Consuming fuel.

Although it might be contrary to what the motoring journalists reported, I think I might have had a slight increase in E10.

I went from 42mpg to 38mpg when I changed to AT tyres, but my trip computer now believes I'm getting 40mpg.

I'm not entirely sure I believe it.

I have keep a log of the miles every tank gives and have done since the first day of ownership. The MPG obviously varies with use, lowest I have seen is 28mpg, highest is 46 mpg, but you can't tell on just one tank.  ( M13A MT).
Even what you consider to be the same use will give different results, many factors come into play. So far I have seen little evidence that super expensive or cheap supermarket petrol has had any impact. I don't expect to see any difference on E10, but I need to put a lot more tanks through before I get any results.
I don't do it as I am concerned of the actual MPG, it's a means to spot any running issues early, but as it's a Suzuki it's been reliable since day one. I have averaged about 36mpg over the years, which is about the reported expected MPG given on the web.

I learned recently by doing research on finding E5 for my motorbike that tesco have a price differential on super plus unleaded.

On my local forecourt standard E10 is 133.9 whereas they sell momentum for 140.9, I believe the 7p difference is their standard.

I shopped around one day and found that Shell and a tesco express Esso were considerably more expensive, given that these companies buy in very similar product from refineries, I'm not certain for my needs, buying branded fuel will make a worthwhile difference.

wrote:

I shopped around one day and found that Shell and a tesco express Esso were considerably more expensive, given that these companies buy in very similar product from refineries, I'm not certain for my needs, buying branded fuel will make a worthwhile difference.

It is of course, your choice as to where you buy your fuel, but I'd like to suggest your "shopping around" includes a review (as far as you are able) of which resellers are using a detergent additive package - in the long run, it makes a difference.

I have owned my Gen 3 for 2 years now and average 34mpg. I think it would do a bit more if I didn't go over 50mph, but a lot of my daily driving is on fast A roads. I just put ordinary unleaded in.

I recently read a review of super unleaded vs standard, okay it was tested in a performance car, they looked at performance and mpg, different tests and found that supermarket standard fuel was not far behind Shell V Power which was the best apparently.

The extra MPG wasn't worth the extra money, but V Power does include additives which would be a bonus.

 

It is of course, your choice as to where you buy your fuel, but I'd like to suggest your "shopping around" includes a review (as far as you are able) of which resellers are using a detergent additive package - in the long run, it makes a difference.

I was being a bit vague, my current thinking is to continue using E5 in my motorbike by switching to super plus unleaded, it doesn't do many miles and I understand the ethanol doesn't keep well when left in the tank for extended periods. The 7p a litre difference for momentum was worth it I felt.

I'm not really fussed about the jimny, my local independent garage only has standard unleaded and that's what will be going in the jimny from now on.

Just out of interest has anyone been dyno testing E10?! Are we losing power?!

I really need to do a brim to brim mileage calculation on mpg to see if the numbers on the trip computer are accurate.

34 mpg, I am really jealous. Our 2006 Jimny Auto does 25 mpg no matter how or where we drive. Around town in traffic, 25 mpg. On a run with a light foot, 25 mpg. When we bought the car new in 2006, we returned it to a main dealer, who loaned us a car for a week, a Swift, what a lovely car. Anyway after a week of them driving it and testing it, they said 25 mpg was correct.

My 05 auto does about 25 on a run. In back roads and green laning I'm down to 20. I have an OBD app that shows instantaneous fuel consumption and even on a flat road at a steady 55mph it is under 30, which seems crazy for such a small engine. Around 45 on a run sounds much more like what a small car like this should do.