AdBlue is a diesel exhaust fluid, not a fuel additive. It's stored in a separate tank and is topped up via a (usually) blue filler cap located either next to your fuel filler, in the boot or under the bonnet. It’s extremely important that AdBlue is never added to the fuel tank ...
Engine oil changes are recommended about every 10–15,000 miles, and urea solution (also known as DEF or AdBlue), which is required in SCR aftertreatment systems, should be topped off at 5–7000 mile intervals. Other regular maintenance items include air filters and timing belts. Vehicles ...