I'm using the washable air filter from Blade, I just cut out a tupperware tumbler for the tube extension and have the whole filter fitted inside the original filter box.

Original Innova/Fortuner/Hilux air filter cost P1030 that's is good only for 10000kms while the washable racing filter cost only P500 and it's reusable.

Today, I pull out all my Denso Iridium spark plugs, they are all clean and no tip erosion after 5000kms So far I'm happy with my GreenFuel conversion no noticeable difference with Petrol even on uphills.