Alternative to Unleaded Petrol

[david.brogan]

Over the last few years there have been experiments using Sunflower oil to power diesel engine cars.  Does anyone know of similar experiments as an alternative to unleaded fuel?

[KebabMeister]

Was sunflower oil used in petrol engines though?  I thought it was used in diesel engines?

Unleaded petrol is more refined than both diesel and sunflower oil so I wouldn't expect it to work.  Modern unleaded petrol is usually 95 Octane (with super being 98 Octane - same as old 4 star).

[Tim Baxter]

Perhaps not an alternative to sunflower oil but certainly cheaper than petrol is L.P.G. at 30-odd p per litre.  You can get a grant to convert your petrol engine.  The gas gives slightly less power than petrol and slightly less m.p.g. but works out overall a lot cheaper.  The conversion is reversable should you need it.