Petrol/Diesel prices near you

Morris · 2026-05-02T08:47:54+0100

Greeves246 said:
88 octane? That’s only one step above paraffin / kerosene .

We use RON octane rating
USA uses average of RON and MON

Kayos · 2026-05-02T09:00:14+0100

I forgot the numbers but my local Tesco hasn't changed price in either direction for a couple of weeks

reb78 · 2026-05-02T09:58:55+0100

Morris said:
We use RON octane rating
USA uses average of RON and MON

So how would that 88 compare to our 95 out of interest? Is 88 the equivalent of our old 2 star?

Greeves246 · 2026-05-02T11:05:28+0100

Sainsburys diesel 180.9 today.

Morris · 2026-05-02T11:12:21+0100

reb78 said:
So how would that 88 compare to our 95 out of interest? Is 88 the equivalent of our old 2 star?

I had to look it up.

"Because MON is always lower than RON for a given fuel, AKI will always appear as a lower number than the European equivalent. So when an American driver fills up with “93 octane,” they're actually using fuel that would be labelled 98–99 RON in Europe. The fuels are not lower quality — they're just measured differently."

Source https://bluesparkautomotive.com/info-faq/octane-ratings-explained-why-fuel-quality-matters#:~:text=Because MON is always lower,they're just measured differently.