xtrailman said:
He knew what he was talking about that's for sure.
Having tried the expensive fuel with my last cx-5 i did find i was getting another 2mpg, but no noticeable increase in performance, however the cost of the fuel meant there was no financial savings.
RobJax did mention the fact that any improvement in fuel consumption might be wiped out by the increased cost. As an alternative, he mentioned after-market additives. On that point, he wrote,
"Aftermarket products like Millers improve the cetane rating of standard diesel, but only when the engine is cold - interestingly it doesn't help a hot engine - so cold starting is usually quieter but no difference to a hot engine - and Millers does provide good, additional pump lubricity.
......................... stick with the regular diesel fuel, and add Redex or Millers at the recommended dosage level - adding more won't improve the performance.
And don't be dismissive of supermarket fuel, it can and often is identical to branded fuel."