Is atf 6 the same atf4?

ATF+6 and ATF+4 are not the same, though they are both types of automatic Transmission Fluid. ATF+6 is a newer formulation that offers improved performance, such as better lubrication and thermal stability, compared to ATF+4. While ATF+4 can often be used in certain applications requiring ATF+6, it's generally recommended to use ATF+6 where specified for optimal performance and protection. Always consult your vehicle's manufacturer guidelines to ensure compatibility.