I've been running V-Power on every fill up for the past 8 months probably. Noticed a difference of about 2-3mpg improvement... whether that's worth the cost difference... probably not but I've started so I'll finish! For me knowing that i'm putting the best stuff into my car out weighs the few extra quid it costs. I'm a marketeers dream! It's my car, no finance, so hopefully a way of keeping it in top working order.
Same experience here (but on 1.0EcoTSI). Get 2-3 mpg (on the trip computer) improvement. I usually only use if carrying a full car, and long trips. So if it's just me, perhaps I will see 4-5 mpg improvements.
Most of the time, I will use Esso/Shell 95 otherwise...with use Tesco Momentum 99 now and then.
When I did the calculations back then...it was same costs, cheaper RON 95, but fewer miles per tank, and expensive Shell VPower 99, and more miles.
Tesco Momentum 99 costs in between the two, but doesn't give me any noticible mpg gains over standard Shell/Esso 95 in my experience.
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