16 replies to this topic

[Swift_General]

When mixed as recommended if effectively adds about 5 pence to a litre of petrol. So if your conversion is to cost £150 then 3000 litres, or about 660 gallons is your break even point, or about 20K miles @ 30mpg. As pointed out above it does provide an octane boost which may or may not be useful depending on your engine.

[59 Speed]

I bought some additive, then when I put my head number into google I discovered that it's an SPI head, the only head that you can definitely identify as being unleaded from the cylinder head number.

Is this some sort of sales pitch 🤔