Supermarket Fuel - Bad Buy?

victor2

If I fill up at my nearest garage, I will always calculate a higher than average mpg out of the previous tank full. Similarly, if I next fill up elsewhere, I get lousy mpg from my local.
The reason? My local garage has a slight slope on his forecourt, so I get less fuel in when I brim the tank. It's a good few litres, so does affect the mpg calculated. Suppose if I drove in from the opposite direction I'd get more fuel in and reverse the effect.

Ultrasonic

Strider590 wrote: »

Or perhaps they just removed/purged the junk from the cheap fuel you'd been using for years?

When you descale a kettle, do you blame the distilled vinegar for all the junk that comes out?

If a fancy fuel cleans the engine, what actually happens to what is removed? Is it burnt up to leave as exhaust gases? Would you feel that?

I tried Fuelsave Diesel for 3 or 4 tanks but stopped when my car seemed to be running a bit rougher than usual. I noticed no significant chang in fuel economy, such as can be judged amongst all of the other variables affecting mpg.

Wh05apk

Ultrasonic wrote: »

If a fancy fuel cleans the engine, what actually happens to what is removed? Is it burnt up to leave as exhaust gases? Would you feel that?

I tried Fuelsave Diesel for 3 or 4 tanks but stopped when my car seemed to be running a bit rougher than usual. I noticed no significant chang in fuel economy, such as can be judged amongst all of the other variables affecting mpg.

Exactly the same issue I had, although I did notice a slight improvement in MPG, the running was so bad that I was struggling to maintain 50mph around the M25 at points, and was seriously thinking it was about to cut out.

As Ultrasonic says, it may be the "additives" cleaning the crap out, but previously they were doing no harm!

Ultrasonic

I never had trouble maintaining speed or anything like that, it just sounded and felt a bit rougher. I remenber after one long motorway trip opening the bonnet and having a listen as I was worried there may be a bigger problem.

hgotsparkle

I find that tescos fuel runs down quite quickly in my car, asda and shell seem to last longest on a half tank (never fill it up!). I tend to use esso most though as there is no shell near where I now live.

FreddieFrugal

hgotsparkle wrote: »

I find that tescos fuel runs down quite quickly in my car, asda and shell seem to last longest on a half tank (never fill it up!). I tend to use esso most though as there is no shell near where I now live.

Perhaps you drive more aggressively from the Tesco forecourt having had a poor experience in the shop. I know I have.

jackthenipper

I've now changed to a Diesel, but when I was using a Petrol car, the fuel from Sainsbury's seemed to last longer than any other supermarket forecourt.

Can't comment on how Long Diesel fuel lasts from Sainsbury's, as I haven't yet needed to add fuel, but I will certainly check my findings.

Has anyone else had this scenario?

worried_jim

"Seemed to last longer"- very scientific! Try using www.fuelly.com to record your usage a little more accurately.

Ultrasonic

jackthenipper wrote: »

I've now changed to a Diesel, but when I was using a Petrol car, the fuel from Sainsbury's seemed to last longer than any other supermarket forecourt...

If you really want to compare fuel economy you want to start looking at brim-to-brim mpg measurements, not 'how long it lasts'. If you don't want to do the calculations yourself, then you could use Fuelly.com. Here's a link to my record as an example (click on it for more info.):



Edit: I wrote above while Worried Jim was posting. Like minds :-)

jackthenipper

worried_jim wrote: »

"Seemed to last longer"- very scientific! Try using www.fuelly.com to record your usage a little more accurately.

I'm going to treat your post with the contempt it deserves.

This thread isn't/wasn't a scientific experiment, just opinion of supermarket fuel.

So jog on Jim & wind your kneck in.....