Where are you getting those extra ponies Ali? are you spending the £3 on a Mars bar and putting your feet through the floor and doing a Fred flintstone?Not sure about you chaps, but for the £3 difference in a full tank, I go Optimax every-time. The car runs cooler, I get a couple more ponies and reduce the risk of knock too. But I only do 1k - 2k miles a year so the difference in cost is very small compared with the expensive parts we buy for these beasts!
It seems Super unleaded will remain E5 so we are OK for now ...
https://www.autocar.co.uk/car-news/industry/government-plans-e10-petrol-switch-2021
Worst case, we get a good excuse to replace those old fuel lines we haven’t seen for ages
Not sure about you chaps, but for the £3 difference in a full tank, I go Optimax every-time. The car runs cooler, I get a couple more ponies and reduce the risk of knock too. But I only do 1k - 2k miles a year so the difference in cost is very small compared with the expensive parts we buy for these beasts!
It seems Super unleaded will remain E5 so we are OK for now ...
https://www.autocar.co.uk/car-news/industry/government-plans-e10-petrol-switch-2021
Worst case, we get a good excuse to replace those old fuel lines we haven’t seen for ages
Where are you getting those extra ponies Ali? are you spending the £3 on a Mars bar and putting your feet through the floor and doing a Fred flintstone?
There isn't more energy in 98 octane fuel than 95 octane fuel, there's just more resistance to knock. Therefore to get more power out of higher octane fuel you need more compression, more ignition advance or perhaps leaner mixture.
Put another way, if a given engine and map isn't knocking with 95 Ron, you'll get no difference at all with 98 Ron.
But sure, it's decent insurance against knock and maybe the detergents package is better.