when i first bought the car for the first 4-5 months i ran V power. and also when mapped was using V power. then had to switch for normal shell fuel as V power was out, since then didn't borther with V power anymore. saw no difference in terms of performance.
when doing 40+ miles a day just seems stupid to spend an extra 5/6p a litre when I see no difference, and as to your comment no i don't have a single leak in my air system. pulls to a bar fine and holds -20 vac.
Then as I said; your engine isn't healthy enough to see the benefit and is unable to make use of the higher octane or you're just a bit special
Literally; it is totally night and in all areas. How anybody with a remapped car could say it is not worth it is totally beyond me; it is SUCH a difference.
Have some evidence -
As we all know from recent events I have been ridiculed for data logging; but after a dyno run nobody can argue that my airflow division has in my case accurately been able to calculate my BHP to within 1%. Whilst this doesn't work for everyone; all of my sensors are correct and dividing my airflow by 0.8 had accurately predicted what my car has made on a rolling road three times on the bounce. So it works for me, unquestionably.
I have been seeing 196g/s of airflow every time since my new mapping, the other day I drove to my nearest Shell to fill up. I had a work friend in the car and I did a log to show him how it worked and to explain how I was able to predict my power this way.
Here's the log -
Which divided by 0.8 perfectly calculates my 245bhp. As seen here -
I got to the Shell and they had no V Power, so I didn't have any other choice than to put £20 in. Within miles my engine felt flat, slow, dull and torque was down. So just to cure my curiosity I did a data log -
So as we know that my airflow calculations are right, the vehicle is obviously struggling with keeping the timing nicely advanced due to the lower octane being less controllable under compression. Which has a knock on effect and ******* the timing, which makes the car request less boost, which effects everything down the line.
That's almost a 13bhp loss from three years of NOTHING but V-Power to £20's worth of cheap ****e.
The difference ruined me, so totally night and day. I have since filled up with V-Power and the the car is slowly getting back to what it should be, I've only done 30/40 back on V-Power miles and already my timing is advancing and the car is feeling more potent again. I wish I'd never even put the cheap fuel.
So unlike most; I have proper factual evidence that V-Power benefits my engine with a back to back log within minutes of each other.
