Premium unleaded versus Additive

[Dapplepony8]

Now that we are experiencing an increase in petrol prices I wanted to ask if using an additive with standard unleaded fuel is cost effective and
equally ok as premium?

James

[amgrave]

If you mean Unleaded plus Octane booster verses Super Unleaded there is not much between them re cost and Octane rating. If you mean something else please elaborate.

[Monty-4]

Unless you've raised your compression ratio a lot via modifications I don't think there is any advantage to premium (higher octane) fuel, other than a possible lack of modern additives (ethanol I think) that can corrode rubber fuel pipes that go from the fuel pump to the carb.

Go with the cheap fuel! Possibly with a proven lead additive if required.

[Dapplepony8]

If you mean Unleaded plus Octane booster verses Super Unleaded there is not much between them re cost and Octane rating. If you mean something else please elaborate.

Thats correct and I think the price difference would be negligible on second thoughts

[Dapplepony8]

Unless you've raised your compression ratio a lot via modifications I don't think there is any advantage to premium (higher octane) fuel, other than a possible lack of modern additives (ethanol I think) that can corrode rubber fuel pipes that go from the fuel pump to the carb.

Go with the cheap fuel! Possibly with a proven lead additive if required.

Thanks for the advise ill check out the additives