xxdrteethxx

Hello Rojie! I thought I would add, the 2AZ FE fitted in the Alphard/Vellfire is also fitted in one of the most common cars in America, the Camry. This car runs on the lowest grade American fuel (which is absolutely terrible) just fine. As far as fuel economy goes, it doesn't really make sense for the Alphard to use a premium fuel to get better fuel economy. Cheaper fuel burns easier, and because we aren't using a performance engine or a tuned 2AZ, there's really not a worry about pre-ignition. I do want to run tests still, data is always the answer.

Toyota FSE engines are direct injection or dual injection, direct and port. They need to run on a premium fuel because they are leaner, less flammable. If you tried to run them on standard petrol you will suffer with pre-ignition and your car will run terrible if it all (some models won't allow it). Most cars with lower compression rates and port injection run on standard fuel, more often than not. As for the ethanol ratio who knows, but Toyota's are built to last. It would be nice to see more fuel economy figures from the 20 series. I will try to sort some out on our trips this year.