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Potash123

Fuel Rating

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I ran out of normal petrol for my Mountfield OHV mower. I put in some Premium Grade petrol in it laced with Castrol R40 which I use for my BSA Thunderbolt. What a difference, running slightly faster and pulls like a train. Will it do any damage. Starts better too !!!

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Might run a bit hotter both due to the higher octane and the added oil making it a weaker mixture, fuel to air wise. very unlikely to do any harm unless worked hard for a prolonged time so revert to standard unleaded when convenient.

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