I always run my cars on Shell Optimax or whatever it's called now unless I have no other practical option, I've found it gives the best fuel economy as well as really healthy looking spark plugs and clean exhaust ports/turbines when swapping turbos over. I think they've gotten the additives just right and it's the highest octane available, I use to drive 18 miles to fill up and I'd always time it so I was practically empty before getting there. Was always a major outlay in one go but I figured I'd be saving the cost of driving there and back in improved economy over 20 quids worth of crappy 95 Ron fuel here and there.
Besides my S2 didn't like 95 Ron stuff very much at all, it was mapped very aggressively, though my RS2 seems to tolerate it better.
I recon 520 miles is doable in a FWD 7A, though it would have to be a nice constant 70mph and on the motorway or at least really straight A roads with very few junctions or roundabouts and off the throttle down hill etc.
I think the 20V motor if driven sensibly is going to be more economical than a 10V, it's not K-jet to start with!
I could just about get 400 miles out of tank with my S2 if it was just pottering around, though I could easily half that if giving it any serious stick.
I can't remember exactly now but a good mate of mine who also owns an RS2 wanted to see what it could achieve if driven super sensibly on the way back from Scotland after moaning about how much fuel we used on the M6/M74 on the way up with me leading at night in not sensible mode in my RS2. I think we got something like 420 miles on a tank before being practically empty, I know we went quite a long way with fuel lights on. I do recall us both getting 31.something MPG which I though was excellent for a car of that size and weight with four wheel drive. He was running a fairly aggressive map on the stock turbo and my car is probably around the same power all be it with a bigger turbo which I think pretty much evened things out.
Besides my S2 didn't like 95 Ron stuff very much at all, it was mapped very aggressively, though my RS2 seems to tolerate it better.
I recon 520 miles is doable in a FWD 7A, though it would have to be a nice constant 70mph and on the motorway or at least really straight A roads with very few junctions or roundabouts and off the throttle down hill etc.
I think the 20V motor if driven sensibly is going to be more economical than a 10V, it's not K-jet to start with!
I could just about get 400 miles out of tank with my S2 if it was just pottering around, though I could easily half that if giving it any serious stick.
I can't remember exactly now but a good mate of mine who also owns an RS2 wanted to see what it could achieve if driven super sensibly on the way back from Scotland after moaning about how much fuel we used on the M6/M74 on the way up with me leading at night in not sensible mode in my RS2. I think we got something like 420 miles on a tank before being practically empty, I know we went quite a long way with fuel lights on. I do recall us both getting 31.something MPG which I though was excellent for a car of that size and weight with four wheel drive. He was running a fairly aggressive map on the stock turbo and my car is probably around the same power all be it with a bigger turbo which I think pretty much evened things out.
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