Guess Petrol Does Make a Difference
Discussion
2.7L 987 Boxster and I've always filled up with V Power from new and averaged 27.7mpg (and found the onboard computer to be very accurate).
The last couple of weeks I've ran a couple of tanks of Sainsbury's Super Unleaded as it's cheaper (87.9p vs. 92.9p for V Power) and supposedly BP fuel.
The car did feel more sluggish/less responsive on the Sainsbury's. Anyway I ran the tank low and went back to V Power and right away it feels like the car is back to how it's been from new, it's too early to confirm the mpg will creep back up.
Could be my imagination I suppose but I was certainly surprised at the difference.
The last couple of weeks I've ran a couple of tanks of Sainsbury's Super Unleaded as it's cheaper (87.9p vs. 92.9p for V Power) and supposedly BP fuel.
The car did feel more sluggish/less responsive on the Sainsbury's. Anyway I ran the tank low and went back to V Power and right away it feels like the car is back to how it's been from new, it's too early to confirm the mpg will creep back up.
Could be my imagination I suppose but I was certainly surprised at the difference.
It does indeed make a difference. I took a detour to go to a garage I know has BP Ultimate this morning. When I got there they'd run out ! As the car was running on fumes I ended up putting in £15 worth of "standard" unleaded to get me to the next available Shell garage.
The difference was clear pretty much immediately, the car felt unresponsive, lacking in boost and unwilling to rev at the top end.
I ran the car till it was practically empty again ( it didn't take long !!) before brimming it with Shells finest. Everyything is now back as it should be
The difference was clear pretty much immediately, the car felt unresponsive, lacking in boost and unwilling to rev at the top end.
I ran the car till it was practically empty again ( it didn't take long !!) before brimming it with Shells finest. Everyything is now back as it should be
944S2. Tank of Sainsburys gives 400 - 420. Tank of V-power gives 440 - 460. The decrease in consumption outweighs the increased cost. As for performance, well that doesn't interest me, sorry. Also, recently the car conked out twice whilst running low on Sainsburys fuel. Sweet as a nut, or as a 160000 mile nut can be!
Maverick73 said:
For what its worth my OPC told me that regular 97 is fine and will make no difference. I've yet to fill up since I picked the car up last week, but maybe I'll give it a go......
All I can say is try it. As I said I'm prepared to accept it could be placebo but I'm pretty sure it's not, especially as the trip computer now shows around 28mpg and every time I've used a "proper" mpg calculator it's shown the computer to be spot on.
john ward said:
944S2. Tank of Sainsburys gives 400 - 420. Tank of V-power gives 440 - 460. The decrease in consumption outweighs the increased cost. As for performance, well that doesn't interest me, sorry. Also, recently the car conked out twice whilst running low on Sainsburys fuel. Sweet as a nut, or as a 160000 mile nut can be!
Yep, I get about 10% more miles out of a tank when on Tesco's 99 RON than on standard stuff, so the 5% more it costs is money well spent.
9hellheaven said:
Bit like corn flakes..same stuff but in different boxes!
If its called V-power it sounds faster thats all..heay mum I CAN RUN REALLY FAST IN MY NEW PUMPS!!
If its called V-power it sounds faster thats all..heay mum I CAN RUN REALLY FAST IN MY NEW PUMPS!!
dont agree.
My GT3 really doesnt like tesco 99. for some reasons it feels lumpier and doesnt have the high end kick that shell optimaxor vpower had.
It really is quite noticable.
peterpeter said:
9hellheaven said:
Bit like corn flakes..same stuff but in different boxes!
If its called V-power it sounds faster thats all..heay mum I CAN RUN REALLY FAST IN MY NEW PUMPS!!
If its called V-power it sounds faster thats all..heay mum I CAN RUN REALLY FAST IN MY NEW PUMPS!!
dont agree.
My GT3 really doesnt like tesco 99. for some reasons it feels lumpier and doesnt have the high end kick that shell optimaxor vpower had.
It really is quite noticable.
My 993 was poorly on Tesco 99, bad hot idle from cold. Took about 3 tank fulls of shell to get it back to normal.
9hellheaven said:
Bit like corn flakes..same stuff but in different boxes!
If its called V-power it sounds faster thats all..heay mum I CAN RUN REALLY FAST IN MY NEW PUMPS!!
If its called V-power it sounds faster thats all..heay mum I CAN RUN REALLY FAST IN MY NEW PUMPS!!
It's only been a couple of days since switching back but I disagree.
The car does feel more responsive than on the Sainsbury's, basically it's exactly as I remember it being before.
Also if it is in my head the trip computer is also imagining it as it's consistently shown higher mpg despite my doing exactly the same route.
Obviously I'll have a better idea when I use more fuel and have to fill up and can do the mpg calc properly.
There's a small difference between V-Power and BP Ultimate. But there's a much bigger difference between V-Power and other super unleaded 97s - even main stream branded fuels like Texaco etc.
I arrived at Brands running V-Power and it was great. Midway through the day had to go to refuel at the Texaco around the corner (high volume turnover). There was an immediate difference when I went back on track... it felt like the car had lost 20-30hp, and it was sluggish at every point on track.
More significant since the ECU had adjusted itself to WOT on track and was running at full potential. These cars have very high compression engines and are very sensitive to fuel octane/quality.
I arrived at Brands running V-Power and it was great. Midway through the day had to go to refuel at the Texaco around the corner (high volume turnover). There was an immediate difference when I went back on track... it felt like the car had lost 20-30hp, and it was sluggish at every point on track.
More significant since the ECU had adjusted itself to WOT on track and was running at full potential. These cars have very high compression engines and are very sensitive to fuel octane/quality.
Forgive me for my ignorance, but can i run V-power, ultima or premium unleaded on a (1990) 964 C4 ?
Also, does it cause any problems to switch between normal unleaded and the premium fuels, ie perhaps ending up with a mixture of the two in your tank?
Quite interested in finding out if i can notice the difference.
Also, does it cause any problems to switch between normal unleaded and the premium fuels, ie perhaps ending up with a mixture of the two in your tank?
Quite interested in finding out if i can notice the difference.
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