Just thought I might make up a quick post about Shell V-Power, I've been using it in the Calais for the last week. V-Power has replaced Optimax as Shell's best fuel, it's supposed to be an all new formula, developed by Ferrari, blah blah blah. Anyway, I thought I'd give it a go, since Dad only ever puts regular ULP in it. The car in question is a 2004 VY2 Holden Calais with 235kw 5,7 LS1 V8 and 4spd auto.
I've noticed an increase in economy. My Dad usually averages 14l/100km on 91RON ULP, this is city driving, but mostly at at least 80kmh, with a fair bit at 90kmh. He is also a quite, well, sedate driver. Doesn't really give it any, cruises around.
Now, I drive it much harder. Usually rev it out through 1st and 2nd, out to about 3-3500rpm then lifting off to make it short shift through 3rd into 4th. Going everywhere at least 80kmh, usually about 100kmh in 80 and 90 zones. On 91RON the economy was usually somewhere between 15 and 16l/100km.
Now, with V-Power, it has dropped down. First tank stayed around 14l/100km, now staying down around 13.5l/100km. This is including a (rather rapid) drive through the Brindabella's along Paddy's River Road (nice and twisty ) 3-up. So I'm impressed. I could see my Dad getting down below 13l/100km. Seems to rev a little nicer and swing out to the limiter a little more smoothly (still a little strained, needs a better intake.) Dunno if it's worth an extra 10c p/litre though.
(And if anyone thinks this is spam, you can delete it. But I thought some here might be interested)