weather the diesel engine will be heavier on fuel??
I have noticed a big increase in temps in weather ove the past 2 days but this didnt help my mpg on topaz fuel though

Have tried mostly Topaz and the other one was Emo (no, not a moody teenager:D), but this one is some automated fuel pump in an industrial estate run by some fuel merchant and I haven't even looked at the name.
Used to get only Texaco because our company gave us their fuel cards (greatest things on earth, get someone else to pay for the fuel) but I never cared for mpg, leadfoot all the way.
In cold weather any engine should put out slightly more power as cold air is denser, especially if the engine has a turbo with intercooler.
You will also find that the higher up you go, the less power you have, but there's nowhere high enough in Ireland to feel the difference...

-Corkie-

If you fill your car on a very cold morning the Diesel is more denser. You will get another bit of value for money.

dr.fuzzenstein

-Corkie- wrote: »

If you fill your car on a very cold morning the Diesel is more denser. You will get another bit of value for money.

I like it!:D

vectra

-Corkie- wrote: »

If you fill your car on a very cold morning the Diesel is more denser. You will get another bit of value for money.

Heard that before..
Wondered why there was a big queu at the pumps during the freezing weather :rolleyes: