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They are certainly guilty of crossing truth lines.
www.abc.net.au
That’s all I use. It’s says it on the door. The cost/mileage differential favors regular. I’m rarely doing anything but casual acceleration that I should benefit from the ability to advance timing more.
Someone i know works for Shell in the laboratory. I asked about the premium fuels, prior to the increase of ethanol in UK standard petrol. She told me it is worth using every 4th or 5th fill as it doe genuinely cleans the engine. It wasn't worth using consistently unless you were driving a high performance vehicle.
Since the change we only use the premium E5 for the petrol. My Grenadier is diesel and you don't get so many premium pumps, plus if I used the premium I'd have to pay for it. I have thought about using an additive but unsure on these modern engines.
