Premium or Supermarket Fuel?

NM_OLD

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Until recently I have been in the habit of buying Tesco's fuel, primarily for the clubcard points to earn Brownie points from my better half...
However, about 3 years ago I experienced hesitation when accelerating, which turned out to be a part blocked diesel filter (I always change these, every service, even though the Jaguar schedule is, I believe, every other service) and the first question my Jaguar specialist asked was: 'Are you using supermarket fuel?'
Wether this was the cause or not, I have since always used, and convince myself the car runs better on, BP Ultimate diesel. I know its stupidly expensive but I love the car, its re-mapped so maybe less tolerant of poor fuel (?) and I'm doing less miles after taking early retirement so still have less fuel costs 😜
Substitute Shell V Power for BP Ultimate and this mirrors my experience exactly.
 

GRTD

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Just looked and Jim's car above doesn't have an MOT! Also - "Date of last V5C (logbook) issued12 May 2021" ??
Get yourselves up to Duns and visit the Jim Clark museum, better still do it while the JC Memorial Rally is on in town. Quite the spectacle!
 

Bronco

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I remember about 15 years ago filling my 2.7D S-Type up with BP Ultimate or Shell V-Power, I can't remember which. What I can remember was that the car immediately sounded like a bag of nails - it was awful, so clattery! I couldn't wait until I had done a few miles so I could start to top up with 'ordinary' diesel, and progressively dilute the tank-full of super fuel with ordinary fuel until the clatter faded away. I have never bothered (or risked) trying 'super' fuel since then. I've used supermarket fuel from time to time, not really noticed any difference from major brands.
 
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Xji661

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Never had much joy with any of the BP fuels. Never a issue with momentum or v power tho
 

GRTD

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Tend to agree, I’ve been using a combination of Shell V-Power and Tesco Momentum (99) for years in my XJ6 and now XJR with no issues (probably >60%of my fills at Shell).
Just recently found out that the local ESSO garage now stocks the Synergy Supreme+ 99 fuel…which I’ve started to use for both my Jag and my tuned 1970 Lambretta (which benefits from the fuel being ethanol-free).

Which begs the question, if all of the tankers “contain the same stuff” how is it that some of the fuel has nil ethanol whereas the majority of it does?
 

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DrFutura

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I needed fuel in my scooter which only takes 8 litres, so I thought I might treat it to some Shell VMax. Not a chance, the VMax is now 15p a litre more than standard unleaded, which is already overpriced at 6p per litre more than the fuel station nearest to me. How the hell do they justify the extra 15p?
 
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